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1/27/2021 DTC P0335 or P0336 - 3.6L LLT • 2016 Buick Enclave - AWD • MotoLogic
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DTC P0335
DTC P0336
DTC P0335 or P0336 - 3.6L LLT
Diagnostic Instructions
Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.
Review Strategy Based Diagnosis for an overview of the diagnostic approach.
Diagnostic Procedure Instructions provides an overview of each diagnostic category.
DTC Descriptors
Crankshaft Position Sensor Circuit
Crankshaft Position Sensor Performance
Diagnostic Fault Information
Circuit/System Description
The crankshaft position sensor circuits consist of an engine control module (ECM) supplied 5 V reference circuit, low reference circuit, and
an output signal circuit. The crankshaft position sensor is an internally magnetic biased digital output integrated circuit sensing device. The
sensor detects magnetic flux changes of the teeth and slots of a 58-tooth reluctor wheel on the crankshaft. Each tooth on the reluctor
wheel is spaced at 60-tooth spacing, with 2 missing teeth for the reference gap. The crankshaft position sensor produces an ON/OFF DC
voltage of varying frequency, with 58 output pulses per crankshaft revolution. The frequency of the crankshaft position sensor output
depends on the velocity of the crankshaft. The crankshaft position sensor sends a digital signal, which represents an image of the
crankshaft reluctor wheel, to the ECM as each tooth on the wheel rotates past the crankshaft position sensor. The ECM uses each
crankshaft position signal pulse to determine crankshaft speed and decodes the crankshaft reluctor wheel reference gap to identify
crankshaft position. This information is then used to determine the optimum ignition and injection points of the engine. The ECM also uses
crankshaft position sensor output information to determine the camshaft relative position to the crankshaft, to control camshaft phasing,
and to detect cylinder misfire.
Conditions for Running the DTC
P0335 Condition 1
The starter is engaged and the engine control module detects camshaft position sensor pulses.
Or
Circuit Short to Ground
Open/High
Resistance Short to Voltage
Signal
Performance
5 V Reference
P057C, P0335,
P0651
P0335 P0651 P0336
Signal P0335, P0506 P0335 P0335 P0336
Low Reference — P0335 — P0336
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DTCs P0101, P0102 and P0103 are not set.
And
The airflow into the engine is greater than 3 g/s.
Condition 2
DTC P0651 is not set.
The engine is running and the starter is not engaged.
Condition 3
DTCs P0365, P0366, P0641, and P0651 are not set.
The engine is running or the starter is engaged.
P0336 Condition 1
DTCs P0335 or P0651 are not set.
The airflow into the engine is greater than 3 g/s.
Engine speed is greater than 450 RPM.
Condition 2
DTC P0651 is not set.
The engine is running and the starter is not engaged.
Condition 3
The starter is engaged and the engine control module detects camshaft position sensor pulses.
Or
DTCs P0101, P0102, and P0103 are not set.
The airflow into the engine is greater than 3 g/s.
Condition 4
DTCs P0365, P0366, P0641, and P0651, are not set.
The engine is running or the starter is engaged.
The DTCs run continuously once the above conditions are met.
Conditions for Setting the DTC
P0335 Condition 1
The ECM does not detect a crankshaft position sensor pulse for greater than 4 s.
Condition 2
The ECM does not detect a crankshaft position sensor pulse for greater than 1.0 s.
Condition 3
The ECM does not detect a crankshaft position sensor pulse for 2 out of 10 engine revolutions.
P0336 Condition 1
The ECM detects that 10 or more crankshaft resynchronization have occurred within 10.0 s.
Condition 2
The ECM does not detect the synchronization gap on the reluctor wheel for greater than 0.4 s.
Condition 3
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The ECM does not detect the synchronization gap on the reluctor wheel for 1.5 s after the starter was engaged.
Condition 4
The ECM detects less than 51 or greater than 65 crankshaft position sensor pulses during 1 engine revolution for 8 out of 10 engine
revolutions.
Action Taken When the DTC Sets
DTCs P0335 and P0336 are Type A DTCs.
An engine driveability issue occurs after the first failure.
The camshaft position sensor is used to determine engine position.
The camshaft actuators are commanded to the parked position.
Conditions for Clearing the DTC
DTCs P0335 and P0336 are Type A DTCs.
Reference Information
Schematic Reference
Engine Controls Schematics
Connector End View Reference
Component Connector End Views
Description and Operation
Electronic Ignition System Description
Electrical Information Reference
Circuit Testing
Connector Repairs
Testing for Intermittent Conditions and Poor Connections
Wiring Repairs
DTC Type Reference
Powertrain Diagnostic Trouble Code (DTC) Type Definitions
Scan Tool Reference
Control Module References for scan tool information
Circuit/System Verification
1. Ignition ON.
2. Verify DTC P0651 is not set.
⇒ If the DTC is set
Refer to DTC P0641, P0651, P0697, or P06A3.
⇓ If the DTC is not set
Engine running.
Verify the scan tool Crankshaft Position Active Counter parameter increments.
⇒ If the counter does not increment
Refer to Circuit/System Testing.
⇓ If the counter increments
Verify the scan tool Crankshaft Position Resync Counter parameter displays 0 counts and the engine does not stumble or stall while
moving the related harness/connectors of the B26 Crankshaft Position Sensor.
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⇒ If greater than 0 counts and the engine stumbles or stalls
Refer to Circuit/System Testing.
⇓ If 0 counts and the engine does not stumble or stall
Operate the vehicle within the Conditions for Running the DTC. You may also operate the vehicle within the conditions that you
observed from the Freeze Frame/Failure Records data.
Verify the DTC does not set.
⇒ If the DTC sets
Refer to Circuit/System Testing.
⇓ If the DTC does not set
All OK.
Circuit/System Testing
1. Ignition OFF and all vehicle systems OFF, disconnect the harness connector at the B26 Crankshaft Position Sensor. It may take up
to 2 minutes for all vehicle systems to power down.
2. Test for less than 5 Ω between the low reference circuit terminal 2/B and ground.
⇒ If 5 Ω or greater
1. Ignition OFF, disconnect the X3 harness connector at the K20 Engine Control Module.
2. Test for less than 2 Ω in the low reference circuit end to end.
⇒ If 2 Ω or greater, repair the open/high resistance in the circuit.
⇒ If 2 Ω or less, replace the K20 Engine Control Module.
⇓ If less than 5 Ω
Ignition ON.
Test for 4.8–5.2 V between the 5 V reference circuit terminal 1/A and ground.
⇒ If less than 4.8 V
1. Ignition OFF, disconnect the X3 harness connector at the K20 Engine Control Module.
2. Test for infinite resistance between the 5 V reference circuit and ground.
⇒ If less than infinite resistance, repair the short to ground on the circuit.
⇓ If infinite resistance
Test for less than 2 Ω in the 5 V reference circuit end to end.
⇒ If 2 Ω or greater, repair the open/high resistance in the circuit.
⇒ If less than 2 Ω, replace the K20 Engine Control Module.
⇒ If greater than 5.2 V
1. Ignition OFF, disconnect the X3 harness connector at the K20 Engine Control Module, ignition ON.
2. Test for less than 1 V between the 5 V reference and ground.
⇒ If 1 V or greater, repair the short to voltage on the circuit.
⇒ If less than 1 V, replace the K20 Engine Control Module.
⇓ If between 4.8–5.2 V
Test for 4.8–5.2 V between the signal circuit terminal 3/C and ground.
⇒ If less than 4.8 V
1. Ignition OFF, disconnect the X3 harness connector at the K20 Engine Control Module.
2. Test for infinite resistance between the signal circuit and ground.
⇒ If less than infinite resistance, repair the short to ground on the circuit.
⇓ If infinite resistance.
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Test for less than 2 Ω in the signal circuit end to end.
⇒ If 2 Ω or greater, repair the open/high resistance in the circuit.
⇒ If less than 2 Ω, replace the K20 Engine Control Module.
⇒ If greater than 5.2 V
1. Ignition OFF, disconnect the X3 harness connector at the K20 Engine Control Module, ignition ON.
2. Test for less than 1 V between the signal circuit and ground.
⇒ If 1 V or greater, repair the short to voltage on the circuit.
⇒ If less than 1 V, replace the K20 Engine Control Module.
⇓ If between 4.8–5.2 V
Ignition OFF, connect a 3 A fused jumper wire to the signal circuit terminal 3/C, ignition ON.
Note: Additional DTCs may set when performing this test.
Verify the scan tool Crankshaft Position Sensor Active Counter parameter increments while rapidly tapping the fused jumper wire end
to ground.
⇒ If the counter does not increment
Replace the K20 Engine Control Module.
⇓ If the counter increments
Verify DTC P0336 is not set.
⇒ If the DTC is set
Inspect for the conditions listed below:
Excessive play or looseness of the B26 Crankshaft Position Sensor or the reluctor wheel
Improper installation of the B26 Crankshaft Position Sensor
Foreign material passing between the B26 Crankshaft Position Sensor and the reluctor wheel
Damaged reluctor wheel
Excessive air gap between the B26 Crankshaft Position Sensor and the reluctor wheel
Engine oil for debris
Timing chain, tensioner, and sprockets for wear or damage
⇒ If any of the conditions above are found, repair as necessary.
⇒ If all components test normal, test or replace the B26 Crankshaft Position Sensor.
⇓ If the DTC is not set
Test or replace the B26 Crankshaft Position Sensor.
Repair Instructions
Perform the Diagnostic Repair Verification after completing the repair.
Crankshaft Position Sensor Replacement
Control Module References for engine control module replacement, programming, and setup
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