P0011

DTC P0011 or 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 Descriptors

DTC P0011
- Intake Camshaft Position System Performance

DTC P0014
- Exhaust Camshaft Position System Performance

Circuit/System Description

The camshaft position (CMP) actuator system enables the engine control module (ECM) to change the timing of the camshafts while the engine is operating. The camshaft position actuator solenoid valves are operated hydraulically in order to change the angle of the camshaft relative to crankshaft position. The camshaft position actuator solenoid valves are controlled by the engine control module (ECM). The ECM sends a pulse width modulated signal to the camshaft position actuator solenoid valves. The camshaft position actuator solenoid valves control the amount of engine oil flow that applies the pressure to advance or retard the camshafts.

Conditions for Running the DTC

* DTC P0010, P0013, P0016, P0017, P0335, P0340, P0341, P0365, or P0366 is not set.

* The engine is running.

* The ignition voltage is between 11-32 V.

* The camshaft position actuator is enabled.

* The rate of change in the camshaft position is less than 3° for 4 s.

* DTCs P0011 and P0014 runs continuously once the above conditions are met for greater than 0.1 s.

Conditions for Setting the DTC

The ECM detects a difference between the camshaft position angle and the desired camshaft position angle is greater than 6 to 10° based on engine coolant temperature and engine speed.

Action Taken When the DTC Sets

DTCs P0011 and P0014 are Type B DTCs.

Conditions for Clearing the DTC

DTCs P0011 and P0014 are Type B DTCs.

Diagnostic Aids

* The engine oil condition has a major impact on the camshaft actuator system.

* A low oil level condition may set this DTC. The engine may require an oil change. Inquire with the customer when the last oil change was performed. You may also monitor the scan tool Engine Oil Life Remaining parameter. Advise the customer an oil change may be required.

* Inspect the engine for any recent engine mechanical repairs. An incorrectly installed camshaft, camshaft actuator, or timing belt can cause this DTC to set.

* A resistance greater than 8 ohms on the camshaft position actuator solenoid valve control circuit may set this DTC. If you suspect high resistance, ground the control circuit while the engine is idling. The scan tool Intake or Exhaust Camshaft Position Actuator Solenoid Valve Control Circuit Low Voltage Test Status should display Malfunction. If the parameter displays OK, test the control circuit for high resistance.

Reference Information

Schematic Reference

Engine Controls Schematics [1][2]Electrical Diagrams

Connector End View Reference

Component Connector End Views Fuel Pump and Level Sensor Assembly

Description and Operation

Camshaft Actuator 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 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 actuator system. Verify that the engine has the correct oil level and the correct oil pressure before continuing with this diagnostic.

* The engine oil condition has a major impact on the camshaft actuator system. Debris in the oil can interfere with the camshaft position actuator solenoid and the mechanical camshaft actuator operation. Inspect for dirty or degraded crankcase oil. The engine may require an oil change. Inquire with the customer when the last oil change was performed. You may also monitor the scan tool Engine Oil Life Remaining parameter. Advise the customer an oil change may be required.

1. Verify the correct engine 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 scan tool Camshaft Position Actuator output control will not function.

2. Ignition ON.

3. Verify that DTC P0010, P0013, P0016, P0017, P0335, P0336, P0340, P0341, P0365, P0366, P2088, P2089, P2090 or P2091 is not set.

• If any of the DTCs are set
If any of the DTCs are set, refer to Diagnostic Trouble Code (DTC) List - Vehicle Diagnostic Trouble Code (DTC) List - Vehicle.

• If none of the DTCs are set

Note: If there is no condition with the camshaft position actuator, the engine may stall when commanding the actuator to 20 degrees.

4. Engine idling, command the appropriate Camshaft Position Actuator from 0 degrees to 20 degrees and back to zero while observing the appropriate scan tool Intake/Exhaust Camshaft Position Variance parameters. Once stabilized, the Intake/Exhaust Camshaft Position Variance should be less than 2 degrees in each of the commanded states.

• If not within the specified range
Refer to Circuit/System Testing.

• If within the specified range

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 you observed from the Freeze Frame/Failure Records data.

6. Verify a DTC does not set.

• If any DTC sets
Refer to Circuit/System Testing.

• If a DTCs does not set

7. All OK.

Circuit/System Testing

1. Ignition OFF and all vehicle systems OFF, disconnect the appropriate harness connector at the Q6 Camshaft Position Actuator Solenoid Valve. It may take up to 2 minutes for all vehicle systems to power down.

2. Test for less than 5 ohms between the low reference circuit terminal 1 and ground.

• If 5 ohms or greater

1. Ignition OFF.

2. Disconnect the harness connector at the K20 Engine Control Module.

3. Test for less than 2 ohms in the low reference circuit end to end.

• If 2 ohms or greater, repair the open/high resistance in the circuit

• If less than 2 ohms, replace the K20 Engine Control Module

• If less than 5 ohms

3. Ignition ON.

Note: A test lamp must be used for this test. The control circuit is pulled-up to a low current voltage, 1.5-4.5 V on the control circuit is normal.

4. Ignition ON.

5. Verify that a test lamp does not illuminate between the control circuit terminal 2 and ground.

• If the test lamp illuminates

1. Ignition OFF.

2. Disconnect the harness connector at the K20 Engine Control Module.

3. Ignition ON.

4. Test for less than 1 V between the control circuit and ground.

• If 1 V or greater, repair the short to voltage on the circuit

• If less than 1 V, replace the K20 Engine Control Module

• If the test lamp does not illuminate

6. Remove the test lamp.

7. Ignition ON, command the appropriate camshaft position actuator solenoid valve from OFF to ON with a scan tool while observing the appropriate scan tool Camshaft Position Actuator Solenoid Valve Control Circuit Low Voltage Test Status. The value should toggle between OK and Not Run in each of the commanded states.

• If the parameter does not correspond to the specified values

1. Ignition OFF.

2. Disconnect the harness connector at the K20 Engine Control Module.

3. Test for less than 2 ohms in the control circuit end to end.

• If 2 ohms or greater, repair the open/high resistance or short to ground in the circuit

• If less than 2 ohms, replace the K20 Engine Control Module

• If the parameter corresponds to the specified values

Note: If debris is found on CMP screens, clean the screens and reinspect for damage. If the screens are not damaged, reinstall in the engine.

8. Remove the Q6 camshaft position actuator solenoid valve. Verify the following conditions do not exist with the Q6 Camshaft Position Actuator Solenoid Valve:

* Torn, mis-positioned, or missing screens at the CMP actuator solenoid.

* Engine oil leak between the oil sealing lands of the CMP actuator solenoid. Inspect the lands of the CMP actuator solenoid for nicks.

* Oil seepage at the CMP actuator solenoid connector

• If a condition is found.
Replace the Q6 Camshaft Position Actuator Solenoid Valve.

• If no condition is found

Note: After swapping the solenoids, install jumper wires to the appropriate terminals of the harness connectors and the solenoids.

9. Ignition OFF, swap the appropriate intake or exhaust Q6 Camshaft Position Actuator Solenoid Valve with the Q6 Camshaft Position Actuator Solenoid Valve that is operating correctly.

10. Engine idling, command the appropriate Camshaft Position Actuator from 0 degrees to 20 degrees and back to zero while observing the appropriate scan tool Intake/Exhaust Camshaft Position Variance parameters. The Intake/Exhaust Camshaft Position Variance should be less than 2 degrees in each of the commanded states.

• If greater than the specified value
Replace the mechanical camshaft position actuator on the camshaft.

• If less than the specified value

11. If all circuits/connections test normal, test or replace the Q6 Camshaft Position Actuator Solenoid Valve.

Component Testing

1. Vehicle OFF

2. Disconnect the harness connector at the appropriate Q6 Camshaft Position Actuator Solenoid Valve.

3. Test for 7-12 ohms between the control terminal 2 and the low reference circuit terminal 1.

• If not between 7-12 ohms
Replace the Q6 Camshaft Position Actuator Solenoid Valve.

• If between 7-12 ohms

4. Test for infinite resistance between each terminal and the Q6 Camshaft Position Actuator Solenoid Valve housing.

• If less than infinite resistance
Replace the Q6 Camshaft Position Actuator Solenoid Valve.

• If infinite resistance

5. All OK

Repair Instructions

Perform the Diagnostic Repair Verification Verification Tests after completing the repair.

* Camshaft Position Actuator Solenoid Valve Replacement Camshaft Position Actuator Solenoid Valve Replacement

* Control Module References Control Module References for ECM replacement, programming and setup