P0335
DTC P0335 or P0339
Diagnostic Instructions
* Perform the Diagnostic System Check - Vehicle (Diagnostic System Check - Vehicle) prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis (Strategy Based Diagnosis) for an overview of the diagnostic approach.
* Diagnostic Procedure Instructions (Diagnostic Procedure Instructions) provides an overview of each diagnostic category.
DTC Descriptors
DTC P0335
- Crankshaft Position (CKP) Sensor Circuit
DTC P0339
- Crankshaft Position (CKP) Sensor Circuit Intermittent
Diagnostic Fault Information
Circuit/System Description
The CKP sensor is a magnetic generator type sensor, producing an alternating current signal. The CKP sensor signal increases in both frequency and amplitude as the engine RPM increases. The CKP sensor reluctor has 34 teeth and is mounted on the crankshaft behind the timing chain cover and the crankshaft pulley. When the crankshaft rotates, the CKP sensor signal rotor teeth pass by the CKP sensor causing a fluctuation in the sensors magnetic field. The fluctuation in the magnetic field induces a voltage in the CKP sensor circuitry that corresponds to every 10 degrees of crankshaft rotation. The reluctor has one wide tooth that indicates top dead center (TDC) of the number 1 cylinder. With the information that the PCM receives from the CKP sensor, the PCM determines engine speed and crankshaft position. There will be no spark or fuel delivery if there is no CKP sensor signal.
Conditions for Running the DTC
P0335
* The engine is cranking or running.
* While cranking, the crank signal circuit must communicate to the PCM that the starter is cranking the engine.
* DTC P0335 runs continuously once the above condition is met.
P0339
* Engine speed is greater than 600 RPM.
* DTC P0339 runs continuously once the above condition is met.
Conditions for Setting the DTC
P0335
* No CKP sensor input to the PCM for 5 seconds while cranking the engine.
OR
* No CKP sensor input to the PCM with the engine for 3 seconds with the engine running.
P0339
The CKP sensor input is not continuous after the engine is running.
Action Taken When the DTC Sets
DTCs P0335 and P0339 are Type A DTCs.
Conditions for Clearing the DTC
DTCs P0335 and P0339 are Type A DTCs.
Diagnostic Aids
The following conditions could also set the DTCs:
* Physical damage to the CKP sensor or the reluctor wheel
* Excessive play or looseness of the CKP sensor or the reluctor wheel
* Improper installation of the CKP sensor or the reluctor wheel
* Foreign material passing between the CKP sensor and the reluctor wheel
* Excessive air gap between the CKP sensor and the reluctor wheel
Reference Information
Schematic Reference
Engine Controls Schematics ([1][2]Electrical Diagrams)
Connector End View Reference
Component Connector End Views (Connector Views)
Description and Operation
Electronic Ignition System Description (Description and Operation)
Electrical Information Reference
* Circuit Testing (Circuit Testing)
* Connector Repairs (Connector Repairs)
* Testing for Intermittent Conditions and Poor Connections (Testing for Intermittent Conditions and Poor Connections)
* Wiring Repairs (Wiring Repairs)
DTC Type Reference
Powertrain Diagnostic Trouble Code (DTC) Type Definitions (Powertrain Diagnostic Trouble Code (DTC) Type Definitions)
Scan Tool Reference
Control Module References (Programming and Relearning) for scan tool information
Circuit/System Verification
Note: If you were sent here from Engine Cranks but Does Not Run, proceed to Circuit/System Testing.
1. Attempt to start the engine, observe the DTC information with a scan tool. DTC P0335 and P0339 should not set.
2. Engine cranking, observe the scan tool Engine Speed parameter. The scan tool should indicate a steady 200-300 RPM while cranking.
3. Move related harnesses/connectors of the CKP sensor and verify the engine does not stumble, stall, or change engine speed.
4. Operate the vehicle within the Conditions for Running the DTC to verify the DTC does not reset. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records data.
Circuit/System Testing
Note: If the CKP sensor lead is damaged in any way, replace the CKP sensor.
1. Ignition OFF, disconnect the harness connector at the CKP sensor.
2. Ignition OFF, test for less than 10 ohm between the low reference circuit terminal 2 and ground G104.
• If greater than the specified range, test the low reference circuit for an open/high resistance. If the circuit tests normal, replace the PCM.
3. Ignition ON, test for 1.4-1.6 V AC between the signal circuit terminal 1 and the low reference circuit terminal 2 of the CKP sensor while cranking the engine.
• If less than the specified range, test the applicable circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the PCM.
• If greater than the specified range, test the applicable circuit for a short to voltage. If the circuit tests normal, replace the PCM.
4. If all circuits test normal, test or replace the CKP sensor.
Component Testing
Note: If the CKP sensor lead is damaged in any way, replace the CKP sensor.
1. Ignition OFF, disconnect the harness connector at the CKP sensor.
2. Test for 1,160-1,450 ohm at 20°C (68°F) between the signal terminal 1 and low reference terminal 2.
• If not within the specified range, replace the CKP sensor.
Repair Instructions
Perform the Diagnostic Repair Verification (Verification Tests) after completing the diagnostic procedure.
* Crankshaft Position Sensor Replacement (Service and Repair)
* Control Module References (Programming and Relearning) for control module replacement, setup, and programming