Toyota PRIUS 2006 Trouble Code Chart

2010 Prius Diagnostic Trouble Code Chart

DTC CODE

DETECTION ITEM

TROUBLE AREA

C1611

ECU Malfunction

1. Parking assist ECU initialization (not initialized
parking assist ECU)

2. Height control sensor vehicle height difference
setting (not initialized parking assist ECU)

3. Rear television camera optical axis adjustment
(initialized parking assist ECU)

4. Steering angle setting (initialized parking
assist ECU)

5. Parking assist ECU

C1612

IG Voltage is Low or High

1. Harness or connector

2. Parking assist ECU

C1613

ACC Voltage is Low or High

1. Harness or connector

2. Parking assist ECU

C1621

Back Camera Power Supply Failure

1. Harness or connector

2. Rear television camera assembly

3. Parking assist ECU

C1622

Open or Short Circuit in Back Camera
Signal

1. Harness or connector

2. Rear television camera assembly

3. Parking assist ECU

C1625

Open or Short in Steering Angle
Sensor +B

1. Harness or connector

2. Steering angle sensor (spiral with sensor cable
sub-assembly)

C1626

Steering Angle Sensor Failure

1. Steering angle sensor (spiral with sensor cable
sub-assembly)

2. Parking assist ECU

ADVANCED PARKING GUIDANCE SYSTEM

HINT:

If a trouble code is output during the DTC check, inspect the trouble areas listed for that code.

Inspect fuses and relays before investigating the trouble areas shown in the table below.

Advanced Parking Guidance System

Page 1 of 112

2010 Prius Diagnostic Trouble Code Chart

DTC CODE

DETECTION ITEM

TROUBLE AREA

C1627

Vehicle Height Sensor Voltage is Low
or High

1. Harness or connector

2. Headlight leveling ECU assembly

3. Parking assist ECU

C1628

Vehicle Height Sensor Failure

1. Harness or connector

2. Rear height control sensor sub-assembly RH

3. Parking assist ECU

C1645

Power Steering Control System
Failure

Power steering system

C164A

EPS Communication Malfunction

1. Parking assist ECU

2. Power steering system

3. Power steering ECU

C164E

Stop Switch Circuit Malfunction

Electronically controlled brake system

C1657

Hybrid Powertrain Control Module

Hybrid control system

C1658

Speed Sensor Malfunction

Electronically controlled brake system

C1659

Brake System Malfunction

Electronically controlled brake system

C1662

Ambient Temperature High

Parking assist ECU

C168B

AVC-LAN Communication Malfunction

AVC-LAN communication

C168C

AVC-LAN Command Time Out

AVC-LAN communication

C1691

Back Camera Initialization Incomplete

1. Height control sensor vehicle height difference
setting

2. Rear television camera optical axis adjustment

3. Parking assist ECU

C1694

Steering Angle Initialization
Incomplete

1. Steering angle setting

2. Parking assist ECU

C1695

Zero point Calibration of Vehicle
Height Sensor Incomplete

1. Height control sensor vehicle height difference
setting

2. Parking assist ECU

C1AE0

Front Left Side Sensor

1. No. 1 ultrasonic sensor (front left side sensor)

2. Parking assist ECU

Page 2 of 112

2010 Prius Diagnostic Trouble Code Chart

DTC CODE

DETECTION ITEM

TROUBLE AREA

C1AE5

Front Right Side Sensor

1. No. 1 ultrasonic sensor (front right side
sensor)

2. Parking assist ECU

U0073

Control Module Communication Bus
Off

CAN communication system

U0126

Lost Communication with Steering
Angle Sensor Module

CAN communication system

U0129

Lost Communication with Brake
System Control Module

CAN communication system

U0131

Lost Communication with Power
Steering Control Module

CAN communication system

U0140

Lost Communication with Main Body
ECU

CAN communication system

U0293

Lost Communication with HV ECU

CAN communication system

U1000

Can Communication Failure(Message
Registry)

Parking assist ECU

C1AEE

APGS Sensor Communication Circuit

1. Harness or connector

2. No. 1 ultrasonic sensor (front left side sensor)

3. No. 1 ultrasonic sensor (front right side
sensor)

4. Parking assist ECU

Page 3 of 112

2010 Prius Diagnostic Trouble Code Chart

Page 4 of 112

2010 Prius Diagnostic Trouble Code Chart

DTC CODE

DETECTION ITEM

TROUBLE AREA

01-21

ROM Error

Radio receiver assembly

01-22

RAM Error

Radio receiver assembly

01-2E

EEPROM Error

Radio receiver assembly

01-D5

Absence of Registration Unit

1. Power source circuit of the component shown
by the sub-code

2. AVC-LAN circuit between the radio receiver
assembly and component shown by the sub­code

3. Component shown by the sub-code

01-D6

No Master

1. Radio receiver assembly power source circuit

2. Power source circuit of the component which
has stored this code

3. AVC-LAN circuit between the radio receiver
assembly and component which has stored this
code

4. Component which has stored this code

5. Radio receiver assembly

01-D7

Connection Check Error

1. Radio receiver assembly power source circuit

2. Power source circuit of the component which
has stored this code

3. AVC-LAN circuit between the radio receiver
assembly and component which has stored this
code

4. Component which has stored this code

5. Radio receiver assembly

01-D8

No Response for Connection Check

1. Power source circuit of the component shown
by the sub-code

2. AVC-LAN circuit between the radio receiver
assembly and component shown by the sub­code

3. Component shown by the sub-code

AUDIO-VISUAL SYSTEM

Communication Diagnosis

Page 5 of 112

2010 Prius Diagnostic Trouble Code Chart

DTC CODE

DETECTION ITEM

TROUBLE AREA

01-D9

Last Mode Error

1. Power source circuit of the component shown
by the sub-code

2. AVC-LAN circuit between the radio receiver
assembly and component shown by the sub­code

3. Component shown by the sub-code

01-DA

No Response Against ON / OFF
Command

1. Power source circuit of the component shown
by the sub-code

2. AVC-LAN circuit between the radio receiver
assembly and component shown by the sub­code

3. Component shown by the sub-code

01-DB

Mode Status Error

1. Power source circuit of the component shown
by the sub-code

2. AVC-LAN circuit between the radio receiver
assembly and component shown by the sub­code

3. Component shown by the sub-code

01-DC

Transmission Error

If the same sub-code is stored in other
components, check power source circuit and
communication system of all components shown
by sub-code

01-DD

Master Reset

1. Radio receiver assembly power source circuit

2. AVC-LAN circuit between the radio receiver
assembly and component which has stored this
code

3. Radio receiver assembly

4. Component which has stored this code

01-DE

Slave Reset

1. Power source circuit of the component shown
by the sub-code

2. AVC-LAN circuit between the radio receiver
assembly and component shown by the sub­code

3. Component shown by the sub-code

Page 6 of 112

2010 Prius Diagnostic Trouble Code Chart

DTC CODE

DETECTION ITEM

TROUBLE AREA

01-DF

Master Error

1. Radio receiver assembly power source circuit

2. AVC-LAN circuit between the radio receiver
assembly and component which has stored this
code

3. Radio receiver assembly

4. Component which has stored this code

01-E0

Registration Complete Indication Error

-

01-E1

Voice Processing Device ON Error

1. Radio receiver assembly power source circuit

2. AVC-LAN circuit between the radio receiver
assembly and component which has stored this
code

3. Radio receiver assembly

4. Component which has stored this code

01-E2

ON / OFF Indication Parameter Error

Radio receiver assembly

01-E3

Registration Demand Transmission

-

01-E4

Multiple Frame Incomplete

-

01-F2

No Response from Diagnosis Memory
Request

Stereo component amplifier assembly

01-FF

No Response to Diagnosis Request

Stereo component amplifier assembly

DTC CODE

DETECTION ITEM

TROUBLE AREA

57-10

TEL ECU Malfunction (TEL)

Radio receiver assembly

57-47

Bluetooth Module Initialization Failed

Radio receiver assembly

DTC CODE

DETECTION ITEM

TROUBLE AREA

60-10

AM Tuner PLL does not Lock

Radio receiver assembly

60-11

FM Tuner PLL does not Lock

Radio receiver assembly

60-42

Tuner Power Source Error

Radio receiver assembly

Telephone

Radio Unit

Page 7 of 112

2010 Prius Diagnostic Trouble Code Chart

DTC CODE

DETECTION ITEM

TROUBLE AREA

60-43

AM Tuner Error

Radio receiver assembly

60-44

FM Tuner Error

Radio receiver assembly

60-50

Malfunction in Internal IC

Radio receiver assembly

DTC CODE

DETECTION ITEM

TROUBLE AREA

62-10

CD Player Mechanical Error

Radio receiver assembly

62-11

CD Insertion and Ejection Error

Radio receiver assembly

62-12

CD Reading Abnormal

Radio receiver assembly

62-41

Wrong Disc

1. CD

2. Radio receiver assembly

62-42

Disc cannot be Read

1. CD

2. Radio receiver assembly

62-43

CD-ROM Abnormal

1. CD

2. Radio receiver assembly

62-44

CD Abnormal

Radio receiver assembly

62-45

Eject Error

Radio receiver assembly

62-46

Scratched / Reversed Disc

1. CD

2. Radio receiver assembly

62-47

High Temperature

Radio receiver assembly

62-48

Excess Current

Radio receiver assembly

62-50

Tray Insertion / Ejection Error

Radio receiver assembly

62-51

Elevator Error

Radio receiver assembly

62-52

Clamp Error

Radio receiver assembly

62-78

DSP Error

-

62-7D

Disc cannot be Played

1. CD

2. Radio receiver assembly

CD Player

Page 8 of 112

2010 Prius Diagnostic Trouble Code Chart

DTC CODE

DETECTION ITEM

TROUBLE AREA

62-7E

No Playable Files

1. CD

2. Radio receiver assembly

62-7F

Copyright Protection Error

1. CD

2. Radio receiver assembly

DTC CODE

DETECTION ITEM

TROUBLE AREA

63-10

CD Changer Mechanical Error

Radio receiver assembly

63-11

CD Insertion and Ejection Error

Radio receiver assembly

63-12

CD Reading Abnormal

Radio receiver assembly

63-41

Wrong Disc

1. CD

2. Radio receiver assembly

63-42

Disc cannot be Read

1. CD

2. Radio receiver assembly

63-43

CD-ROM Abnormal

1. CD

2. Radio receiver assembly

63-44

CD Abnormal

Radio receiver assembly

63-45

Eject Error

Radio receiver assembly

63-46

Scratched / Reversed Disc

1. CD

2. Radio receiver assembly

63-47

High Temperature

Radio receiver assembly

63-48

Excess Current

Radio receiver assembly

63-50

Tray Insertion / Ejection Error

Radio receiver assembly

63-51

Elevator Error

Radio receiver assembly

63-52

Clamp Error

Radio receiver assembly

63-78

DSP Error

-

63-7D

Disc cannot be Played

1. CD

2. Radio receiver assembly

In-dash CD Changer

Page 9 of 112

2010 Prius Diagnostic Trouble Code Chart

DTC CODE

DETECTION ITEM

TROUBLE AREA

63-7E

No Playable Files

1. CD

2. Radio receiver assembly

63-7F

Copyright Protection Error

1. CD

2. Radio receiver assembly

DTC CODE

DETECTION ITEM

TROUBLE AREA

C0-11

Satellite Radio Tuner Internal Circuit
Error 1

Radio receiver assembly

C0-12

Satellite Radio Tuner Internal Circuit
Error 2

Radio receiver assembly

C0-13

Satellite Radio Tuner Internal Circuit
Error 3

Radio receiver assembly

C0-14

Satellite Radio Tuner Internal Circuit
Error 4

Radio receiver assembly

C0-15

Satellite Radio Tuner Internal Circuit
Error 5

Radio receiver assembly

C0-16

Satellite Radio Tuner Internal Circuit
Error 6

Radio receiver assembly

C0-40

Antenna not Connected

1. Antenna cord

2. Amplifier antenna assembly (Satellite radio
antenna)

3. Radio receiver assembly

C0-41

Antenna Shorted

1. Antenna cord

2. Amplifier antenna assembly (Satellite radio
antenna)

3. Radio receiver assembly

XM Tuner

Page 10 of 112

2010 Prius Diagnostic Trouble Code Chart

DTC CODE

DETECTION ITEM

TROUBLE AREA

U0104

Lost Communication with Driving
Support ECU

1. Driving support ECU branch wire or
connector

2. Power source circuit of driving support ECU

3. Driving support ECU

U1002

Lost Communication with Gateway
Module (Power Management1)

1. Open or short in CAN No. 2 bus main wire
or connector

2. Open or short in CAN No. 2 bus branch
wire or connector

3. Power management control ECU

4. Driving support ECU

5. Seat belt control ECU

6. Parking assist ECU

7. CAN No. 3 junction connector

U1100

Lost Communication with Seat Belt
Control ECU

1. Seat belt control ECU branch wire or
connector

2. Power source circuit of seat belt control
ECU

3. Seat belt control ECU

U110B

Lost Communication with Parking Assist
Control Module "B"

1. Parking assist ECU branch wire or
connector

2. Power source circuit of parking assist ECU

3. Parking assist ECU

CAN COMMUNICATION SYSTEM

Power Management Control ECU Output DTCs

(Techstream Display/Power Management1)

Page 11 of 112

2010 Prius Diagnostic Trouble Code Chart

DTC CODE

DETECTION ITEM

TROUBLE AREA

U0100

Lost Communication with ECM / PCM

1. ECM main wire or connector

2. Power source circuit of ECM

3. ECM

U0129

Lost Communication with Brake System
Control Module

1. Skid control ECU branch wire or connector

2. Power source circuit of skid control ECU

3. Skid control ECU

U0164

Lost Communication with A/C ECU

1. Air conditioning amplifier branch wire or
connector

2. Power source circuit of air conditioning
amplifier

3. Air conditioning amplifier

U1002

Lost Communication with Gateway
Module (Power Management2)

1. Open or short in power management bus
main wire or connector

2. Open or short in power management bus
branch wire or connector

3. Power management control ECU

4. ECM

5. Air conditioning amplifier

6. Skid control ECU

7. CAN No. 4 junction connector

DTC CODE

DETECTION ITEM

TROUBLE AREA

U1002

Lost Communication with Gateway
Module (Parking Assist Bus)

1. Open or short in parking assist bus main
wire or connector

2. Open or short in parking assist bus branch
wire or connector

3. Driving support ECU

4. CAN No. 5 junction connector

Power Management Control ECU Output DTCs

(Techstream Display/Power Management2)

Driving Support ECU Output DTCs

(Techstream Display/Pre-Collision2)

Page 12 of 112

2010 Prius Diagnostic Trouble Code Chart

DTC CODE

DETECTION ITEM

TROUBLE AREA

P0571

Brake Switch "A" Circuit

- Stop light switch assembly

- Stop light switch assembly circuit

- Power management control ECU

P0575

Cruise Control Input Circuit

- Power management control ECU

P1578

Brake System Malfunction

- Electronically controlled brake system

U0122

Lost Communication with Vehicle
Dynamics Control Module

- Brake booster with master cylinder (skid
control ECU)

- CAN communication system

- Power management control ECU

CRUISE CONTROL SYSTEM

HINT:

If a trouble code is displayed during the DTC check, inspect the trouble areas listed for that code.

Cruise Control System

Page 13 of 112

2010 Prius Diagnostic Trouble Code Chart

Page 14 of 112

2010 Prius Diagnostic Trouble Code Chart

DTC

CODE

DETECTION ITEM

TROUBLE AREA

C1A01

Driving Support ECU

Driving support ECU

C1A02

Vehicle Information Not Obtained

- Driving support ECU

- Main body ECU

C1A03

Driving Support ECU Internal Logical
Error

Driving support ECU

C1A05

Stop Light Switch Circuit

- Stop light switch assembly

- Stop light switch circuit

- Driving support ECU

C1A06

Stop Light Switch Input Circuit

Driving support ECU

C1A0A

Front Radar Sensor Region Code
Mismatch

- Millimeter wave radar sensor assembly

- Main body ECU

- Driving support ECU

C1A0C

Object Recognition Camera Region Code
Mismatch

- Lane recognition camera sensor assembly

- Driving support ECU

C1A10

Front Radar Sensor

- Millimeter wave radar sensor assembly

- Driving support ECU

C1A11

Front Radar Sensor Incorrect Axial Gap

- Millimeter wave radar sensor assembly

- Driving support ECU

C1A14

Front Radar Sensor Beam Axis Not
Adjusted

- Millimeter wave radar sensor assembly

- Driving support ECU

C1A20

Object Recognition ECU

- Lane recognition camera sensor assembly

- Driving support ECU

C1A22

Object Recognition Camera Incorrect
Axial Gap

- Lane recognition camera sensor assembly

- Driving support ECU

DYNAMIC RADAR CRUISE CONTROL SYSTEM

HINT:

If a trouble code is displayed during the DTC check, inspect the trouble areas listed for that code.

Dynamic Radar Cruise Control System

Page 15 of 112

2010 Prius Diagnostic Trouble Code Chart

DTC

CODE

DETECTION ITEM

TROUBLE AREA

C1A23

Object Recognition Camera Initialization
Incomplete

- Lane recognition camera sensor assembly

- Driving support ECU

C1A40

ENG / EHV Device

- Hybrid control system

- Power management control ECU

- SFI system

- ECM

- Driving support ECU

C1A41

Brake Request Value Mismatch between
ENG / EHV and Driving Support ECU

- Electronically controlled brake system

- Hybrid control system

- Power management control ECU

- Brake booster with maser cylinder (skid
control ECU)

- Driving support ECU

C1A4A

Skid Control Buzzer Circuit

- Electronically controlled brake system

- Driving support ECU

C1A4B

Stop Light Relay Circuit

- Stop light control relay

- Stop light control relay circuit

- Brake booster with maser cylinder (skid
control ECU)

C1A50

Brake System

- Electronically controlled brake system

- Driving support ECU

P1615

Communication Error from Distance
Control ECU to HV ECU

- Driving support ECU

- Power management control ECU

U0122

Lost Communication with Vehicle
Dynamics Control Module

- Brake booster with maser cylinder (skid
control ECU)

- CAN communication system

- Driving support ECU

U0123

Lost Communication with Yaw Rate
Sensor Module

- Yaw rate sensor

- CAN communication system

- Driving support ECU

Page 16 of 112

2010 Prius Diagnostic Trouble Code Chart

DTC

CODE

DETECTION ITEM

TROUBLE AREA

U0126

Lost Communication with Steering Angle
Sensor Module

- Steering angle sensor

- CAN communication system

- Driving support ECU

U0235

Lost Communication with Cruise Control
Front Distance Range Sensor

- Millimeter wave radar sensor assembly

- Millimeter wave radar sensor circuit

- Driving support ECU

U0293

Lost Communication with HV ECU

- Power management control ECU

- CAN communication system

- Driving support ECU

- Brake booster with maser cylinder (skid
control ECU)

U1104

Lost Communication with Driving Support
ECU

- Driving support ECU

- CAN communication system

- Millimeter wave radar sensor assembly

- Power management control ECU

- Brake booster with maser cylinder (skid
control ECU)

U1119

Lost Communication with Object
Recognition ECU (CAN)

- Lane recognition camera sensor assembly

- CAN communication system

- Driving support ECU

Page 17 of 112

2010 Prius Diagnostic Trouble Code Chart

Page 18 of 112

2010 Prius Diagnostic Trouble Code Chart

DTC

CODE

DETECTION ITEM

TROUBLE AREA

MASTER

WARNING

LIGHT

MULTI-

DISPLAY

ERROR

MESSAGE

MEMORY

C2300

Actuator System
Malfunction

- Transmission control ECU
assembly

- Auxiliary battery

- Integration relay

- Shift control actuator
assembly

- Hybrid vehicle transaxle
assembly

- Wire harness or connector

Comes on

Comes on

DTC stored

C2301

Shift Changing Time
Malfunction

- Auxiliary battery

- Shift control actuator
assembly

- Hybrid vehicle transaxle
assembly

- Transmission control ECU
assembly

Comes on

Comes on

DTC stored

C2303

Short in Power
Source Relay Circuit

- Transmission control ECU
assembly

- Integration relay

- Wire harness or connector

Comes on

Comes on

DTC stored

ELECTRONIC SHIFT LEVER SYSTEM

HINT:

 Remove the P CON MAIN fuse to clear DTCs C2300, C2301, C2303, C2304, C2305, C2306,

C2307 and C2309 because they cannot be clear with the Techstream.

 When a DTC is detected, the master warning light comes on and an error message is indicated

on the multi-display.

Electronic Shift Lever System

Page 19 of 112

2010 Prius Diagnostic Trouble Code Chart

DTC

CODE

DETECTION ITEM

TROUBLE AREA

MASTER

WARNING

LIGHT

MULTI-

DISPLAY

ERROR

MESSAGE

MEMORY

C2304

Open or Short Circuit
in U Phase

- Auxiliary battery

- Transmission control ECU
assembly

- Shift control actuator
assembly

- Integration relay

- Wire harness or connector

Comes on

Comes on

DTC stored

C2305

Open or Short Circuit
in V Phase

- Auxiliary battery

- Transmission control ECU
assembly

- Shift control actuator
assembly

- Integration relay

- Wire harness or connector

Comes on

Comes on

DTC stored

C2306

Open or Short Circuit
in W Phase

- Auxiliary battery

- Transmission control ECU
assembly

- Shift control actuator
assembly

- Integration relay

- Wire harness or connector

Comes on

Comes on

DTC stored

C2307

Power Supply

- Transmission control ECU
assembly

- Wire harness or connector

Comes on

Comes on

DTC stored

C2308

EEPROM Malfunction

- Transmission control ECU
assembly

-

-

DTC stored

C2309

Open in B+ Circuit

- Transmission control ECU
assembly

- Auxiliary battery

- Wire harness or connector

Comes on

Comes on

DTC stored

Page 20 of 112

2010 Prius Diagnostic Trouble Code Chart

DTC

CODE

DETECTION ITEM

TROUBLE AREA

MASTER

WARNING

LIGHT

MULTI-

DISPLAY

ERROR

MESSAGE

MEMORY

C2310

Open or Short Circuit
in Battery Circuit

- P CON MAIN fuse

- Transmission control ECU
assembly

- Wire harness or connector

Comes on

Comes on

DTC stored

C2311

Communication Error
from HV ECU

- Transmission control ECU
assembly

- Power management control
ECU

- Wire harness or connector

Comes on

Comes on

DTC stored

C2315

HV System

- Power management control
ECU

Comes on

Comes on

DTC stored

U0146

Lost Communication
with Body ECU

- CAN communication
system

-

-

DTC stored

Page 21 of 112

2010 Prius Diagnostic Trouble Code Chart

Page 22 of 112

2010 Prius Diagnostic Trouble Code Chart

DTC CODE

DETECTION ITEM

INF CODE

TROUBLE AREA

42

Electronically Controlled
Brake System Malfunction

-

Electronically controlled brake system

C0200/31

Front Speed Sensor RH
Circuit

501

502

503

504

506

507

508

1. Open or short in speed sensor

2. Improperly installed speed sensor, or
abnormal clearance between sensor and
rotor

3. Open or short in wire harness

4. Improperly connected connector,
deformation or corrosion of terminals

5. Front speed sensor RH

6. Brake booster with master cylinder (Skid
control ECU)

C0205/32

Front Speed Sensor LH
Circuit

511

512

513

514

516

517

518

1. Open or short in speed sensor

2. Improperly installed speed sensor, or
abnormal clearance between sensor and
rotor

3. Open or short in wire harness

4. Improperly connected connector,
deformation or corrosion of terminals

5. Front speed sensor LH

6. Brake booster with master cylinder (Skid
control ECU)

ELECTRONICALLY CONTROLLED BRAKE SYSTEM

NOTICE:

When replacing the brake booster with master cylinder (skid control ECU), sensor,

etc., make sure that the power switch is turned off, the stop light switch is off, and 2
minutes have elapsed since the driver's door was closed.

HINT:

 If no abnormality is found when inspecting parts, inspect the skid control ECU and ground

points for poor connections.

 When 2 or more DTCs are detected, perform circuit inspections one by one until the problem is

identified.

 Inspect the fuses and relays before inspecting the trouble areas as shown in the table below.

ABS DTC

Page 23 of 112

2010 Prius Diagnostic Trouble Code Chart

DTC CODE

DETECTION ITEM

INF CODE

TROUBLE AREA

C0210/33

Rear Speed Sensor RH
Circuit

521

522

523

524

526

527

528

1. Open or short in speed sensor

2. Improperly installed speed sensor, or
abnormal clearance between sensor and
rotor

3. Open or short in wire harness

4. Improperly connected connector,
deformation or corrosion of terminals

5. Rear speed sensor RH

6. Brake booster with master cylinder (Skid
control ECU)

C0215/34

Rear Speed Sensor LH Circuit

531

532

533

534

536

537

538

1. Open or short in speed sensor

2. Improperly installed speed sensor, or
abnormal clearance between sensor and
rotor

3. Open or short in wire harness

4. Improperly connected connector,
deformation or corrosion of terminals

5. Rear speed sensor LH

6. Brake booster with master cylinder (Skid
control ECU)

C1235/35

Foreign Object is Attached on
Tip of Front Speed Sensor RH

541

1. Speed sensor rotor malfunction (foreign
object attached)

2. Foreign object attached to speed sensor

3. Open or short in speed sensor

4. Open or short in wire harness

5. Improperly connected connector,
deformation or corrosion of terminals

6. Resistance in speed sensor circuit

7. Brake booster with master cylinder (Skid
control ECU)

Page 24 of 112

2010 Prius Diagnostic Trouble Code Chart

DTC CODE

DETECTION ITEM

INF CODE

TROUBLE AREA

C1236/36

Foreign Object is Attached on
Tip of Front Speed Sensor LH

542

1. Speed sensor rotor malfunction (foreign
object attached)

2. Foreign object attached to speed sensor

3. Open or short in speed sensor

4. Open or short in wire harness

5. Improperly connected connector,
deformation or corrosion of terminals

6. Resistance in speed sensor circuit

7. Brake booster with master cylinder (Skid
control ECU)

C1238/38

Foreign Object is Attached on
Tip of Rear Speed Sensor RH

543

1. Speed sensor rotor malfunction (foreign
object attached)

2. Foreign object attached to speed sensor

3. Open or short in speed sensor

4. Open or short in wire harness

5. Improperly connected connector,
deformation or corrosion of terminals

6. Resistance in speed sensor circuit

7. Brake booster with master cylinder (Skid
control ECU)

C1239/39

Foreign Object is Attached on
Tip of Rear Speed Sensor LH

544

1. Speed sensor rotor malfunction (foreign
object attached)

2. Foreign object attached to speed sensor

3. Open or short in speed sensor

4. Open or short in wire harness

5. Improperly connected connector,
deformation or corrosion of terminals

6. Resistance in speed sensor circuit

7. Brake booster with master cylinder (Skid
control ECU)

C1243/43

Acceleration Sensor Stuck
Malfunction

561

562

563

564

Yaw rate and acceleration sensor internal
stuck malfunction

Page 25 of 112

2010 Prius Diagnostic Trouble Code Chart

DTC CODE

DETECTION ITEM

INF CODE

TROUBLE AREA

C1244/44

Open or Short in Acceleration
Sensor Circuit

571

1. Yaw rate and acceleration sensor installed
improperly

2. Yaw rate and acceleration sensor

C1245/45

Acceleration Sensor Output
Malfunction

581

1. Yaw rate and acceleration sensor installed
improperly

2. Yaw rate and acceleration sensor

C1336/98

Zero Point Calibration of
Acceleration Sensor Undone

-

1. Zero point calibration undone

2. Yaw rate and acceleration sensor

3. Brake booster with master cylinder (Skid
control ECU)

(Perform zero point calibration and check for
DTCs. If no DTCs are output again, the
sensor is normal.)

C1381/97

Acceleration Sensor Power
Supply Voltage Malfunction

601

1. Yaw rate and acceleration sensor supply
voltage shut down

2. Yaw rate and acceleration sensor

3. Brake booster with master cylinder (Skid
control ECU)

C1442/44

Invalid Data Received from
Acceleration Sensor

572

Yaw rate and acceleration sensor

U0124/95

Lost Communication with
Lateral Acceleration Sensor
Module

591

592

1. CAN communication line (CAN No. 1 bus)

2. Yaw rate and acceleration sensor

3. Brake booster with master cylinder (Skid
control ECU)

DTC CODE

DETECTION ITEM

INF CODE

TROUBLE AREA

43

ABS Control System
Malfunction

-

ABS control system

45

Electronically Controlled
Brake System Malfunction

-

Electronically controlled brake system

VSC DTC

Page 26 of 112

2010 Prius Diagnostic Trouble Code Chart

DTC CODE

DETECTION ITEM

INF CODE

TROUBLE AREA

C1210/36

Zero Point Calibration of Yaw
Rate Sensor Undone

-

1. Zero point calibration undone

2. Yaw rate and acceleration sensor

3. Brake booster with master cylinder (Skid
control ECU)

(Perform zero point calibration and check for
DTCs. If no DTCs are output again, the
sensor is normal.)

C1231/31

Steering Angle Sensor
Circuit Malfunction

701

702

703

Steering angle sensor internal malfunction

C1234/34

Yaw Rate Sensor Malfunction

711

712

713

714

Yaw rate and acceleration sensor internal
malfunction

C1290/66

Steering Angle Sensor Zero
Point Malfunction

751

1. Yaw rate and acceleration sensor zero
point calibration incomplete

2. Poor adjustment of the center position of
the steering wheel

3. Poor adjustment of front wheel alignment

C1310/51

Malfunction in HV system

-

Power management control ECU (Hybrid
vehicle control ECU)

C1380/64

Stop Light Control Relay
Malfunction

761

762

1. Stop light switch

2. Stop light switch circuit

3. Stop light control relay

4. Stop light control relay circuit

5. Brake booster with master cylinder (Skid
control ECU)

C1439/66

Steering Angle Sensor
Initialization Incomplete

752

1. Steering angle sensor

2. Yaw rate and acceleration sensor

3. Brake booster with master cylinder (Skid
control ECU)

C1440/98

Unusual Bank Angle
Detected

-

Yaw rate and acceleration sensor

C1443/34

Invalid Data Received from
Yaw Rate Sensor

715

Yaw rate and acceleration sensor

Page 27 of 112

2010 Prius Diagnostic Trouble Code Chart

DTC CODE

DETECTION ITEM

INF CODE

TROUBLE AREA

C1445/66

Vehicle Driven with Steering
Angle Sensor not Initialized

753

1. Steering angle sensor

2. Yaw rate and acceleration sensor

3. Brake booster with master cylinder (Skid
control ECU)

U0123/62

Lost Communication with
Yaw Rate Sensor Module

731

732

1. CAN communication line (CAN No. 1 bus)

2. Yaw rate and acceleration sensor

3. Brake booster with master cylinder (Skid
control ECU)

U0126/63

Lost Communication with
Steering Angle Sensor
Module

741

742

1. CAN communication line (CAN No. 1 bus)

2. Steering angle sensor

3. Brake booster with master cylinder (Skid
control ECU)

DTC CODE

DETECTION ITEM

INF CODE

TROUBLE AREA

36

ABS Control System
Malfunction

-

ABS control system

C1202/68

Master Reservoir Level
Malfunction

371

1. Low brake fluid level

2. Brake fluid leaks

3. Brake master cylinder reservoir (Brake
fluid level warning switch) internal open
circuit

4. Brake master cylinder reservoir (Brake
fluid level warning switch) internal short
circuit

5. Open in wire harness

6. Short in wire harness

7. Brake disc rotor excessive wear

8. Brake booster with master cylinder (Skid
control ECU)

C1203/95

ECM Communication Circuit
Malfunction

-

1. The wrong ECU and sensor was installed

2. Brake booster with master cylinder (Skid
control ECU)

Electronically Controlled Brake System DTC

Page 28 of 112

2010 Prius Diagnostic Trouble Code Chart

DTC CODE

DETECTION ITEM

INF CODE

TROUBLE AREA

C1211/25

SLA Linear Solenoid

21

22

23

24

1. Supply voltage reduced

2. Brake booster with master cylinder (Skid
control ECU or brake actuator)

C1212/26

SLR Linear Solenoid

31

32

33

34

1. Supply voltage reduced

2. Brake booster with master cylinder (Skid
control ECU or brake actuator)

C1214/62

Hydraulic Control System
Malfunction

431

432

433

434

435

436

437

438

1. Brake fluid leaks

2. Brake disc rotor excessive wear

3. Brake booster with master cylinder (Brake
actuator)

C1225/31

SA1 Solenoid Circuit

41

42

43

44

1. Supply voltage reduced

2. Brake booster with master cylinder (Skid
control ECU or brake actuator)

C1226/32

SA2 Solenoid Circuit

51

52

53

54

1. Supply voltage reduced

2. Brake booster with master cylinder (Skid
control ECU or brake actuator)

C1227/33

SA3 Solenoid Circuit

61

62

63

64

1. Supply voltage reduced

2. Brake booster with master cylinder (Skid
control ECU or brake actuator)

C1228/34

STR Solenoid Circuit

71

72

73

74

1. Supply voltage reduced

2. Brake booster with master cylinder (Skid
control ECU or brake actuator)

Page 29 of 112

2010 Prius Diagnostic Trouble Code Chart

DTC CODE

DETECTION ITEM

INF CODE

TROUBLE AREA

C1242/42

Open in IG1 / IG2 Power
Source Circuit

111

112

1. Open or short in IG1 circuit

2. Open or short in IG2 circuit

3. Improperly connected connector,
deformation or corrosion of terminals

4. Smart key system (IG start circuit)

5. Auxiliary battery

6. Hybrid control system (Charging circuit)

7. Brake booster with master cylinder (Skid
control ECU)

C1246/46

Master Cylinder Pressure
Sensor Malfunction

201

202

203

204

207

1. Brake pedal stroke sensor

2. Brake booster with master cylinder (Skid
control ECU or brake actuator)

C1247/47

Stroke Sensor Malfunction

211

212

213

214

215

216

217

218

219

220

221

222

223

1. Open or short in brake pedal stroke sensor
power supply circuit

2. Open or short in wire harness

3. Improperly connected connector,
deformation or corrosion of terminals

4. Brake pedal stroke sensor

5. Brake booster with master cylinder (Skid
control ECU)

C1249/49

Open in Stop Light Switch
Circuit

231

1. STOP fuse

2. Stop light switch

3. Stop light switch circuit

4. Brake booster with master cylinder (Skid
control ECU)

Page 30 of 112

2010 Prius Diagnostic Trouble Code Chart

DTC CODE

DETECTION ITEM

INF CODE

TROUBLE AREA

C1252/52

Brake Booster Pump Motor
on Time Abnormally Long

311

1. Short in motor circuit or motor monitor
circuit

2. Motor relay stuck

3. Accumulator pressure sensor malfunction
in brake actuator

4. Brake booster with master cylinder (Skid
control ECU)

C1253/53

Pump Motor Relay
Malfunction

321

322

323

324

325

326

327

328

329

1. Open or short in motor circuit or motor
monitor circuit

2. Brake booster with master cylinder (Skid
control ECU)

C1256/56

Accumulator Low Pressure

341

1. Accumulator pressure dropped due to
frequent brake pedal operation (not a
malfunction)

2. Pump motor malfunction

3. Accumulator deterioration

4. Accumulator pressure sensor

5. Supply voltage reduced

C1257/57

Power Supply Drive Circuit

361

362

Brake booster with master cylinder (Skid
control ECU)

C1259/58

HV System Regenerative
Malfunction

-

Power management control ECU (Hybrid
vehicle control ECU)

C1300

Skid Control ECU Malfunction

-

Brake booster with master cylinder (Skid
control ECU)

C1311/11

Open in Main Relay 1 Circuit

1

1. Open or short in ABS main relay circuit

2. Brake booster with master cylinder (Skid
control ECU)

Page 31 of 112

2010 Prius Diagnostic Trouble Code Chart

DTC CODE

DETECTION ITEM

INF CODE

TROUBLE AREA

C1312/12

Short in Main Relay 1 Circuit

2

1. Short in ABS main relay circuit

2. ABS main relay internal stuck

3. Brake booster with master cylinder (Skid
control ECU)

C1345/66

Linear Solenoid Valve Offset
Learning Undone

-

Perform linear valve offset learning and
check for DTCs. If no DTCs are output again,
the valve is normal.

C1352/21

Front Increasing Pressure
Solenoid RH Malfunction

11

12

Brake booster with master cylinder (Skid
control ECU or brake actuator)

C1353/23

Front Increasing Pressure
Solenoid LH Malfunction

15

16

Brake booster with master cylinder (Skid
control ECU or brake actuator)

C1356/22

Front Decreasing Pressure
Solenoid RH Malfunction

13

14

Brake booster with master cylinder (Skid
control ECU or brake actuator)

C1357/24

Front Decreasing Pressure
Solenoid LH Malfunction

17

18

Brake booster with master cylinder (Skid
control ECU or brake actuator)

C1364/61

Wheel Cylinder Pressure
Sensor Malfunction

421

422

423

424

426

Brake booster with master cylinder (Skid
control ECU or brake actuator)

C1365/54

Accumulator Pressure Sensor
Malfunction

331

332

333

334

Brake booster with master cylinder (Skid
control ECU or brake actuator)

C1368/67

Linear Solenoid Valve Offset
Malfunction

-

1. Perform linear valve offset learning and
check for DTCs. If no DTCs are output again,
the valve is normal.

2. Brake booster with master cylinder (Brake
actuator)

C1391/69

Accumulator Leak
Malfunction

351

1. Brake fluid leaks

2. Brake booster with master cylinder (Brake
actuator)

(Malfunctioning internal seal, low gas
pressure in accumulator, etc.)

Page 32 of 112

2010 Prius Diagnostic Trouble Code Chart

DTC CODE

DETECTION ITEM

INF CODE

TROUBLE AREA

C1392/48

Stroke Sensor Zero Point
Calibration Undone

-

1. Brake pedal stroke sensor zero point
calibration incomplete (Initialization and
calibration of linear solenoid valve
incomplete)

2. Brake booster with master cylinder (Skid
control ECU)

C1451/72

Motor Drive Permission
Malfunction

-

1. Brake fluid leaks

2. Air bleeding not performed

U0073/94

Control Module
Communication Bus OFF

461

462

463

464

465

466

1. CAN communication line (CAN No. 1 bus)

2. Yaw rate and acceleration sensor

3. Steering angle sensor

4. Brake booster with master cylinder (Skid
control ECU)

U0293/59

Communication Error from
HV ECU

411

412

413

1. CAN communication line (Power
management bus)

2. Power management control ECU (Hybrid
vehicle control ECU)

3. Brake booster with master cylinder (Skid
control ECU)

DTC CODE

DETECTION ITEM

INF CODE

TROUBLE AREA

C1241/41

Low Battery Positive Voltage

101*1

102*2

551*2

552*2

553*2

1. Improperly connected connector,
deformation or corrosion of terminals

2. Auxiliary battery

3. Hybrid control system (Charging circuit)

4. Brake booster with master cylinder (Skid
control ECU)

ABS and Electronically Controlled Brake System DTC

*1: Electronically Controlled Brake System DTC

*2: ABS DTC

Page 33 of 112

2010 Prius Diagnostic Trouble Code Chart

DTC CODE

DETECTION ITEM

INF CODE

TROUBLE AREA

C1271/71

Low Output Signal of Front
Speed Sensor RH (Test Mode
DTC)

-

1. Front speed sensor RH

2. Sensor installation

3. Speed sensor rotor

C1272/72

Low Output Signal of Front
Speed Sensor LH (Test Mode
DTC)

-

1. Front speed sensor LH

2. Sensor installation

3. Speed sensor rotor

C1273/73

Low Output Signal of Rear
Speed Sensor RH (Test Mode
DTC)

-

1. Rear speed sensor RH

2. Sensor installation

3. Speed sensor rotor

C1274/74

Low Output Signal of Rear
Speed Sensor LH (Test Mode
DTC)

-

1. Rear speed sensor LH

2. Sensor installation

3. Speed sensor rotor

C1275/75

Abnormal Change in Output
Signal of Front Speed Sensor
RH (Test Mode DTC)

-

1. Front speed sensor RH

2. Speed sensor rotor

C1276/76

Abnormal Change in Output
Signal of Front Speed Sensor
LH (Test Mode DTC)

-

1. Front speed sensor LH

2. Speed sensor rotor

C1277/77

Abnormal Change in Output
Signal of Rear Speed Sensor
RH (Test Mode DTC)

-

1. Rear speed sensor RH

2. Speed sensor rotor

C1278/78

Abnormal Change in Output
Signal of Rear Speed Sensor
LH (Test Mode DTC)

-

1. Rear speed sensor LH

2. Speed sensor rotor

C1279/79

Acceleration Sensor Output
Voltage Malfunction (Test
Mode DTC)

-

1. Sensor installation

2. Yaw rate and acceleration sensor

C1281/81

Master Cylinder Pressure
Sensor Output Malfunction
(Test Mode DTC)

-

1. Stop light switch

2. Regulator pressure sensor

ABS Test Mode DTC

Page 34 of 112

2010 Prius Diagnostic Trouble Code Chart

DTC CODE

DETECTION ITEM

INF CODE

TROUBLE AREA

C0371/71

Yaw Rate Sensor (Test Mode
DTC)

-

1. Sensor installation

2. Yaw rate and acceleration sensor

DTC CODE

DETECTION ITEM

INF CODE

TROUBLE AREA

C1346/71

Stroke Sensor Zero Point
Learning Malfunction (Test
Mode DTC)

-

1. Brake pedal stroke sensor

2. Brake pedal stroke sensor circuit

VSC Test Mode DTC

Electronically Controlled Brake System Test Mode DTC

Page 35 of 112

2010 Prius Diagnostic Trouble Code Chart

Page 36 of 112

2010 Prius Diagnostic Trouble Code Chart

DTC CODE

DETECTION ITEM

TROUBLE AREA

MIL

P0A7F-123

Hybrid Battery Pack Deterioration

1. HV battery assembly

2. Battery smart unit

Comes on

P0A80-123

Replace Hybrid Battery Pack

1. HV battery assembly

2. Battery smart unit

Comes on

P0A82-123

Hybrid Battery Pack Cooling Fan 1

1. Battery cooling blower assembly

2. Battery smart unit

3. Power management control ECU

4. HV battery intake duct

5. Wire harness or connector

-

P0A84-123

Hybrid Battery Pack Cooling Fan 1

1. Wire harness or connector

2. Integration relay

3. Battery cooling blower assembly

4. Battery smart unit

5. Power management control ECU

­P0A85-123

Hybrid Battery Pack Cooling Fan 1

1. Wire harness or connector

2. Battery cooling blower assembly

3. Battery smart unit

4. HV battery assembly

-

P0A95-123

High Voltage Fuse

1. Service plug grip

2. HV battery assembly

-

P0A9C-123

Hybrid Battery Temperature Sensor
"A" Range / Performance

1. HV battery assembly

2. Battery smart unit

3. Wire harness or connector

Comes on

P0A9D-123

Hybrid Battery Temperature Sensor
"A" Circuit Low

1. HV battery assembly

2. Battery smart unit

3. Wire harness or connector

4. Hybrid battery junction block

Comes on

HYBRID BATTERY SYSTEM

Hybrid Battery System

Page 37 of 112

2010 Prius Diagnostic Trouble Code Chart

DTC CODE

DETECTION ITEM

TROUBLE AREA

MIL

P0A9E-123

Hybrid Battery Temperature Sensor
"A" Circuit High

1. HV battery assembly

2. Battery smart unit

3. Wire harness or connector

4. Hybrid battery junction block

Comes on

P0AAE-123

Hybrid Battery Pack Air Temperature
Sensor "A" Circuit Low

1. HV battery assembly

2. Battery smart unit

3. Wire harness or connector

4. Hybrid battery junction block

-

P0AAF-123

Hybrid Battery Pack Air Temperature
Sensor "A" Circuit High

1. HV battery assembly

2. Battery smart unit

3. Wire harness or connector

4. Hybrid battery junction block

­P0ABF-123

Hybrid Battery Pack Current Sensor
Circuit

1. Hybrid battery junction block

2. Battery smart unit

3. Wire harness or connector

Comes on
P0AC0-123

Hybrid Battery Pack Current Sensor
Circuit Range / Performance

1. Hybrid battery junction block

2. Battery smart unit

Comes on

P0AC1-123

Hybrid Battery Pack Current Sensor
Circuit Low

1. Hybrid battery junction block

2. Battery smart unit

3. Wire harness or connector

Comes on

P0AC2-123

Hybrid Battery Pack Current Sensor
Circuit High

1. Hybrid battery junction block

2. Battery smart unit

3. Wire harness or connector

Comes on

P0AC6-123

Hybrid Battery Temperature Sensor
"B" Range / Performance

1. HV battery assembly

2. Battery smart unit

3. Wire harness or connector

Comes on

P0AC7-123

Hybrid Battery Temperature Sensor
"B" Circuit Low

1. HV battery assembly

2. Battery smart unit

3. Wire harness or connector

4. Hybrid battery junction block

Comes on

Page 38 of 112

2010 Prius Diagnostic Trouble Code Chart

DTC CODE

DETECTION ITEM

TROUBLE AREA

MIL

P0AC8-123

Hybrid Battery Temperature Sensor
"B" Circuit High

1. HV battery assembly

2. Battery smart unit

3. Wire harness or connector

4. Hybrid battery junction block

Comes on
P0ACB-123

Hybrid Battery Temperature Sensor
"C" Range / Performance

1. HV battery assembly

2. Battery smart unit

3. Wire harness or connector

Comes on

P0ACC-123

Hybrid Battery Temperature Sensor
"C" Circuit Low

1. HV battery assembly

2. Battery smart unit

3. Wire harness or connector

4. Hybrid battery junction block

Comes on

P0ACD-123

Hybrid Battery Temperature Sensor
"C" Circuit High

1. HV battery assembly

2. Battery smart unit

3. Wire harness or connector

4. Hybrid battery junction block

Comes on

P0AFC-123

Hybrid Battery Pack Sensor Module

1. Battery smart unit

2. Wire harness or connector

3. IGCT fuse

4. IGCT No. 2 fuse

5. IGCT relay

Comes on

P0B3D-123

Hybrid Battery Voltage Sensor "A"
Circuit Low

1. Battery smart unit

2. HV battery assembly

Comes on

P0B42-123

Hybrid Battery Voltage Sensor "B"
Circuit Low

1. Battery smart unit

2. HV battery assembly

Comes on

P0B47-123

Hybrid Battery Voltage Sensor "C"
Circuit Low

1. Battery smart unit

2. HV battery assembly

Comes on

P0B4C-123

Hybrid Battery Voltage Sensor "D"
Circuit Low

1. Battery smart unit

2. HV battery assembly

Comes on

P0B51-123

Hybrid Battery Voltage Sensor "E"
Circuit Low

1. Battery smart unit

2. HV battery assembly

Comes on

P0B56-123

Hybrid Battery Voltage Sensor "F"
Circuit Low

1. Battery smart unit

2. HV battery assembly

Comes on

Page 39 of 112

2010 Prius Diagnostic Trouble Code Chart

DTC CODE

DETECTION ITEM

TROUBLE AREA

MIL

P0B5B-123

Hybrid Battery Voltage Sensor "G"
Circuit Low

1. Battery smart unit

2. HV battery assembly

Comes on

P0B60-123

Hybrid Battery Voltage Sensor "H"
Circuit Low

1. Battery smart unit

2. HV battery assembly

Comes on

P0B65-123

Hybrid Battery Voltage Sensor "I"
Circuit Low

1. Battery smart unit

2. HV battery assembly

Comes on

P0B6A-123

Hybrid Battery Voltage Sensor "J"
Circuit Low

1. Battery smart unit

2. HV battery assembly

Comes on

P0B6F-123

Hybrid Battery Voltage Sensor "K"
Circuit Low

1. Battery smart unit

2. HV battery assembly

Comes on

P0B74-123

Hybrid Battery Voltage Sensor "L"
Circuit Low

1. Battery smart unit

2. HV battery assembly

Comes on

P0B79-123

Hybrid Battery Voltage Sensor "M"
Circuit Low

1. Battery smart unit

2. HV battery assembly

Comes on

P0B7E-123

Hybrid Battery Voltage Sensor "N"
Circuit Low

1. Battery smart unit

2. HV battery assembly

Comes on

P0B83-123

Hybrid Battery Voltage Sensor "O"
Circuit Low

1. Battery smart unit

2. HV battery assembly

Comes on

P3011-123

Battery Block 1 Becomes Weak

1. HV battery assembly

2. Battery smart unit

Comes on

P3012-123

Battery Block 2 Becomes Weak

1. HV battery assembly

2. Battery smart unit

Comes on

P3013-123

Battery Block 3 Becomes Weak

1. HV battery assembly

2. Battery smart unit

Comes on

P3014-123

Battery Block 4 Becomes Weak

1. HV battery assembly

2. Battery smart unit

Comes on

P3015-123

Battery Block 5 Becomes Weak

1. HV battery assembly

2. Battery smart unit

Comes on

P3016-123

Battery Block 6 Becomes Weak

1. HV battery assembly

2. Battery smart unit

Comes on

Page 40 of 112

2010 Prius Diagnostic Trouble Code Chart

DTC CODE

DETECTION ITEM

TROUBLE AREA

MIL

P3017-123

Battery Block 7 Becomes Weak

1. HV battery assembly

2. Battery smart unit

Comes on

P3018-123

Battery Block 8 Becomes Weak

1. HV battery assembly

2. Battery smart unit

Comes on

P3019-123

Battery Block 9 Becomes Weak

1. HV battery assembly

2. Battery smart unit

Comes on

P3020-123

Battery Block 10 Becomes Weak

1. HV battery assembly

2. Battery smart unit

Comes on

P3021-123

Battery Block 11 Becomes Weak

1. HV battery assembly

2. Battery smart unit

Comes on

P3022-123

Battery Block 12 Becomes Weak

1. HV battery assembly

2. Battery smart unit

Comes on

P3023-123

Battery Block 13 Becomes Weak

1. HV battery assembly

2. Battery smart unit

Comes on

P3024-123

Battery Block 14 Becomes Weak

1. HV battery assembly

2. Battery smart unit

Comes on

P3065-123

Hybrid Battery Temperature Sensor
Range / Perfoemance Stack A

1. HV battery assembly

2. Battery smart unit

3. Wire harness or connector

Comes on
P308A-123

Hybrid Battery Voltage Sensor All
Circuits Low

1. Battery smart unit

2. HV battery assembly

Comes on

U029A-123

Lost Communication with Hybrid
Battery Pack Sensor Module

1. Wire harness or connector

2. Power management control ECU

3. Battery smart unit

4. IGCT fuse

5. IGCT NO. 2 fuse

6. IGCT relay

Comes on

Page 41 of 112

2010 Prius Diagnostic Trouble Code Chart

Page 42 of 112

2010 Prius Diagnostic Trouble Code Chart

DTC CODE

DETECTION ITEM

TROUBLE AREA

MASTER

WARNING

LIGHT

MIL

P0069-273

Manifold Absolute
Pressure - Barometric
Pressure Correlation

- Inverter with converter assembly

- Manifold absolute pressure sensor

- ECM

- Wire harness or connector

Comes on

-

P0340-886

Camshaft Position
Sensor "A" Circuit

- Wire harness or connector

- Camshaft position sensor

- Inverter with converter assembly

- ECM

- Power management control ECU

Comes on

-

P0343-747

Camshaft Position
Sensor "A" Circuit High
Input

- SFI system

- Inverter with converter assembly

- ECM

- Power management control ECU

- Wire harness or connector

Comes on

-

P0516-769

Battery Temperature
Sensor Circuit Low

- Thermistor assembly

- Wire harness or connector

- Power management control ECU

- - P0517-770

Battery Temperature
Sensor Circuit High

- Thermistor assembly

- Wire harness or connector

- Power management control ECU

-

-

P060B-134

Internal Control Module
A/D Processing
Performance

Power management control ECU

Comes on

Comes on

P060B-135

Internal Control Module
A/D Processing
Performance

Power management control ECU

Comes on

Comes on

P060B-570

Internal Control Module
A/D Processing
Performance

Power management control ECU

Comes on

Comes on

HYBRID CONTROL SYSTEM

Hybrid Vehicle Control System

Page 43 of 112

2010 Prius Diagnostic Trouble Code Chart

DTC CODE

DETECTION ITEM

TROUBLE AREA

MASTER

WARNING

LIGHT

MIL

P062F-143

EEPROM Malfunction

Power management control ECU

Comes on

Comes on

P062F-165

EEPROM Malfunction

Power management control ECU

Comes on

Comes on

P0630-804

VIN not Programmed or
Mismatch-ECM / PCM

Power management control ECU

Comes on

-

P06A4-209

Sensor Reference
Voltage "D" Circuit Low

Power management control ECU

Comes on

-

P06A5-210

Sensor Reference
Voltage "D" Circuit High

Power management control ECU

Comes on

-

P082B-575

Gear Lever X Position
Circuit Low

- Wire harness or connector

- Shift lock control unit assembly

- Power management control ECU

Comes on

-

P082C-576

Gear Lever X Position
Circuit High

- Wire harness or connector

- Shift lock control unit assembly

- Power management control ECU

Comes on

-

P082E-571

Gear Lever Y Position
Circuit Low

- Wire harness or connector

- Shift lock control unit assembly

- Power management control ECU

Comes on

-

P082F-572

Gear Lever Y Position
Circuit High

- Wire harness or connector

- Shift lock control unit assembly

- Power management control ECU

Comes on

-

P0851-579

Park / Neutral Switch
Input Circuit Low

- Wire harness or connector

- Transmission shift main switch (P
position switch)

- Power management control ECU

Comes on

-

P0852-580

Park / Neutral Switch
Input Circuit High

- Wire harness or connector

- Transmission shift main switch (P
position switch)

- Power management control ECU

Comes on

­P085D-582

Gear Shift Control
Module "A" Performance

- Wire harness or connector

- Transmission control ECU assembly

- Power management control ECU

Comes on

-

Page 44 of 112

2010 Prius Diagnostic Trouble Code Chart

DTC CODE

DETECTION ITEM

TROUBLE AREA

MASTER

WARNING

LIGHT

MIL

P085D-599

Gear Shift Control
Module "A" Performance

- Wire harness or connector

- Transmission control ECU assembly

- Power management control ECU

Comes on

-

P0861-597

Gear Shift Control
Module "A"
Communication Circuit
Low

- Wire harness or connector

- Transmission control ECU assembly

- Power management control ECU

Comes on

-

P0862-598

Gear Shift Control
Module "A"
Communication Circuit
High

- Wire harness or connector

- Transmission control ECU assembly

- Power management control ECU

Comes on

-

P0A01-726

Motor Electronics
Coolant Temperature
Sensor Circuit Range /
Performance

- Inverter cooling system

- Cooling fan system

- Power management control ECU

- Inverter with converter assembly

- Water pump with motor assembly

- Wire harness or connector

- IGCT No. 3 fuse

Comes on

-

P0A02-719

Motor Electronics
Coolant Temperature
Sensor Circuit Low

Inverter with converter assembly

Comes on

-

P0A03-720

Motor Electronics
Coolant Temperature
Sensor Circuit High

Inverter with converter assembly

Comes on

-

P0A04-725

Motor Electronics
Coolant Temperature
Sensor Circuit
Intermittent

- Inverter cooling system

- Cooling fan system

- Power management control ECU

- Inverter with converter assembly

- Water pump with motor assembly

- Wire harness or connector

- IGCT No. 3 fuse

Comes on

-

Page 45 of 112

2010 Prius Diagnostic Trouble Code Chart

DTC CODE

DETECTION ITEM

TROUBLE AREA

MASTER

WARNING

LIGHT

MIL

P0A08-264

DC / DC Converter
Status Circuit

- Wire harness or connector

- Water pump with motor assembly

- Inverter cooling system

- Hybrid vehicle transaxle assembly

- Generator cable

- Motor cable

- Frame wire

- Inverter with converter assembly

- Fusible link block assembly (MAIN)

- Fuse (DC/DC-S, IGCT, IGCT No. 2,
IGCT No. 3)

- Fusible link block assembly (DC/DC)

Comes on

-

P0A09-265

DC / DC Converter
Status Circuit Low Input

- Wire harness or connector

- Inverter with converter assembly

- Power management control ECU

Comes on

-

P0A09-591

DC / DC Converter
Status Circuit Low Input

- Wire harness or connector

- Inverter with converter assembly

- Power management control ECU

Comes on

-

P0A0D-350

High Voltage System
Inter-Lock Circuit High

- Wire harness or connector

- Service plug grip

- Power management control ECU

- Inverter with converter assembly

- Frame wire

- Inverter terminal cover

Comes on

-

P0A0D-351

High Voltage System
Inter-Lock Circuit High

- Wire harness or connector

- Service plug grip

- Power management control ECU

- Inverter with converter assembly

- Frame wire

- Inverter terminal cover

Comes on

-

P0A0F-204

Engine Failed to Start

- SFI system

- Power management control ECU

Comes on

-

Page 46 of 112

2010 Prius Diagnostic Trouble Code Chart

DTC CODE

DETECTION ITEM

TROUBLE AREA

MASTER

WARNING

LIGHT

MIL

P0A0F-205

Engine Failed to Start

- SFI system

- Power management control ECU

Comes on

-

P0A0F-206

Engine Failed to Start

- SFI system

- Power management control ECU

Comes on

-

P0A0F-238

Engine Failed to Start

- Hybrid vehicle transaxle assembly

- Transmission input damper
assembly

- Power management control ECU

- Engine

Comes on

-

P0A0F-524

Engine Failed to Start

- SFI system

- Power management control ECU

Comes on

-

P0A0F-525

Engine Failed to Start

- SFI system

- Power management control ECU

Comes on

-

P0A10-263

DC / DC Converter
Status Circuit High Input

- Wire harness or connector

- Inverter with converter assembly

- Power management control ECU

Comes on

-

P0A10-592

DC / DC Converter
Status Circuit High Input

- Wire harness or connector

- Inverter with converter assembly

- Power management control ECU

Comes on

­P0A1A-151

Generator Control
Module

Inverter with converter assembly

Comes on

Comes on

P0A1A-155

Generator Control
Module

Inverter with converter assembly

Comes on

Comes on

P0A1A-156

Generator Control
Module

Inverter with converter assembly

Comes on

Comes on

P0A1A-166

Generator Control
Module

Inverter with converter assembly

Comes on

Comes on

P0A1A-200

Generator Control
Module

- Inverter with converter assembly

- Hybrid vehicle transaxle assembly

- Wire harness or connector

Comes on

Comes on

Page 47 of 112

2010 Prius Diagnostic Trouble Code Chart

DTC CODE

DETECTION ITEM

TROUBLE AREA

MASTER

WARNING

LIGHT

MIL

P0A1A-658

Generator Control
Module

Inverter with converter assembly

Comes on

Comes on

P0A1A-659

Generator Control
Module

Inverter with converter assembly

Comes on

Comes on

P0A1A-791

Generator Control
Module

Inverter with converter assembly

Comes on

Comes on

P0A1A-792

Generator Control
Module

- Inverter with converter assembly

- Hybrid vehicle transaxle assembly

- Wire harness or connector

Comes on

Comes on

P0A1A-793

Generator Control
Module

- Inverter with converter assembly

- Hybrid vehicle transaxle assembly

- Wire harness or connector

Comes on

Comes on
P0A1B-163

Drive Motor "A" Control
Module

Inverter with converter assembly

Comes on

Comes on

P0A1B-164

Drive Motor "A" Control
Module

Inverter with converter assembly

Comes on

Comes on

P0A1B-168

Drive Motor "A" Control
Module

- Inverter with converter assembly

- Hybrid vehicle transaxle assembly

- Wire harness or connector

Comes on

Comes on
P0A1B-192

Drive Motor "A" Control
Module

Inverter with converter assembly

Comes on

Comes on

P0A1B-193

Drive Motor "A" Control
Module

Inverter with converter assembly

Comes on

Comes on

P0A1B-198

Drive Motor "A" Control
Module

Inverter with converter assembly

Comes on

Comes on

P0A1B-511

Drive Motor "A" Control
Module

Inverter with converter assembly

Comes on

Comes on

P0A1B-512

Drive Motor "A" Control
Module

Inverter with converter assembly

Comes on

Comes on

P0A1B-661

Drive Motor "A" Control
Module

Inverter with converter assembly

Comes on

Comes on

Page 48 of 112

2010 Prius Diagnostic Trouble Code Chart

DTC CODE

DETECTION ITEM

TROUBLE AREA

MASTER

WARNING

LIGHT

MIL

P0A1B-786

Drive Motor "A" Control
Module

Inverter with converter assembly

Comes on

Comes on

P0A1B-794

Drive Motor "A" Control
Module

Inverter with converter assembly

Comes on

Comes on

P0A1B-795

Drive Motor "A" Control
Module

- Inverter with converter assembly

- Hybrid vehicle transaxle assembly

- Wire harness or connector

Comes on

Comes on

P0A1B-796

Drive Motor "A" Control
Module

- Inverter with converter assembly

- Hybrid vehicle transaxle assembly

- Wire harness or connector

Comes on

Comes on
P0A1D-144

Hybrid Powertrain
Control Module

Power management control ECU

Comes on

Comes on

P0A1D-148

Hybrid Powertrain
Control Module

Power management control ECU

Comes on

Comes on

P0A1D-162

Hybrid Powertrain
Control Module

Power management control ECU

Comes on

Comes on

P0A1D-187

Hybrid Powertrain
Control Module

Power management control ECU

Comes on

Comes on

P0A1D-721

Hybrid Powertrain
Control Module

Power management control ECU

Comes on

Comes on

P0A1D-722

Hybrid Powertrain
Control Module

Power management control ECU

Comes on

Comes on

P0A1D-723

Hybrid Powertrain
Control Module

Power management control ECU

Comes on

Comes on

P0A1D-787

Hybrid Powertrain
Control Module

Power management control ECU

Comes on

Comes on

P0A1D-818

Hybrid Powertrain
Control Module

Power management control ECU

Comes on

Comes on

P0A1D-821

Hybrid Powertrain
Control Module

Power management control ECU

Comes on

Comes on

Page 49 of 112

2010 Prius Diagnostic Trouble Code Chart

DTC CODE

DETECTION ITEM

TROUBLE AREA

MASTER

WARNING

LIGHT

MIL

P0A1D-822

Hybrid Powertrain
Control Module

Power management control ECU

Comes on

Comes on

P0A1D-823

Hybrid Powertrain
Control Module

Power management control ECU

Comes on

Comes on

P0A2B-250

Drive Motor "A"
Temperature Sensor
Circuit Range /
Performance

Hybrid vehicle transaxle assembly
(Motor temperature sensor)

Comes on

-

P0A2C-247

Drive Motor "A"
Temperature Sensor
Circuit Low

- Wire harness or connector

- Power management control ECU

- Hybrid vehicle transaxle assembly
(Motor temperature sensor)

Comes on

-

P0A2D-249

Drive Motor "A"
Temperature Sensor
Circuit High

- Wire harness or connector

- Power management control ECU

- Hybrid vehicle transaxle assembly
(Motor temperature sensor)

Comes on

­P0A2E-248

Drive Motor "A"
Temperature Sensor
Circuit Intermittent

Hybrid vehicle transaxle assembly
(Motor temperature sensor)

Comes on

-

P0A37-260

Generator Temperature
Sensor Circuit Range /
Performance

Hybrid vehicle transaxle assembly
(Generator temperature sensor)

Comes on

-

P0A38-257

Generator Temperature
Sensor Circuit Low

- Wire harness or connector

- Power management control ECU

- Hybrid vehicle transaxle assembly

(Generator temperature sensor)

Comes on

-

P0A39-259

Generator Temperature
Sensor Circuit High

- Wire harness or connector

- Power management control ECU

- Hybrid vehicle transaxle assembly

(Generator temperature sensor)

Comes on

-

P0A3A-258

Generator Temperature
Sensor Circuit
Intermittent

Hybrid vehicle transaxle assembly
(Generator temperature sensor)

Comes on

-

Page 50 of 112

2010 Prius Diagnostic Trouble Code Chart

DTC CODE

DETECTION ITEM

TROUBLE AREA

MASTER

WARNING

LIGHT

MIL

P0A3F-243

Drive Motor "A" Position
Sensor Circuit

- Inverter with converter assembly

- Hybrid vehicle transaxle assembly

- Wire harness or connector

Comes on

Comes on

P0A40-500

Drive Motor "A" Position
Sensor Circuit Range /
Performance

- Inverter with converter assembly

- Hybrid vehicle transaxle assembly

- Wire harness or connector

Comes on

Comes on

P0A41-245

Drive Motor "A" Position
Sensor Circuit Low

- Inverter with converter assembly

- Hybrid vehicle transaxle assembly

- Wire harness or connector

Comes on

Comes on

P0A4B-253

Generator Position
Sensor Circuit

- Inverter with converter assembly

- Hybrid vehicle transaxle assembly

- Wire harness or connector

Comes on

Comes on

P0A4C-513

Generator Position
Sensor Circuit Range /
Performance

- Inverter with converter assembly

- Hybrid vehicle transaxle assembly

- Wire harness or connector

Comes on

Comes on

P0A4D-255

Generator Position
Sensor Circuit Low

- Inverter with converter assembly

- Hybrid vehicle transaxle assembly

- Wire harness or connector

Comes on

Comes on

P0A51-174

Drive Motor "A" Current
Sensor Circuit

Inverter with converter assembly

Comes on

-

P0A60-288

Drive Motor "A" Phase V
Current

Inverter with converter assembly

Comes on

Comes on

P0A60-290

Drive Motor "A" Phase V
Current

Inverter with converter assembly

Comes on

Comes on

P0A60-294

Drive Motor "A" Phase V
Current

Inverter with converter assembly

Comes on

Comes on

P0A60-501

Drive Motor "A" Phase V
Current

Inverter with converter assembly

Comes on

Comes on

P0A63-296

Drive Motor "A" Phase W
Current

Inverter with converter assembly

Comes on

Comes on

Page 51 of 112

2010 Prius Diagnostic Trouble Code Chart

DTC CODE

DETECTION ITEM

TROUBLE AREA

MASTER

WARNING

LIGHT

MIL

P0A63-298

Drive Motor "A" Phase W
Current

Inverter with converter assembly

Comes on

Comes on

P0A63-302

Drive Motor "A" Phase W
Current

Inverter with converter assembly

Comes on

Comes on

P0A63-502

Drive Motor "A" Phase W
Current

Inverter with converter assembly

Comes on

Comes on

P0A72-326

Generator Phase V
Current

Inverter with converter assembly

Comes on

Comes on

P0A72-328

Generator Phase V
Current

Inverter with converter assembly

Comes on

Comes on

P0A72-333

Generator Phase V
Current

Inverter with converter assembly

Comes on

Comes on

P0A72-515

Generator Phase V
Current

Inverter with converter assembly

Comes on

Comes on

P0A75-334

Generator Phase W
Current

Inverter with converter assembly

Comes on

Comes on

P0A75-336

Generator Phase W
Current

Inverter with converter assembly

Comes on

Comes on

P0A75-341

Generator Phase W
Current

Inverter with converter assembly

Comes on

Comes on

P0A75-516

Generator Phase W
Current

Inverter with converter assembly

Comes on

Comes on

P0A78-113

Drive Motor "A" Inverter
Performance

- Hybrid vehicle transaxle assembly

- Generator cable

- Motor cable

- Inverter with converter assembly

- Power management control ECU

- PCU fuse

- Wire harness or connector

Comes on

Comes on

Page 52 of 112

2010 Prius Diagnostic Trouble Code Chart

DTC CODE

DETECTION ITEM

TROUBLE AREA

MASTER

WARNING

LIGHT

MIL

P0A78-121

Drive Motor "A" Inverter
Performance

- Hybrid battery junction block

- Inverter with converter assembly

- Service plug grip (EV battery fuse)

- Frame wire

- Hybrid vehicle transaxle assembly

- Generator cable

- Motor cable

- Power management control ECU

- PCU fuse

- Wire harness or connector

Comes on

Comes on

P0A78-128

Drive Motor "A" Inverter
Performance

- Hybrid vehicle transaxle assembly

- Generator cable

- Motor cable

- Inverter with converter assembly

- Power management control ECU

- PCU fuse

- Wire harness or connector

Comes on

Comes on

P0A78-202

Drive Motor "A" Inverter
Performance

- Inverter with converter assembly

- Hybrid vehicle transaxle assembly

- Motor cable

Comes on

Comes on

P0A78-266

Drive Motor "A" Inverter
Performance

Inverter with converter assembly

Comes on

Comes on

P0A78-267

Drive Motor "A" Inverter
Performance

Inverter with converter assembly

Comes on

Comes on

P0A78-279

Drive Motor "A" Inverter
Performance

Inverter with converter assembly

Comes on

Comes on

P0A78-282

Drive Motor "A" Inverter
Performance

Inverter with converter assembly

Comes on

Comes on

Page 53 of 112

2010 Prius Diagnostic Trouble Code Chart

DTC CODE

DETECTION ITEM

TROUBLE AREA

MASTER

WARNING

LIGHT

MIL

P0A78-284

Drive Motor "A" Inverter
Performance

- Inverter cooling system

- Cooling fan system

- Power management control ECU

- Inverter with converter assembly

- Hybrid vehicle transaxle assembly

- Generator cable

- Motor cable

- Water pump with motor assembly

- Wire harness or connector

- IGCT No. 3 fuse

- PCU fuse

Comes on

Comes on

P0A78-286

Drive Motor "A" Inverter
Performance

- Inverter cooling system

- Cooling fan system

- Power management control ECU

- Inverter with converter assembly

- Hybrid vehicle transaxle assembly

- Generator cable

- Motor cable

- Water pump with motor assembly

- Wire harness or connector

- IGCT No. 3 fuse

- PCU fuse

Comes on

Comes on

P0A78-287

Drive Motor "A" Inverter
Performance

Inverter with converter assembly

Comes on

Comes on

P0A78-306

Drive Motor "A" Inverter
Performance

- Hybrid vehicle transaxle assembly

- Motor cable

- Inverter with converter assembly

Comes on

Comes on

P0A78-503

Drive Motor "A" Inverter
Performance

Inverter with converter assembly

Comes on

Comes on

P0A78-504

Drive Motor "A" Inverter
Performance

- Inverter with converter assembly

- Hybrid vehicle transaxle assembly

- Wire harness or connector

Comes on

Comes on

Page 54 of 112

2010 Prius Diagnostic Trouble Code Chart

DTC CODE

DETECTION ITEM

TROUBLE AREA

MASTER

WARNING

LIGHT

MIL

P0A78-505

Drive Motor "A" Inverter
Performance

Inverter with converter assembly

Comes on

Comes on

P0A78-506

Drive Motor "A" Inverter
Performance

- Inverter with converter assembly

- Hybrid vehicle transaxle assembly

- Wire harness or connector

Comes on

Comes on

P0A78-510

Drive Motor "A" Inverter
Performance

Inverter with converter assembly

Comes on
until DTC
is cleared

Comes on

P0A78-565

Drive Motor "A" Inverter
Performance

Inverter with converter assembly

Comes on

Comes on

P0A78-586

Drive Motor "A" Inverter
Performance

Inverter with converter assembly

Comes on

Comes on

P0A78-806

Drive Motor "A" Inverter
Performance

Inverter with converter assembly

Comes on

Comes on

P0A78-807

Drive Motor "A" Inverter
Performance

Inverter with converter assembly

Comes on

Comes on

P0A78-808

Drive Motor "A" Inverter
Performance

- Inverter with converter assembly

- Hybrid vehicle transaxle assembly

- Wire harness or connector

Comes on

Comes on

P0A7A-122

Generator Inverter
Performance

- Power management control ECU

- Inverter with converter assembly

- Hybrid vehicle transaxle assembly

- Generator cable

- Motor cable

- Wire harness or connector

- PCU fuse

Comes on

Comes on

Page 55 of 112

2010 Prius Diagnostic Trouble Code Chart

DTC CODE

DETECTION ITEM

TROUBLE AREA

MASTER

WARNING

LIGHT

MIL

P0A7A-130

Generator Inverter
Performance

- Power management control ECU

- Inverter with converter assembly

- Hybrid vehicle transaxle assembly

- Generator cable

- Motor cable

- Wire harness or connector

- PCU fuse

Comes on

Comes on

P0A7A-203

Generator Inverter
Performance

- Inverter with converter assembly

- Hybrid vehicle transaxle assembly

- Generator cable

Comes on

Comes on

P0A7A-322

Generator Inverter
Performance

- Inverter cooling system

- Cooling fan system

- Power management control ECU

- Inverter with converter assembly

- Hybrid vehicle transaxle assembly

- Generator cable

- Motor cable

- Water pump with motor assembly

- Wire harness or connector

- IGCT No. 3 fuse

- PCU fuse

Comes on

Comes on

P0A7A-324

Generator Inverter
Performance

- Inverter cooling system

- Cooling fan system

- Power management control ECU

- Inverter with converter assembly

- Hybrid vehicle transaxle assembly

- Generator cable

- Motor cable

- Water pump with motor assembly

- Wire harness or connector

- IGCT No. 3 fuse

- PCU fuse

Comes on

Comes on

Page 56 of 112

2010 Prius Diagnostic Trouble Code Chart

DTC CODE

DETECTION ITEM

TROUBLE AREA

MASTER

WARNING

LIGHT

MIL

P0A7A-325

Generator Inverter
Performance

Inverter with converter assembly

Comes on

Comes on

P0A7A-344

Generator Inverter
Performance

- Hybrid vehicle transaxle assembly

- Generator cable

- Inverter with converter assembly

Comes on

Comes on
P0A7A-517

Generator Inverter
Performance

Inverter with converter assembly

Comes on

Comes on

P0A7A-518

Generator Inverter
Performance

- Inverter with converter assembly

- Hybrid vehicle transaxle assembly

- Wire harness or connector

Comes on

Comes on

P0A7A-522

Generator Inverter
Performance

Inverter with converter assembly

Comes on
until DTC
is cleared

Comes on
P0A7A-809

Generator Inverter
Performance

Inverter with converter assembly

Comes on

Comes on

P0A7A-810

Generator Inverter
Performance

Inverter with converter assembly

Comes on

Comes on

P0A7A-811

Generator Inverter
Performance

- Inverter with converter assembly

- Hybrid vehicle transaxle assembly

- Wire harness or connector

Comes on

Comes on

P0A90-251

Drive Motor "A"
Performance

- Hybrid vehicle transaxle assembly

- Motor cable

- Inverter with converter assembly

Comes on

Comes on

P0A90-509

Drive Motor "A"
Performance

- Hybrid vehicle transaxle assembly

- Motor cable

- Inverter with converter assembly

Comes on

Comes on

P0A92-261

Hybrid Generator
Performance

- Hybrid vehicle transaxle assembly

- Generator cable

- Inverter with converter assembly

Comes on

Comes on

Page 57 of 112

2010 Prius Diagnostic Trouble Code Chart

DTC CODE

DETECTION ITEM

TROUBLE AREA

MASTER

WARNING

LIGHT

MIL

P0A92-521

Hybrid Generator
Performance

- Hybrid vehicle transaxle assembly

- Generator cable

- Inverter with converter assembly

Comes on

Comes on

P0A93-346

Inverter Cooling System
Performance

- Wire harness or connector

- Inverter cooling system

- Water pump with motor assembly

- Power management control ECU

- Inverter with converter assembly

- Cooling fan system

- IGCT No. 3 fuse

Comes on

Comes on

P0A94-127

DC / DC Converter
Performance

- Hybrid battery junction block

- Inverter with converter assembly

- Service plug grip

- Frame wire

- Hybrid vehicle transaxle assembly

- Generator cable

- Motor cable

- Wire harness or connector

- PCU fuse

- Power management control ECU

Comes on

Comes on

P0A94-172

DC / DC Converter
Performance

- Wire harness or connector

- Hybrid vehicle transaxle assembly

- Generator cable

- Motor cable

- Inverter with converter assembly

- PCU fuse

- Power management control ECU

Comes on

Comes on

P0A94-442

DC / DC Converter
Performance

Inverter with converter assembly

Comes on

Comes on

P0A94-547

DC / DC Converter
Performance

Inverter with converter assembly

Comes on

Comes on

P0A94-548

DC / DC Converter
Performance

Inverter with converter assembly

Comes on

Comes on

Page 58 of 112

2010 Prius Diagnostic Trouble Code Chart

DTC CODE

DETECTION ITEM

TROUBLE AREA

MASTER

WARNING

LIGHT

MIL

P0A94-549

DC / DC Converter
Performance

- Wire harness or connector

- Inverter with converter assembly

- Hybrid vehicle transaxle assembly

Comes on

Comes on

P0A94-550

DC / DC Converter
Performance

Inverter with converter assembly

Comes on

Comes on

P0A94-553

DC / DC Converter
Performance

- Wire harness or connector

- Inverter cooling system

- Water pump with motor assembly

- Hybrid vehicle transaxle assembly

- Generator cable

- Motor cable

- Inverter with converter assembly

- Cooling fan circuit

- PCU fuse

- IGCT No. 3 fuse

- Power management control ECU

Comes on

Comes on

P0A94-554

DC / DC Converter
Performance

Inverter with converter assembly

Comes on

Comes on

P0A94-555

DC / DC Converter
Performance

Inverter with converter assembly

Comes on

Comes on

P0A94-556

DC / DC Converter
Performance

- Wire harness or connector

- Inverter with converter assembly

- Hybrid vehicle transaxle assembly

Comes on

Comes on

Page 59 of 112

2010 Prius Diagnostic Trouble Code Chart

DTC CODE

DETECTION ITEM

TROUBLE AREA

MASTER

WARNING

LIGHT

MIL

P0A94-557

DC / DC Converter
Performance

- Wire harness or connector

- Inverter cooling system

- Water pump with motor assembly

- Hybrid vehicle transaxle assembly

- Generator cable

- Motor cable

- Inverter with converter assembly

- Cooling fan circuit

- PCU fuse

- IGCT No. 3 fuse

- Power management control ECU

Comes on

Comes on

P0A94-564

DC / DC Converter
Performance

Inverter with converter assembly

Comes on

Comes on

P0A94-585

DC / DC Converter
Performance

Inverter with converter assembly

Comes on

Comes on

P0A94-587

DC / DC Converter
Performance

- Inverter with converter assembly

- Battery smart unit

Comes on

Comes on

P0A94-589

DC / DC Converter
Performance

Inverter with converter assembly

Comes on

Comes on

P0A94-590

DC / DC Converter
Performance

Inverter with converter assembly

Comes on

Comes on

P0AA1-231

Hybrid Battery Positive
Contactor Circuit Stuck
Closed

- Hybrid battery junction block

assembly

- Inverter with converter assembly

Comes on
until DTC
is cleared

-

P0AA1-233

Hybrid Battery Positive
Contactor Circuit Stuck
Closed

Hybrid battery junction block
assembly

Comes on
until DTC
is cleared

-

P0AA4-232

Hybrid Battery Negative
Contactor Circuit Stuck
Closed

- Hybrid battery junction block

assembly

- Inverter with converter assembly

Comes on
until DTC
is cleared

-

Page 60 of 112

2010 Prius Diagnostic Trouble Code Chart

DTC CODE

DETECTION ITEM

TROUBLE AREA

MASTER

WARNING

LIGHT

MIL

P0AA6-526

Hybrid Battery Voltage
System Isolation Fault

- Hybrid vehicle transaxle assembly

- Generator cable

- Motor cable

- Inverter with converter assembly

- Frame wire

- No. 2 engine wire

- Hybrid battery junction block

assembly

- Compressor with motor assembly

- HV battery

- Battery smart unit

Comes on
until DTC
is cleared

-

P0AA6-611

Hybrid Battery Voltage
System Isolation Fault

Compressor with motor assembly

Comes on
until DTC
is cleared

-

P0AA6-612

Hybrid Battery Voltage
System Isolation Fault

- Hybrid battery junction block

assembly

- Battery smart unit

- HV battery

Comes on
until DTC
is cleared

-

P0AA6-613

Hybrid Battery Voltage
System Isolation Fault

- Hybrid vehicle transaxle assembly

- Motor cable

- Generator cable

- Inverter with converter assembly

Comes on
until DTC
is cleared

-

P0AA6-614

Hybrid Battery Voltage
System Isolation Fault

- Inverter with converter assembly

- Frame wire

- Compressor with motor assembly

- No. 2 engine wire

- Hybrid battery junction block

assembly

- Hybrid vehicle transaxle assembly

- Motor cable

- Generator cable

Comes on
until DTC
is cleared

-

P0AA7-727

Hybrid Battery Voltage
Isolation Sensor Circuit

Battery smart unit

Comes on

-

Page 61 of 112

2010 Prius Diagnostic Trouble Code Chart

DTC CODE

DETECTION ITEM

TROUBLE AREA

MASTER

WARNING

LIGHT

MIL

P0AC0-817

Hybrid Battery Pack
Current Sensor Circuit
Range / Performance

- Hybrid battery junction block

assembly

- Battery smart unit

Comes on

Comes on

P0ADB-227

Hybrid Battery Positive
Contactor Control Circuit
Low

- Wire harness or connector

- Hybrid battery junction block

assembly

- Power management control ECU

Comes on

-

P0ADC-

226

Hybrid Battery Positive
Contactor Control Circuit
High

- Wire harness or connector

- Hybrid battery junction block

assembly

- Power management control ECU

Comes on

-

P0ADF-229

Hybrid Battery Negative
Contactor Control Circuit
Low

- Wire harness or connector

- Hybrid battery junction block

assembly

- Power management control ECU

Comes on

-

P0AE0-228

Hybrid Battery Negative
Contactor Control Circuit
High

- Wire harness or connector

- Hybrid battery junction block

assembly

- Power management control ECU

Comes on

­P0AE2-773

Hybrid Battery Precharge
Contactor Circuit Stuck
Closed

- Hybrid battery junction block

assembly

- Inverter with converter assembly

Comes on

-

P0AE6-225

Hybrid Battery Precharge
Contactor Control Circuit
Low

- Wire harness or connector

- Hybrid battery junction block

assembly

- Power management control ECU

Comes on

-

P0AE7-224

Hybrid Battery Precharge
Contactor Control Circuit
High

- Wire harness or connector

- Hybrid battery junction block

assembly

- Power management control ECU

Comes on

-

Page 62 of 112

2010 Prius Diagnostic Trouble Code Chart

DTC CODE

DETECTION ITEM

TROUBLE AREA

MASTER

WARNING

LIGHT

MIL

P0AEE-277

Motor Inverter
Temperature Sensor "A"
Circuit Range /
Performance

- Inverter cooling system

- Cooling fan system

- Power management control ECU

- Inverter with converter assembly

- Water pump with motor assembly

- Wire harness or connector

- IGCT No. 3 fuse

Comes on

-

P0AEF-275

Drive Motor Inverter
Temperature Sensor "A"
Circuit Low

Inverter with converter assembly

Comes on

-

P0AF0-274

Drive Motor Inverter
Temperature Sensor "A"
Circuit High

Inverter with converter assembly

Comes on

-

P0AF1-276

Drive Motor Inverter
Temperature Sensor "A"
Circuit Intermittent /
Erratic

- Inverter cooling system

- Cooling fan system

- Power management control ECU

- Inverter with converter assembly

- Water pump with motor assembly

- Wire harness or connector

- IGCT No. 3 fuse

Comes on

-

P0AFC-129

Hybrid Battery Pack
Sensor Module

Battery smart unit

Comes on

Comes on

P0AFC-150

Hybrid Battery Pack
Sensor Module

- Battery smart unit

- Wire harness or connector

- Fuse

- Relay

Comes on

Comes on

P0BCD-

315

Generator Inverter
Temperature Sensor
Circuit Range /
Performance

- Inverter cooling system

- Cooling fan system

- Power management control ECU

- Inverter with converter assembly

- Water pump with motor assembly

- Wire harness or connector

- IGCT No. 3 fuse

Comes on

-

Page 63 of 112

2010 Prius Diagnostic Trouble Code Chart

DTC CODE

DETECTION ITEM

TROUBLE AREA

MASTER

WARNING

LIGHT

MIL

P0BCE-313

Generator Inverter
Temperature Sensor
Circuit Low

Inverter with converter assembly

Comes on

-

P0BCF-312

Generator Inverter
Temperature Sensor
Circuit High

Inverter with converter assembly

Comes on

-

P0BD0-314

Generator Inverter
Temperature Sensor
Circuit Intermittent /
Erratic

- Inverter cooling system

- Cooling fan system

- Power management control ECU

- Inverter with converter assembly

- Water pump with motor assembly

- Wire harness or connector

- IGCT No. 3 fuse

Comes on

-

P0C30-390

Hybrid Battery Pack
State of Charge High

Power management control ECU

Comes on

-

P0C39-626

DC / DC Converter
Temperature Sensor "A"
Range / Performance

- Inverter cooling system

- Cooling fan system

- Power management control ECU

- Inverter with converter assembly

- Water pump with motor assembly

- Wire harness or connector

- IGCT No. 3 fuse

Comes on

-

P0C3A-621

DC / DC Converter
Temperature Sensor "A"
Low

Inverter with converter assembly

Comes on

-

P0C3B-622

DC / DC Converter
Temperature Sensor "A"
High

Inverter with converter assembly

Comes on

-

Page 64 of 112

2010 Prius Diagnostic Trouble Code Chart

DTC CODE

DETECTION ITEM

TROUBLE AREA

MASTER

WARNING

LIGHT

MIL

P0C3C-625

DC / DC Converter
Temperature Sensor "A"
Intermittent / Erratic

- Inverter cooling system

- Cooling fan system

- Power management control ECU

- Inverter with converter assembly

- Water pump with motor assembly

- Wire harness or connector

- IGCT No. 3 fuse

Comes on

-

P0C3E-628

DC / DC Converter
Temperature Sensor "B"
Range / Performance

- Inverter cooling system

- Cooling fan system

- Power management control ECU

- Inverter with converter assembly

- Water pump with motor assembly

- Wire harness or connector

- IGCT No. 3 fuse

Comes on

-

P0C3F-623

DC / DC Converter
Temperature Sensor "B"
Low

Inverter with converter assembly

Comes on

-

P0C40-624

DC / DC Converter
Temperature Sensor "B"
High

Inverter with converter assembly

Comes on

-

P0C41-627

DC / DC Converter
Temperature Sensor "B"
Intermittent / Erratic

- Inverter cooling system

- Cooling fan system

- Power management control ECU

- Inverter with converter assembly

- Water pump with motor assembly

- Wire harness or connector

- IGCT No. 3 fuse

Comes on

-

P0C73-776

Motor Electronics
Coolant Pump "A"
Control Performance

- Inverter cooling system

- Wire harness or connector

- Water pump with motor assembly

- Power management control ECU

Comes on

Comes on

Page 65 of 112

2010 Prius Diagnostic Trouble Code Chart

DTC CODE

DETECTION ITEM

TROUBLE AREA

MASTER

WARNING

LIGHT

MIL

P0C76-523

Hybrid Battery System
Discharge Time Too
Long

Inverter with converter assembly

Comes on

-

P1606-308

Collision Detection

- Airbag sensor assembly

- Power management control ECU

- Supplemental restraint systems

Comes on
until DTC
is cleared

-

P1606-317

Collision Detection

- Power management control ECU

- Supplemental restraint systems

Comes on
until DTC
is cleared

-

P181A-596

Gear Lever X Position
Circuit "A" / "B"
Correlation

- Wire harness or connector

- Shift lock control unit assembly

- Power management control ECU

Comes on

-

P181B-595

Gear Lever Y Position
Circuit "A" / "B"
Correlation

- Wire harness or connector

- Shift lock control unit assembly

- Power management control ECU

Comes on

-

P182B-577

Gear Lever X Position
"B" Circuit Low

- Wire harness or connector

- Shift lock control unit assembly

- Power management control ECU

Comes on

-

P182C-578

Gear Lever X Position
"B" Circuit High

- Wire harness or connector

- Shift lock control unit assembly

- Power management control ECU

Comes on

-

P182E-573

Gear Lever Y Position "B"
Circuit Low

- Wire harness or connector

- Shift lock control unit assembly

- Power management control ECU

Comes on

-

P182F-574

Gear Lever Y Position "B"
Circuit High

- Wire harness or connector

- Shift lock control unit assembly

- Power management control ECU

Comes on

-

P2120-152

Throttle / Pedal Position
Sensor / Switch "D"
Circuit

- Wire harness or connector

- Accelerator pedal assembly

- Power management control ECU

Comes on

-

Page 66 of 112

2010 Prius Diagnostic Trouble Code Chart

DTC CODE

DETECTION ITEM

TROUBLE AREA

MASTER

WARNING

LIGHT

MIL

P2121-106

Throttle / Pedal Position
Sensor / Switch "D"
Circuit Range /
Performance

- Wire harness or connector

- Accelerator pedal assembly

- Power management control ECU

Comes on

­P2122-104

Throttle / Pedal Position
Sensor / Switch "D"
Circuit Low Input

- Wire harness or connector

- Accelerator pedal assembly

- Power management control ECU

Comes on

-

P2123-105

Throttle / Pedal Position
Sensor / Switch "D"
Circuit High Input

- Wire harness or connector

- Accelerator pedal assembly

- Power management control ECU

Comes on

-

P2125-153

Throttle / Pedal Position
Sensor / Switch "E"
Circuit

- Wire harness or connector

- Accelerator pedal assembly

- Power management control ECU

Comes on

-

P2126-109

Throttle / Pedal Position
Sensor / Switch "E"
Circuit Range /
Performance

- Wire harness or connector

- Accelerator pedal assembly

- Power management control ECU

Comes on

­P2127-107

Throttle / Pedal Position
Sensor / Switch "E"
Circuit Low Input

- Wire harness or connector

- Accelerator pedal assembly

- Power management control ECU

Comes on

-

P2128-108

Throttle / Pedal Position
Sensor / Switch "E"
Circuit High Input

- Wire harness or connector

- Accelerator pedal assembly

- Power management control ECU

Comes on

-

P2138-110

Throttle / Pedal Position
Sensor / Switch "D" / "E"
Voltage Correlation

- Wire harness or connector

- Accelerator pedal assembly

- Power management control ECU

Comes on

-

P2138-154

Throttle / Pedal Position
Sensor / Switch "D" / "E"
Voltage Correlation

- Wire harness or connector

- Accelerator pedal assembly

- Power management control ECU

Comes on

­P2228-268

Barometric Pressure
Sensor "A" Circuit Low

Inverter with converter assembly

Comes on

-

Page 67 of 112

2010 Prius Diagnostic Trouble Code Chart

DTC CODE

DETECTION ITEM

TROUBLE AREA

MASTER

WARNING

LIGHT

MIL

P2229-269

Barometric Pressure
Sensor "A" Circuit High

Inverter with converter assembly

Comes on

-

P2511-149

ECM/PCM Power Relay
Sense Circuit
Intermittent

- Wire harness or connector

- Power management control ECU

Comes on

-

P2532-772

Ignition Switch Run
Position Circuit High

- Wire harness or connector

- Integration relay (IG2 relay)

- Power management control ECU

Comes on

­P3000-388

HV Battery Malfunction

- Fuel level

- HV battery

-

-

P3000-389

HV Battery Malfunction

- Engine

- Hybrid vehicle transaxle assembly

- HV battery

Comes on

­P3000-603

HV Battery Malfunction

- Power management control ECU

- HV battery

Comes on

-

P3004-131

Power Cable Malfunction

- Hybrid battery junction block

- Frame wire

- Inverter with converter assembly

- HV battery

- Wire harness or connector

Comes on

-

P3004-132

Power Cable Malfunction

- Hybrid battery junction block

assembly

- Frame wire

- Inverter with converter assembly

- Power management control ECU

- HV battery

- Wire harness or connector

Comes on

-

P3004-133

Power Cable Malfunction

Power management control ECU

Comes on

-

Page 68 of 112

2010 Prius Diagnostic Trouble Code Chart

DTC CODE

DETECTION ITEM

TROUBLE AREA

MASTER

WARNING

LIGHT

MIL

P3004-800

Power Cable Malfunction

- Wire harness or connector

- No. 2 engine wire

- Compressor with motor assembly

- Inverter with converter assembly

- Hybrid battery junction block

- Frame wire

- Power management control ECU

Comes on

-

P3004-801

Power Cable Malfunction

- Wire harness or connector

- No. 2 engine wire

- Compressor with motor assembly

- Inverter with converter assembly

- Hybrid battery junction block

- Frame wire

- Power management control ECU

Comes on

-

P3004-803

Power Cable Malfunction

- Hybrid battery junction block

assembly

- Wire harness or connector

Comes on

-

P3107-213

Airbag ECU
Communication Circuit
Malfunction

- Wire harness or connector

- Airbag sensor assembly

- Power management control ECU

Comes on

-

P3107-214

Airbag ECU
Communication Circuit
Malfunction

- Wire harness or connector

- Airbag sensor assembly

- Power management control ECU

Comes on

-

P3107-215

Airbag ECU
Communication Circuit
Malfunction

- Wire harness or connector

- Airbag sensor assembly

- Power management control ECU

Comes on

-

P3108-536

A/C Amplifier
Communication Circuit
Malfunction

- Wire harness or connector

- Compressor with motor assembly

- Power management control ECU

-

-

P3110-223

IGCT Relay Malfunction

- Wire harness or connector

- IGCT relay

- Power management control ECU

Comes on

-

Page 69 of 112

2010 Prius Diagnostic Trouble Code Chart

DTC CODE

DETECTION ITEM

TROUBLE AREA

MASTER

WARNING

LIGHT

MIL

P3147-239

Transmission Malfunction

- Engine

- Hybrid vehicle transaxle assembly

- Wire harness or connector

- Power management control ECU

- Transmission input damper

Comes on

-

P3147-240

Transmission Malfunction

Hybrid vehicle transaxle assembly

Comes on

-

P3147-241

Transmission Malfunction

- Engine

- Hybrid vehicle transaxle assembly

- Wire harness or connector

- Power management control ECU

- Transmission input damper

Comes on

-

P3147-242

Transmission Malfunction

Hybrid vehicle transaxle assembly

Comes on

-

P314A-828

Inverter Coolant Pump
Speed Signal

- Wire harness or connector

- Power management control ECU

- Water pump with motor assembly

- IGCT No. 3 fuse

Comes on

Comes on

P3232-749

Open or Short to B+ in
Blocking of HV Gate
Connection

- Wire harness or connector

- Power management control ECU

- Inverter with converter assembly

Comes on

-

P3233-750

Short to B+ in Blocking
of HV Gate Connection

- Wire harness or connector

- Power management control ECU

- Inverter with converter assembly

Comes on

-

P324E-788

MG-ECU Power Relay
Intermittent Circuit

- Wire harness or connector

- Inverter with converter assembly

- Engine room junction block

assembly

- Power management control ECU

Comes on

-

U0100-211

Lost Communication
with ECM / PCM "A"

CAN communication system

Comes on

Comes on

U0100-212

Lost Communication
with ECM / PCM "A"

CAN communication system

Comes on

Comes on

Page 70 of 112

2010 Prius Diagnostic Trouble Code Chart

DTC CODE

DETECTION ITEM

TROUBLE AREA

MASTER

WARNING

LIGHT

MIL

U0100-530

Lost Communication
with ECM / PCM "A"

CAN communication system

Comes on

Comes on

U0110-159

Lost Communication
with Driver Motor
Control Module

- Wire harness or connector

- Inverter with converter assembly

- Power management control ECU

- PCU fuse

Comes on

-

U0110-160

Lost Communication
with Driver Motor
Control Module

- Wire harness or connector

- Inverter with converter assembly

- Generator cable

- Motor cable

- Hybrid vehicle transaxle assembly

- Power management control ECU

Comes on

-

U0110-656

Lost Communication
with Driver Motor
Control Module

- Wire harness or connector

- Inverter with converter assembly

- Power management control ECU

- PCU fuse

Comes on

-

U0110-657

Lost Communication
with Driver Motor
Control Module

- Wire harness or connector

- Inverter with converter assembly

- Power management control ECU

- PCU fuse

Comes on

-

U0129-220

Lost Communication
with Brake System
Control Module

CAN communication system

Comes on

-

U0129-222

Lost Communication
with Brake System
Control Module

CAN communication system

Comes on

-

U0129-527

Lost Communication
with Brake System
Control Module

CAN communication system

Comes on

-

U0129-528

Lost Communication
with Brake System
Control Module

CAN communication system

Comes on

-

Page 71 of 112

2010 Prius Diagnostic Trouble Code Chart

DTC CODE

DETECTION ITEM

TROUBLE AREA

MASTER

WARNING

LIGHT

MIL

U0140-146

Lost Communication
with Body Control
Module

CAN communication system

Comes on

-

U0151-763

Lost Communication
with Airbag ECU

CAN communication system

Comes on

-

U0164-594

Lost Communication
with A/C ECU

CAN communication system

- - U0164-827

Lost Communication
with A/C ECU

CAN communication system

-

-

U0424-537

Invalid Data Received
from HVAC Control
Module

Air conditioning amplifier assembly

- - U1107-436

Lost Communication
with Power Management
Module

CAN communication system

Comes on

-

Page 72 of 112

2010 Prius Diagnostic Trouble Code Chart

DTC CODE

DETECTION ITEM

TROUBLE AREA

C1A01

Driving Support ECU

- Driving support ECU

C1A02

Vehicle Information Not Obtained

- Driving support ECU

- Main body ECU

C1A05

Stop Light Switch Circuit

- Stop light switch assembly

- Stop light switch assembly circuit

- Harness or connector

- Driving support ECU

C1A06

Stop Light Switch Input Circuit

- Driving support ECU

C1A0C

Object Recognition Camera Region
Code Mismatch

- Lane recognition camera sensor assembly

- Driving support ECU

C1A20

Object Recognition ECU

- Lane recognition camera sensor assembly

- Driving support ECU

C1A22

Object Recognition Camera Incorrect
Axial Gap

- Lane recognition camera sensor assembly

- Driving support ECU

C1A23

Object Recognition Camera
Initialization Incomplete

- Lane recognition camera sensor assembly

- Driving support ECU

C1A45

Vehicle Speed Sensor

- Vehicle speed sensor

- Brake booster with master cylinder (skid

control ECU)

- CAN communication system

- Driving support ECU

C1A46

Yaw Rate Sensor

- Yaw rate sensor

- Brake booster with master cylinder (skid

control ECU)

- Driving support ECU

LANE-KEEPING ASSIST SYSTEM

HINT:

If a trouble code is displayed during the DTC check, inspect the trouble area listed for that code.

Lane-keeping Assist System

Page 73 of 112

2010 Prius Diagnostic Trouble Code Chart

DTC CODE

DETECTION ITEM

TROUBLE AREA

C1A4A

Skid Control Buzzer Circuit

- Skid control buzzer

- Skid control buzzer circuit

- Brake booster with master cylinder (skid

control ECU)

- Driving support ECU

C1A70

Power Steering Control System

- Power steering system

- CAN communication system

- Driving support ECU

C1A71

Power Steering Control Torque

- Power steering system

- CAN communication system

- Driving support ECU

U0122

Lost Communication with Vehicle
Dynamics Control Module

- Brake booster with master cylinder (skid

control ECU)

- CAN communication system

- Driving support ECU

U0123

Lost Communication with Yaw Rate
Sensor Module

- Yaw rate sensor

- CAN communication system

- Driving support ECU

U0131

Lost Communication with Power
Steering Control Module

- Power steering control ECU

- CAN communication system

- Driving support ECU

U1104

Lost Communication with Driving
Support ECU

- Driving support ECU

- CAN communication system

- Brake booster with master cylinder (skid

control ECU)

- Lane recognition camera sensor assembly

- Power steering control ECU

U1119

Lost Communication with Object
Recognition ECU (CAN)

- Lane recognition camera sensor assembly

- CAN communication system

- Driving support ECU

- Harness or connector

Page 74 of 112

2010 Prius Diagnostic Trouble Code Chart

DTC CODE

DETECTION ITEM

TROUBLE AREA

B1206

P/W Master Switch Communication
Stop

1. Multiplex network master switch assembly

2. Main body ECU (multiplex network body ECU)

3. Instrument panel junction block assembly

4. Wire harness or connector

5. D FR DOOR fuse

B1273

*1

Sliding Roof ECU Communication Stop

1. Sliding roof ECU (sliding roof drive gear sub-

assembly)

2. Main body ECU (multiplex network body ECU)

3. Instrument panel junction block assembly

4. Wire harness or connector

5. S/ROOF fuse

B2321

Driver Side Door ECU Communication
Stop

1. Power window regulator motor assembly (for

driver side)

2. Main body ECU (multiplex network body ECU)

3. Multiplex network master switch assembly

4. Wire harness or connector

5. D FR DOOR fuse

B2322

Front Passenger Side Door ECU
Communication Stop

1. Power window regulator motor assembly (for

front passenger side)

2. Main body ECU (multiplex network body ECU)

3. Instrument panel junction block assembly

4. Wire harness or connector

5. P FR DOOR fuse

B2323

Rear Door RH ECU Communication
Stop

1. Power window regulator motor assembly (for

rear RH side)

2. Main body ECU (multiplex network body ECU)

3. Instrument panel junction block assembly

4. Wire harness or connector

5. DOOR RR fuse

LIN COMMUNICATION SYSTEM

Main Body ECU (Multiplex Network Body ECU)

Page 75 of 112

2010 Prius Diagnostic Trouble Code Chart

DTC CODE

DETECTION ITEM

TROUBLE AREA

B2324

Rear Door LH ECU Communication
Stop

1. Power window regulator motor assembly (for

rear LH side)

2. Main body ECU (multiplex network body ECU)

3. Instrument panel junction block assembly

4. Wire harness or connector

5. DOOR RL fuse

B2325

LIN Communication Bus Malfunction

1. Power window regulator motor assembly (for

driver side)

2. Power window regulator motor assembly (for

front passenger side)

3. Power window regulator motor assembly (for

rear RH side)

4. Power window regulator motor assembly (for

rear LH side)

5. Multiplex network master switch assembly

6. Sliding roof ECU (sliding roof drive gear sub-

assembly)*1

7. Main body ECU (multiplex network body ECU)

8. Instrument panel junction block assembly

9. Wire harness or connector

*1: w/ Moonroof with Solar Panel

Page 76 of 112

2010 Prius Diagnostic Trouble Code Chart

DTC CODE

DETECTION ITEM

TROUBLE AREA

B2785

Communication Malfunction between
ECUs Connected by LIN

1. Certification ECU (smart key ECU assembly)

2. Power management control ECU

3. Transmission control ECU assembly

4. ID code box (immobiliser code ECU)*3

5. Wire harness or connector

B2786

*2

No Response from Steering Lock ECU

1. Transmission control ECU assembly

2. Certification ECU (smart key ECU assembly)

3. Wire harness or connector

4. P CON MAIN fuse

B2789

*3

No Response from ID BOX

1. ID code box (immobiliser code ECU)

2. Certification ECU (smart key ECU assembly)

3. Wire harness or connector

4. ECU-B2 fuse

B278C

Lost Communication with Power
Source Control

1. Power management control ECU

2. Certification ECU (smart key ECU assembly)

3. Wire harness or connector

4. AM2 fuse

DTC CODE

DETECTION ITEM

TROUBLE AREA

B2287

LIN Communication Master
Malfunction

1. Power management control ECU

2. Certification ECU (smart key ECU assembly)

3. Wire harness or connector

Certification ECU (Smart Key ECU Assembly)

*2: Although "No Response from Steering Lock ECU" is displayed on the tester, this message is shown
if the certification ECU (smart key ECU assembly) cannot communicate with the transmission control
ECU assembly.

*3: w/ Automatic Light Control System

Power Management Control ECU

Page 77 of 112

2010 Prius Diagnostic Trouble Code Chart

Page 78 of 112

2010 Prius Diagnostic Trouble Code Chart

DTC CODE

DETECTION ITEM

TROUBLE AREA

B1561

XM Tuner Disconnected (Command
Line)

1. Stereo component tuner assembly power

source circuit

2. AVC-LAN circuit between navigation receiver

assembly and stereo component tuner assembly

3. Navigation receiver assembly

4. Stereo component tuner assembly

B1562

XM Tuner Disconnected (Burst Mode)

1. AVC-LAN plus circuit between display and

navigation assembly and stereo component
tuner assembly

2. Stereo component tuner assembly

3. Navigation receiver assembly

B1582

Map Disk Reading Malfunction

1. Map disc

2. Navigation receiver assembly

B1593

No Response from Stereo Component
Amplifier

1. Stereo component amplifier assembly power

source circuit

2. AVC-LAN circuit between navigation receiver

assembly and stereo component amplifier
assembly

3. Navigation receiver assembly

4. Stereo component amplifier assembly

B159F

No Response from XM Tuner

1. Stereo component tuner assembly power

source circuit

2. AVC-LAN circuit between navigation receiver

assembly and stereo component tuner assembly

3. Navigation receiver assembly

4. Stereo component tuner assembly

B15A0

LAN Master Malfunction

Navigation receiver assembly

B15A3

Stereo Component Amplifier
Malfunction

Stereo component amplifier assembly

B15AD

Navigation Processor Malfunction

Navigation receiver assembly

B15B0

Display Screen Malfunction

Navigation receiver assembly

NAVIGATION SYSTEM

Navigation System

Page 79 of 112

2010 Prius Diagnostic Trouble Code Chart

DTC CODE

DETECTION ITEM

TROUBLE AREA

B15B3

Radio Tuner Malfunction

Navigation receiver assembly

B15B7

Bluetooth Module Malfunction

Navigation receiver assembly

B15BA

XM Tuner Malfunction

Stereo component tuner assembly

B15C0

Short in GPS Antenna

1. Wire harness

2. Navigation antenna assembly

3. Navigation receiver assembly

B15C1

Open in GPS Antenna

1. Wire harness

2. Navigation antenna assembly

3. Navigation receiver assembly

B15C2

Speed Signal Malfunction

1. Combination meter assembly (No. 3 meter

circuit plate)

2. Wire harness or connector

3. No. 4 junction block

4. No. 3 junction block

5. Navigation receiver assembly

B15D3

Stereo Component Amplifier
Disconnected

1. Stereo component amplifier assembly power

source circuit

2. AVC-LAN circuit between navigation receiver

assembly and stereo component amplifier
assembly

3. Navigation receiver assembly

4. Stereo component amplifier assembly

B15D8

Monitor Disconnected

1. Parking assist ECU power source circuit

2. AVC-LAN circuit between navigation receiver

assembly and parking assist ECU

3. Parking assist ECU

4. Navigation receiver assembly

B15E1

Media Malfunction

1. CD

2. Navigation receiver assembly

B15FE

XM Tuner Antenna Disconnected

1. Amplifier antenna assembly (satellite radio

antenna)

2. Stereo component tuner assembly

Page 80 of 112

2010 Prius Diagnostic Trouble Code Chart

DTC CODE

DETECTION ITEM

TROUBLE AREA

B15FF

XM Tuner Antenna Short

1. Amplifier antenna assembly (satellite radio

antenna)

2. Stereo component tuner assembly

U0073

Control Module Communication Bus
OFF

CAN communication system

Page 81 of 112

2010 Prius Diagnostic Trouble Code Chart

Page 82 of 112

2010 Prius Diagnostic Trouble Code Chart

DTC CODE

DETECTION ITEM

TROUBLE AREA

C1622

Open or Short Circuit in Back Camera
Signal

1. Harness or connector

2. Navigation receiver assembly

3. Rear television camera assembly

REAR VIEW MONITOR SYSTEM (w/ Navigation System)

HINT:

If a trouble code is output during the DTC check, inspect the trouble areas listed for that
code. Inspect fuses and relays before investigating the trouble areas shown in the table
below.

Rear View Monitor System (w/ Navigation System)

Page 83 of 112

2010 Prius Diagnostic Trouble Code Chart

Page 84 of 112

2010 Prius Diagnostic Trouble Code Chart

DTC CODE

DETECTION ITEM

TROUBLE AREA

B1570

Manual (SOS) Switch Red Indicator
Malfunction

1. Map light assembly

2. Wire harness or connector

3. DCM (Telematics Transceiver)

B1571

Manual (SOS) Switch Green Indicator
Malfunction

1. Map light assembly

2. Wire harness or connector

3. DCM (Telematics Transceiver)

B1572

Telephone Microphone Error

1. Wire harness or connector

2. Telephone microphone assembly

3. Map light assembly

4. DCM (Telematics Transceiver)

B1573

Short in Telephone Antenna Circuit

1. DCM (Telematics Transceiver)

2. Telephone and GPS antenna assembly

3. Wire harness or connector (Telephone and

GPS antenna cord)

B15CB

Telematics Transceiver Antenna
Disconnected

1. DCM (Telematics Transceiver)

2. Telephone and GPS antenna assembly

3. Wire harness or connector (Telephone and

GPS antenna cord)

B1583

GPS Signal Unreceived

1. Telephone and GPS antenna assembly

2. DCM (Telematics Transceiver)

B15A8

Telematics Transceiver Malfunction

DCM (Telematics Transceiver)

B15C0

Short in GPS Antenna

1. DCM (Telematics Transceiver)

2. Wire harness or connector (Telephone and

GPS antenna cord)

3. Telephone and GPS antenna assembly

SAFETY CONNECT SYSTEM

HINT:

If a trouble code is stored during the DTC check, inspect the trouble areas listed for that code.

DCM (Telematics Transceiver)

Page 85 of 112

2010 Prius Diagnostic Trouble Code Chart

DTC CODE

DETECTION ITEM

TROUBLE AREA

B15C1

Open in GPS Antenna

1. DCM (Telematics Transceiver)

2. Wire harness or connector (Telephone and

GPS antenna cord)

3. Telephone and GPS antenna assembly

B15C4

Airbag Signal Malfunction/Not Input

1. Airbag system

2. Wire harness or connector

3. Center airbag sensor assembly

4. DCM (Telematics Transceiver)

B15C5

Manual Button Malfunction

1. DCM (Telematics Transceiver)

2. Map light assembly

3. Wire harness or connector

B15CC

Backup Battery Failure

1. Wire harness or connector

2. BUB (Back-Up Battery)

3. DCM (Telematics Transceiver)

B15EC

Backup Battery Degradation

BUB (Back-Up Battery)

Page 86 of 112

2010 Prius Diagnostic Trouble Code Chart

DTC CODE

DETECTION ITEM

TROUBLE AREA

MIL

MEMORY

DTC

FOR
MEXICO
MODELS

P0010

Camshaft Position "A"
Actuator Circuit (Bank

1)

- Open or short in camshaft
timing oil control valve
assembly circuit

- Camshaft timing oil
control valve assembly

- ECM

Comes on

DTC
stored

Applies

P0011

Camshaft Position "A" ­Timing Over-Advanced
or System Performance
(Bank 1)

- Valve timing

- Camshaft timing oil
control valve assembly

- Oil control valve filter

- Camshaft timing gear
assembly

- ECM

Comes on

DTC
stored

Applies

P0012

Camshaft Position "A" ­Timing Over-Retarded
(Bank 1)

- Valve timing

- Camshaft timing oil
control valve assembly

- Oil control valve filter

- Camshaft timing gear
assembly

- ECM

Comes on

DTC
stored

Applies

SFI SYSTEM

HINT:

Parameters listed in the chart may not be exactly the same as your readings due to the type
of instrument or other factors. If a trouble code is displayed during the DTC check, inspect
the trouble areas listed for that code.

SFI System

Page 87 of 112

2010 Prius Diagnostic Trouble Code Chart

DTC CODE

DETECTION ITEM

TROUBLE AREA

MIL

MEMORY

DTC

FOR
MEXICO
MODELS

P0016

Crankshaft Position ­Camshaft Position
Correlation (Bank 1
Sensor A)

- Valve timing

- Camshaft timing oil
control valve assembly

- Oil control valve filter

- Camshaft timing gear
assembly (for intake
camshaft)

- ECM

Comes on

DTC
stored

Applies

P0031

Oxygen (A/F) Sensor
Heater Control Circuit
Low (Bank 1 Sensor 1)

- Open in air fuel ratio
sensor (sensor 1) heater
circuit

- Air fuel ratio sensor heater
(sensor 1)

- ECM

Comes on

DTC
stored

Applies

P0032

Oxygen (A/F) Sensor
Heater Control Circuit
High (Bank 1 Sensor 1)

- Short in air fuel ratio
sensor (sensor 1) heater
circuit

- Air fuel ratio sensor heater
(sensor 1)

- ECM

Comes on

DTC
stored

Applies

P0037

Oxygen Sensor Heater
Control Circuit Low
(Bank 1 Sensor 2)

- Open in heated oxygen
sensor (sensor 2) heater
circuit

- Heated oxygen sensor
(sensor 2) heater

- ECM

Comes on

DTC
stored

Applies

P0038

Oxygen Sensor Heater
Control Circuit High
(Bank 1 Sensor 2)

- Short in heated oxygen
sensor (sensor 2) heater
circuit

- Heated oxygen sensor
(sensor 2) heater

- ECM

Comes on

DTC
stored

Applies

Page 88 of 112

2010 Prius Diagnostic Trouble Code Chart

DTC CODE

DETECTION ITEM

TROUBLE AREA

MIL

MEMORY

DTC

FOR
MEXICO
MODELS

P0101

Mass Air Flow Circuit
Range / Performance
Problem

- Mass air flow meter sub­assembly

- Intake system

- PCV hose connections

- EGR valve assembly

Comes on

DTC
stored

-

P0102

Mass or Volume Air
Flow Circuit Low Input

- Open or short in mass air
flow meter sub-assembly
circuit

- Mass air flow meter sub­assembly

- ECM

Comes on

DTC
stored

Applies

P0103

Mass or Volume Air
Flow Circuit High Input

- Open or short in mass air
flow meter sub-assembly
circuit

- Mass air flow meter sub­assembly

- ECM

Comes on

DTC
stored

Applies

P0106

Manifold Absolute
Pressure / Barometric
Pressure Circuit Range /
Performance Problem

- Intake system

- Manifold absolute pressure
sensor

Comes on

DTC
stored

-

P0107

Manifold Absolute
Pressure / Barometric
Pressure Circuit Low
Input

- Open or short in manifold
absolute pressure sensor
circuit

- Manifold absolute pressure
sensor

- ECM

Comes on

DTC
stored

Applies

P0108

Manifold Absolute
Pressure / Barometric
Pressure Circuit High
Input

- Open or short in manifold
absolute pressure sensor
circuit

- Manifold absolute pressure
sensor

- ECM

Comes on

DTC
stored

Applies

Page 89 of 112

2010 Prius Diagnostic Trouble Code Chart

DTC CODE

DETECTION ITEM

TROUBLE AREA

MIL

MEMORY

DTC

FOR
MEXICO
MODELS

P0111

Intake Air Temperature
Sensor Gradient Too
High

Mass air flow meter sub­assembly

Comes on

DTC
stored

-

P0112

Intake Air Temperature
Circuit Low Input

- Short in intake air
temperature sensor circuit

- Intake air temperature
sensor (built into mass air
flow meter sub-assembly)

- ECM

Comes on

DTC
stored

Applies

P0113

Intake Air Temperature
Circuit High Input

- Open in intake air
temperature sensor circuit

- Intake air temperature
sensor (built into mass air
flow meter sub-assembly)

- ECM

Comes on

DTC
stored

Applies

P0115

Engine Coolant
Temperature Circuit
Malfunction

- Open or short in engine
coolant temperature sensor
circuit

- Engine coolant
temperature sensor

- ECM

Comes on

DTC
stored

Applies

P0116

Engine Coolant
Temperature Circuit
Range / Performance
Problem

- Water inlet with
thermostat sub-assembly

- Engine coolant
temperature sensor

Comes on

DTC
stored

Applies

P0117

Engine Coolant
Temperature Circuit
Low Input

- Short in engine coolant
temperature sensor circuit

- Engine coolant
temperature sensor

- ECM

Comes on

DTC
stored

Applies

Page 90 of 112

2010 Prius Diagnostic Trouble Code Chart

DTC CODE

DETECTION ITEM

TROUBLE AREA

MIL

MEMORY

DTC

FOR
MEXICO
MODELS

P0118

Engine Coolant
Temperature Circuit
High Input

- Open in engine coolant
temperature sensor circuit

- Engine coolant
temperature sensor

- ECM

Comes on

DTC
stored

Applies

P011B

Engine Coolant
Temperature / Intake
Air Temperature
Correlation

- Intake air temperature
sensor

- Engine coolant
temperature sensor

- ECM

Comes on

DTC
stored

­P0120

Throttle / Pedal Position
Sensor / Switch "A"
Circuit Malfunction

- Throttle position sensor

(built into throttle body
assembly)

- ECM

Comes on

DTC
stored

Applies

P0121

Throttle / Pedal Position
Sensor / Switch "A"
Circuit Range /
Performance Problem

- Throttle position sensor

(built into throttle body
assembly)

- Throttle position sensor

circuit

- ECM

Comes on

DTC
stored

Applies

P0122

Throttle / Pedal Position
Sensor / Switch "A"
Circuit Low Input

- Throttle position sensor

(built into throttle body
assembly)

- Short in VTA1 circuit

- Open in VC circuit

- ECM

Comes on

DTC
stored

Applies

P0123

Throttle / Pedal Position
Sensor / Switch "A"
Circuit High Input

- Throttle position sensor

(built into throttle body
assembly)

- Open in VTA1 circuit

- Open in E2 circuit

- Short between VC and

VTA1 circuits

- ECM

Comes on

DTC
stored

Applies

Page 91 of 112

2010 Prius Diagnostic Trouble Code Chart

DTC CODE

DETECTION ITEM

TROUBLE AREA

MIL

MEMORY

DTC

FOR
MEXICO
MODELS

P0125

Insufficient Coolant
Temperature for Closed
Loop Fuel Control

- Cooling system

- Engine coolant
temperature sensor

- Water inlet with
thermostat sub-assembly

Comes on

DTC
stored

Applies

P0128

Coolant Thermostat
(Coolant Temperature
Below Thermostat
Regulating
Temperature)

- Water inlet with
thermostat sub-assembly

- Cooling system

- Engine coolant
temperature sensor

- ECM

Comes on

DTC
stored

Applies

P0136

Oxygen Sensor Circuit
Malfunction (Bank 1
Sensor 2)

- Open or short in heated
oxygen sensor (sensor 2)
circuit

- Heated oxygen sensor
(sensor 2)

- Heated oxygen sensor
heater (sensor 2)

- Air fuel ratio sensor
(sensor 1)

- Gas leaks from exhaust
system

- EGR valve assembly

Comes on

DTC
stored

-

P0137

Oxygen Sensor Circuit
Low Voltage (Bank 1
Sensor 2)

- Open or short in heated
oxygen sensor (sensor 2)

- Heated oxygen sensor
(sensor 2)

- Heated oxygen sensor
heater (sensor 2)

- Gas leak from exhaust
system

- EGR valve assembly

Comes on

DTC
stored

Applies

Page 92 of 112

2010 Prius Diagnostic Trouble Code Chart

DTC CODE

DETECTION ITEM

TROUBLE AREA

MIL

MEMORY

DTC

FOR
MEXICO
MODELS

P0138

Oxygen Sensor Circuit
High Voltage (Bank 1
Sensor 2)

- Short in heated oxygen
sensor (sensor 2) circuit

- Heated oxygen sensor
(sensor 2)

- EGR valve assembly

- ECM

- Air fuel ratio sensor
(sensor 1)

Comes on

DTC
stored

-

P0139

Oxygen Sensor Circuit
Slow Response (Bank 1
Sensor 2)

- Short in heated oxygen
sensor (sensor 2) circuit

- Heated oxygen sensor
(sensor 2)

- EGR valve assembly

- ECM

Comes on

DTC
stored

-

P0141

Oxygen Sensor Heater
Circuit Malfunction
(Bank 1 Sensor 2)

- Open or short in heated
oxygen sensor (sensor 2)
heater circuit

- Heated oxygen sensor
(sensor 2) heater

- ECM

Comes on

DTC
stored

-

Page 93 of 112

2010 Prius Diagnostic Trouble Code Chart

DTC CODE

DETECTION ITEM

TROUBLE AREA

MIL

MEMORY

DTC

FOR
MEXICO
MODELS

P0171

System Too Lean (Bank

1)

- Intake system

- Fuel injector assembly

- Mass air flow meter sub­assembly

- Engine coolant
temperature sensor

- Fuel pressure

- Gas leaks from exhaust
system

- Open or short in air fuel
ratio sensor (sensor 1)
circuit

- Air fuel ratio sensor
(sensor 1)

- PCV valve and hose

- PCV hose connections

- EGR valve assembly

- ECM

Comes on

DTC
stored

Applies

P0172

System Too Rich (Bank

1)

- Fuel injector assembly

- Mass air flow meter sub­assembly

- Engine coolant
temperature sensor

- Ignition system

- Fuel pressure

- Gas leaks from exhaust
system

- Open or short in air fuel
ratio sensor (sensor 1)
circuit

- Air fuel ratio sensor
(sensor 1)

- EGR valve assembly

- ECM

Comes on

DTC
stored

Applies

Page 94 of 112

2010 Prius Diagnostic Trouble Code Chart

DTC CODE

DETECTION ITEM

TROUBLE AREA

MIL

MEMORY

DTC

FOR
MEXICO
MODELS

P0220

Throttle / Pedal Position
Sensor / Switch "B"
Circuit

- Throttle position sensor
(built into throttle body
assembly)

- ECM

Comes on

DTC
stored

Applies

P0222

Throttle / Pedal Position
Sensor / Switch "B"
Circuit Low Input

- Throttle position sensor
(built into throttle body
assembly)

- Short in VTA2 circuit

- Open in VC circuit

- ECM

Comes on

DTC
stored

Applies

P0223

Throttle / Pedal Position
Sensor / Switch "B"
Circuit High Input

- Throttle position sensor
(built into throttle body
assembly)

- Open in VTA2 circuit

- Open in E2 circuit

- Short between VC and
VTA2 circuits

- ECM

Comes on

DTC
stored

Applies

Page 95 of 112

2010 Prius Diagnostic Trouble Code Chart

DTC CODE

DETECTION ITEM

TROUBLE AREA

MIL

MEMORY

DTC

FOR
MEXICO
MODELS

P0300

Random / Multiple
Cylinder Misfire
Detected

- Open or short in engine
wire harness

- Connector connection

- Vacuum hose connections

- Ignition system

- Fuel injector assembly

- Fuel pressure

- Mass air flow meter sub­assembly

- Engine coolant
temperature sensor

- Compression pressure

- Valve timing

- PCV valve and hose

- PCV hose connections

- Intake system

- EGR valve assembly

- ECM

Comes on
/ Blinks*1

DTC
stored

Applies

Page 96 of 112

2010 Prius Diagnostic Trouble Code Chart

DTC CODE

DETECTION ITEM

TROUBLE AREA

MIL

MEMORY

DTC

FOR
MEXICO
MODELS

P0301

Cylinder 1 Misfire
Detected

- Open or short in engine
wire harness

- Connector connection

- Vacuum hose connections

- Ignition system

- Fuel injector assembly

- Fuel pressure

- Mass air flow meter sub­assembly

- Engine coolant
temperature sensor

- Compression pressure

- Valve timing

- PCV valve and hose

- PCV hose connections

- Intake system

- EGR valve assembly

- ECM

Comes on
/ Blinks*1

DTC
stored

Applies

Page 97 of 112

2010 Prius Diagnostic Trouble Code Chart

DTC CODE

DETECTION ITEM

TROUBLE AREA

MIL

MEMORY

DTC

FOR
MEXICO
MODELS

P0302

Cylinder 2 Misfire
Detected

- Open or short in engine
wire harness

- Connector connection

- Vacuum hose connections

- Ignition system

- Fuel injector assembly

- Fuel pressure

- Mass air flow meter sub­assembly

- Engine coolant
temperature sensor

- Compression pressure

- Valve timing

- PCV valve and hose

- PCV hose connections

- Intake system

- EGR valve assembly

- ECM

Comes on
/ Blinks*1

DTC
stored

Applies

Page 98 of 112

2010 Prius Diagnostic Trouble Code Chart

DTC CODE

DETECTION ITEM

TROUBLE AREA

MIL

MEMORY

DTC

FOR
MEXICO
MODELS

P0303

Cylinder 3 Misfire
Detected

- Open or short in engine
wire harness

- Connector connection

- Vacuum hose connections

- Ignition system

- Fuel injector assembly

- Fuel pressure

- Mass air flow meter sub­assembly

- Engine coolant
temperature sensor

- Compression pressure

- Valve timing

- PCV valve and hose

- PCV hose connections

- Intake system

- EGR valve assembly

- ECM

Comes on
/ Blinks*1

DTC
stored

Applies

Page 99 of 112

2010 Prius Diagnostic Trouble Code Chart

DTC CODE

DETECTION ITEM

TROUBLE AREA

MIL

MEMORY

DTC

FOR
MEXICO
MODELS

P0304

Cylinder 4 Misfire
Detected

- Open or short in engine
wire harness

- Connector connection

- Vacuum hose connections

- Ignition system

- Fuel injector assembly

- Fuel pressure

- Mass air flow meter sub­assembly

- Engine coolant
temperature sensor

- Compression pressure

- Valve timing

- PCV valve and hose

- PCV hose connections

- Intake system

- EGR valve assembly

- ECM

Comes on
/ Blinks*1

DTC
stored

Applies

P0327

Knock Sensor 1 Circuit
Low Input (Bank 1 or
Single Sensor)

- Short in knock control
sensor circuit

- Knock control sensor

- ECM

Comes on

DTC
stored

Applies

P0328

Knock Sensor 1 Circuit
High Input (Bank 1 or
Single Sensor)

- Open in knock control
sensor circuit

- Knock control sensor

- ECM

Comes on

DTC
stored

Applies

P0335

Crankshaft Position
Sensor "A" Circuit

- Open or short in
crankshaft position sensor
circuit

- Crankshaft position sensor

- No. 1 crankshaft position
sensor plate

- ECM

Comes on

DTC
stored

Applies

Page 100 of 112