P0014
DTC P0014
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 Descriptor
DTC P0014
- Exhaust Camshaft Position (CMP) System Performance
Diagnostic Fault Information
Circuit/System Description
The camshaft position actuator system enables the Engine Control Module (ECM) to change the timing of the exhaust camshaft while the engine is operating. The camshaft position actuator solenoid valve signal from the ECM is pulse width modulated (PWM). The ECM controls the camshaft position actuator solenoid valve duty cycle by controlling the amount of solenoid valve ON time. The camshaft position actuator solenoid valve controls the advance or the retard of the camshaft. The camshaft position actuator solenoid valve controls the oil flow that applies the pressure to advance or retard the camshaft.
The ECM controls the camshaft position actuator solenoid valve by supplying a 12 V pulse width modulated (PWM) signal. The ECM supplies a ground to the low reference circuit.
Conditions for Running the DTC
* DTC P0017, P0335, P0336, P0365, P0366 are not set.
* The engine is running.
* The system voltage is between 11-18 V.
* The ECM has enabled the CMP actuator and commanded greater than 0 degrees.
* DTC P0014 runs continuously when the above conditions are met.
Conditions for Setting the DTC
The difference between the desired CMP and the actual CMP angle is more than 3.75 degrees for 13.5 s.
Action Taken When the DTC Sets
DTC P0014 is a Type B DTC.
Conditions for Clearing the MIL/DTC
DTC P0014 is a Type B DTC.
Reference Information
Schematic Reference
Engine Controls Schematics [1][2]Electrical Diagrams
Connector End View Reference
Component Connector End Views Connector End Views By Name
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
Scan Tool Reference
Control Module References Control Module References for scan tool information
Circuit/System Verification
Note: The engine oil level and the oil pressure are critical to the correct operation of the camshaft position (CMP) actuator system. Verify that the engine has the correct oil level and the correct oil pressure before continuing with this diagnostic.
1. Verify the engine has the correct oil pressure. Refer to Oil Pressure Diagnosis and Testing Oil Pressure Diagnosis and Testing
Note: If a crankshaft or camshaft position sensor DTC is set, the Camshaft Position Actuator output control will not function.
2. Ignition ON, observe the scan tool DTC information. Verify DTC P0013, P0017, P0335, P0336, P0365, P0366, or P0520 are not set.
• If any of the DTCs are set, refer to Diagnostic Trouble Code (DTC) List - Vehicle Diagnostic Trouble Code (DTC) List - Vehicle for further diagnosis.
3. Engine idling at the normal operating temperature. Command the camshaft position actuator solenoid to 20° with a scan tool. The Desired Camshaft Position parameter should match the Camshaft Position parameter.
4. Observe the Camshaft Position Variance parameter with a scan tool. The Camshaft Position Variance will increment for several seconds, until the Camshaft Position value matches the Desired Camshaft Position value. The Camshaft Position Variance value should return to 0°.
5. 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 are captured in the Freeze Fame/Failure Records Data List.
Circuit/System Testing
1. Ignition OFF, disconnect the harness connector at the camshaft position actuator solenoid valve.
2. Test for less than 5 ohm between the low reference circuit terminal B and ground.
• If greater than the specified value, test the low reference circuit for an open/high resistance. If the circuit tests normal, replace the ECM.
Note: A test lamp must be used for this test. The control circuit is pulled-up to a low current voltage, B+ on the control circuit is normal.
3. Ignition ON, Engine OFF, verify that a test lamp does not illuminate between the control circuit terminal A and ground.
• If the test lamp illuminates, test the control circuit for a short to voltage. If the circuit tests normal, replace the ECM.
4. Connect the DMM between the control circuit terminal A and ground. Command the CMP actuator solenoid ON and OFF with a scan tool. The DMM voltage reading should change.
• If the circuit voltage does not change, test the control circuit for an open/high resistance or a short to ground. If the circuit tests normal, replace the ECM.
5. Remove the camshaft position actuator solenoid valve. Inspect the camshaft position actuator solenoid valve and mounting area for the following conditions:
* For a torn, restricted, mis-positioned, or missing screens at the camshaft position actuator solenoid valve
* For engine oil leaks between the oil sealing lands of the camshaft position actuator solenoid valve. Inspect the lands of the camshaft position actuator solenoid valve for nicks
* For oil seepage at the camshaft position actuator solenoid valve connector
• If a condition is found, replace camshaft position actuator solenoid valve.
6. Inspect for the following conditions:
* Excessive timing chain play-Refer to Camshaft Timing Chain and Sprocket Cleaning and Inspection 52. Camshaft Timing Chain and Sprocket Cleaning and Inspection.
* Proper operation of the mechanical CMP actuator assembly. A stuck or slow responding actuator may cause this DTC.
• If a condition is found, repair as necessary.
7. If all circuits/components test normal, test or replace the camshaft position actuator solenoid valve.
Component Testing
1. Ignition OFF, disconnect the harness connector at the camshaft position actuator solenoid valve.
2. Test for 5-13 ohm between the control terminal A and the low reference circuit terminal B of the camshaft position actuator solenoid valve.
• If not within the specified range, replace the camshaft position actuator solenoid valve.
3. Test for infinite resistance between each terminal and the camshaft position actuator solenoid valve housing.
• If not the specified value, replace the camshaft position actuator solenoid valve.
4. Connect a jumper wire between the CMP actuator low reference circuit at the solenoid and a good ground. Connect a fused jumper wire to the CMP actuator high control circuit at the solenoid. Momentarily touch the fused jumper to B+. Observe the spool valve inside the CMP actuator. The spool valve should move from fully closed to fully opened position.
Repair Instructions
Perform the Diagnostic Repair Verification Verification Tests after completing the repair.
* Camshaft Position Actuator Solenoid Valve Replacement Service and Repair
* Camshaft Position Exhaust Actuator Replacement Camshaft Position Exhaust Actuator Replacement
* Control Module References Control Module References for replacement, programming, and setup