P0336
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 circuits consist of an engine control module (ECM) supplied 5-volt reference circuit, low reference circuit, and an output signal circuit. The CKP sensor is an externally magnetic biased digital output integrated circuit sensing device. The sensor provides a pulse for each magnetic pole of the magnetic encoder wheel on the crankshaft. Each pole on the encoder wheel is spaced at 60-pole spacing, with 2 missing poles for the reference gap. The CKP sensor produces an ON/OFF DC voltage of varying frequency, with 58 output pulses per crankshaft revolution. The frequency of the CKP sensor output depends on the velocity of the crankshaft. The CKP sensor sends a digital signal, which represents an image of the crankshaft encoder wheel, to the ECM as each pole on the wheel rotates past the CKP sensor. The ECM uses each CKP signal pulse to determine crankshaft speed and decodes the crankshaft encoder 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 CKP 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
* The ignition is ON.
* The engine is running.
* The DTC runs continuously when the above conditions are met.
P0336
* DTCs P0016, P0201-P0204, P0261, P0262, P0264, P0265, P0267, P0268, P0270, P0271, P0335, P0340, P0341, P0365, P0366, P0443, P0453, or P0458 are not set.
* The ignition is ON.
* The engine is running.
* The DTC runs continuously when the above conditions are met.
Conditions for Setting the DTC
P0335
The ECM does not detect a signal from the CKP sensor for 4 engine revolutions.
P0336
* The ECM detects an incorrect number of CKP sensor pulses for 20 engine revolutions.
OR
* The ECM determines that the CKP sensor signal is out of range for 24 engine revolutions.
Action Taken When the DTC Sets
DTCs P0335 and P0336 are Type B DTCs.
Conditions for Clearing the DTC
DTCs P0335 and P0336 are Type B DTCs.
Reference Information
Schematic Reference
Engine Controls Schematics (Electrical Diagrams)
Connector End View Reference
Component Connector End Views (Connector Views)
Description and Operation
Electronic Ignition (EI) System Description (Electronic Ignition (EI) System Description)
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
1. Attempt to start the engine. Observe the DTC information with a scan tool. DTCs P0335 and P0336 should not set.
2. Move related harnesses/connectors of the CKP sensor. Verify the engine does not stumble, stall, or change engine speed.
3. 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
1. Ignition OFF, disconnect the harness connector at the CKP sensor.
2. Ignition OFF, test for less than 1 ohm between the low reference circuit terminal 2 and ground.
• If greater than the specified range, test the low reference circuit for an open/high resistance. If the circuit tests normal, replace the ECM.
Important: 5K ohms or greater in the 5-volt reference circuit will cause this DTC to set.
3. Ignition ON, engine OFF, test for 4.8-5.2 volts between the 5-volt reference circuit terminal 1 and ground.
• If less than the specified range, test the 5-volt reference 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 5-volt reference circuit for a short to voltage. If the circuit tests normal, replace the ECM.
4. Ignition ON, engine OFF, test for 4.8-5.2 volts between the signal circuit terminal 3 and ground.
• If less than the specified range, test the signal 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 signal circuit for a short to voltage. If the circuit tests normal, replace the ECM.
5. Ignition OFF, connect a fused jumper wire to signal circuit terminal 3.
6. Ignition ON, momentarily touch the other end of the fused jumper wire to the battery negative post repeatedly. The engine RPM parameter on the scan tool should change.
• If the engine RPM parameter changes, test or replace the CKP sensor.
• If the engine RPM parameter does not change, replace the ECM.
7. Ignition OFF, inspect the CKP sensor for correct installation. Remove the CKP sensor from the engine. Inspect the sensor for damage.
• If the sensor is loose, inspect the sensor and the sensor bracket for damage. Replace as necessary.
8. Inspect the engine for the following conditions:
* Engine oil for debris
Notice: Do not allow the crankshaft encoder wheel to come into contact with external magnetic fields or sharp metal objects. Do not drop the crankshaft encoder wheel. Do not damage the rubberized encoder track. Failure to follow these precautions may cause damage to the component.
* Crankshaft encoder wheel for damage
* Timing belt, tensioner, and sprockets for wear or damage
• If debris is found in the engine oil, inspect the internal engine components to determine the cause. Repair or replace any worn or damaged components.
9. If all circuits and components test normal, test or replace the CKP sensor.
Component Testing
Important: You must perform the Circuit/System Testing before proceeding with Component Testing.
1. Remove the CKP sensor and inspect the sensor and the O-ring for damage.
2. Connect the connector to the CKP sensor.
3. Ignition ON, engine OFF, observe the engine RPM parameter while passing a steel object by the tip of the sensor repeatedly. The engine RPM parameter should change.
• If the engine RPM parameter does not change, 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 replacement, setup, and programming