P0335
DTC P0335 or P0336
Diagnostic Instructions
* Perform the Diagnostic System Check - Vehicle (Initial Inspection and Diagnostic Overview) prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis (Initial Inspection and Diagnostic Overview) for an overview of the diagnostic approach.
* Diagnostic Procedure Instructions (Initial Inspection and Diagnostic Overview) provides an overview of each diagnostic category.
DTC Descriptors
DTC P0335
- Crankshaft Position (CKP) Sensor Circuit
DTC P0336
- Crankshaft Position (CKP) Sensor Performance
Diagnostic Fault Information
Circuit/System Description
The crankshaft position (CKP) sensor signal indicates the crankshaft speed and position. The CKP sensor produces an AC voltage of different amplitude and frequency. The frequency depends on the velocity of the crankshaft, and the AC voltage output depends on the crankshaft position and battery voltage. The CKP sensor works in conjunction with a 58X reluctor wheel attached to the crankshaft. The engine control module (ECM) can synchronize the ignition timing, fuel injector timing, and spark knock control based on the CKP and the camshaft position (CMP) sensor inputs. The CKP sensor is also used to detect misfire and tachometer display.
Conditions for Running the DTC
* DTCs P0016 and P0340 are not set.
* The engine is cranking or running.
* The DTCs run continuously once the above conditions are met.
Conditions for Setting the DTC
DTC P0335
The ECM does not detect a signal from the CKP sensor.
DTC P0336
The ECM detects an incorrect number of CKP reference pulses for 10 consecutive crankshaft revolutions.
Action Taken When the DTC Sets
* DTCs P0335 and P0336 are Type B DTCs.
* The ECM will use the camshaft position (CMP) sensor for engine operation.
Conditions for Clearing the DTC
DTCs P0335 and P0336 are Type B 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 (MR140 w/o Throttle Actuator Control) (Electrical Diagrams)Engine Controls Schematics (MT34 w/Throttle Actuator Control) (Electrical Diagrams)Engine Controls Schematics (Hatchback) (Electrical Diagrams)
Electrical Information Reference
* Circuit Testing (Component Tests and General Diagnostics)
* Connector Repairs (Component Tests and General Diagnostics)
* Testing for Intermittent Conditions and Poor Connections (Component Tests and General Diagnostics)
* Wiring Repairs (Component Tests and General Diagnostics)
DTC Type Reference
Powertrain Diagnostic Trouble Code (DTC) Type Definitions (Diagnostic Trouble Code Descriptions)
Scan Tool Reference
Control Module References (Programming and Relearning) for scan tool information
Circuit/System Verification
Important: 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 P0336 should not set.
2. Engine cranking, observe the scan tool Engine Speed parameter. The scan tool should indicate an engine speed greater than 0 RPM.
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
Important: 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 ON, test for 2-3 volts between the signal circuit terminal 1 and the low reference circuit terminal 2.
• 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 ECM.
• If greater than the specified range, test the applicable circuit for a short to voltage. If the circuit tests normal, replace the ECM.
3. If all circuits test normal, test or replace the CKP sensor.
Component Testing
1. Ignition OFF, disconnect the harness connector at the CKP sensor.
Important: If the CKP sensor lead is damaged in any way, replace the CKP sensor.
2. Test for 500-700 ohms between the signal terminal 1 and low reference terminal 2.
• If not within the specified range, replace the CKP sensor.
3. Disconnect the fuel pump relay.
4. Set the DMM to the AC voltage scale.
5. Engine cranking, test for more than 500 mV AC between the signal terminal 1 and low reference terminal 2.
• If less than 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 ECM replacement, setup, and programming