P0335

DTC P0335

Circuit Description
The crankshaft position (CKP) sensor is located on top of the flywheel housing. There are 56 notches spaced 6 ° apart and a 24 ° section that is uncut. This uncut portion allows for the detection of cylinder #1 top dead center (TDC). The CKP sensor is a magnetic coil type sensor, which generates an AC signal voltage based on the crankshaft rotational speed. The engine control module (ECM) monitors both the CKP sensor and camshaft position sensor (CMP) signals to ensure they correlate with each other. If the ECM receives a certain amount of CMP sensor signal pulses without a CKP sensor signal, this DTC will set.

Condition for Running the DTC
- The CMP sensor signal pulse is detected.

Condition for Setting the DTC
- The ECM detects that the CKP sensor signals are not generated during 10 engine rotations.

Action Taken When the DTC Sets
- The ECM illuminates the malfunction indicator lamp (MIL) when the diagnostic runs and fails.
- The ECM records the operating conditions at the time the diagnostic fails. The ECM stores this information in the Failure Records.
- The ECM limits fuel injection quantity within 70%.
- The ECM closes the EGR valve and holds to close position.

Condition for Clearing the DTC
- A current DTC clears when the ignition is turned OFF.
- Clear the MIL and the DTC with a scan tool.

Diagnostic Aids
Ensure the sensor is tight and the flywheel teeth are not damaged.

If an intermittent condition is suspected, the following may cause an intermittent:
- Poor connections.
- Misrouted harness.
- Rubbed through wire insulation.
- Broken wire inside the insulation.

Check for the following conditions:
- Poor connection at ECM: Inspect harness connectors for backed-out terminals, improper mating, broken locks, improperly formed or damaged terminals, and poor terminal to wire connection.
- Damaged harness: Inspect the wiring harness for damage. If the harness appears to be OK, observe the "Crank Signal Present" display on the scan tool with the engine running while moving connectors and wiring harness related to the sensor. A change in the display will indicate the location of the fault.

DTC P0335

Schematic Reference: Engine Controls Schematics

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