P0011
DTC P0011
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 Descriptor
DTC P0011
- Camshaft Position (CMP) System Performance
Diagnostic Fault Information
Circuit/System Description
The camshaft position (CMP) actuator is attached to the camshaft and is hydraulically operated in order to change the angle of the camshaft relative to crankshaft position (CKP). The CMP actuator solenoid is controlled by the engine control module (ECM). The ECM sends a pulse width modulated 12-volt signal to a CMP actuator solenoid. The solenoid controls the amount of engine oil flow to the CMP actuator by extending a pintle within the solenoid. The pintle acts against a spool valve in the CMP actuator mechanism which is attached to the front of the camshaft. As the spool valve is moved, oil is directed to the CMP actuator, which rotates the camshaft. The CMP actuator can change the cam angle a maximum of 27 degrees.
Conditions for Running the DTC
* DTC P0010, P0016, P0335, P0336, P0340, or P0341 are not set.
* The system voltage is between 11-18 volts.
* The engine is running.
* The control module has enabled the CMP actuator and commanded greater than 0 degrees.
* DTC P0011 runs continuously when the above conditions are met.
Conditions for Setting the DTC
1. The CMP angle from the ECM is stable. If the CMP angle varies more than 7.5 cam degrees, then a stability timer of 2 seconds must expire before evaluating fail condition.
2. The difference between the desired CMP and the actual CMP angle is more than 8 degrees for 27.5 seconds during a 500-second sample.
Action Taken When the DTC Sets
* DTC P0011 is a Type B DTC.
* The CMP actuator is commanded to the parked position.
Conditions for Clearing the MIL/DTC
DTC P0011 is a Type B DTC.
Reference Information
Schematic Reference
Engine Controls Schematics (Electrical Diagrams)
Connector End View Reference
Component Connector End Views (Connector Views)
Description and Operation
* Camshaft Actuator System Description (Camshaft Actuator System Description)
* Lubrication Description (Description and Operation)
Electrical Information Reference
* Circuit Testing (Component Tests and General Diagnostics)
* Connector Repairs (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: The supply of clean pressurized engine oil to the CMP actuator is essential to CMP actuator performance.
1. Observe the engine oil level. The engine oil level should be within operating range. Refer to Approximate Fluid Capacities (Capacity Specifications).
2. Ensure that the vehicle has the correct engine oil and is not old, burnt or contains additives. Refer to Checking Things Under the Hood in Service and Appearance Care.
• If the vehicle has the incorrect engine oil, is old, burnt, or contains additives then change the oil and filter.
3. Test the engine oil pressure for correct operation. Refer to Oil Pressure Diagnosis and Testing (Component Tests and General Diagnostics).
4. Allow the engine to reach operating temperature.
5. Set the parking brake and place the vehicle in park for automatic, or neutral for manual.
6. Observe the CMP variance parameter. The CMP Variance will rise for 1-2 seconds until the CMP Angle parameter matches the Desired CMP parameter. The CMP Variance should again return to 0 degrees.
Important: The engine will run rough and may require throttle input to keep running.
7. Command the CMP actuator to 20 degrees. The Desired CMP parameter should match the CMP Angle parameter.
Circuit/System Testing
Important: You must complete the Circuit/System Verification before proceeding with Circuit/System Testing.
1. Test for less than 1 ohm between the low reference circuit terminal 2 at the harness connector and ground.
• If greater than 1 ohm, test the low reference for an open/high resistance. If the circuit tests normal replace the CMP Actuator solenoid.
2. Test for less than 1 ohm on the high control circuit terminal 1 at the harness connector and ECM X2-16.
• If greater than 1 ohm, test the high control circuit for an open/high resistance. If the circuit tests normal, perform the Component Testing for CMP actuator solenoid.
3. Inspect the CMP actuator. Refer to Camshaft Position Actuator Cleaning and Inspection () and Camshaft Position Actuator Magnet Cleaning and Inspection ().
4. Inspect the engine timing components-Refer to Camshaft Timing Chain and Sprocket Cleaning and Inspection ().
Component Testing
Static Test
1. Ignition OFF, disconnect the CMP actuator solenoid harness connector at the CMP actuator solenoid.
Important: Ensure component is tested at 20°C (68°F).
2. Test for 4.6-5.2 ohms of resistance between the high control terminal 1 and the low reference terminal 2 of the CMP actuator solenoid.
• If the resistance is not within the specified range, replace the CMP actuator solenoid.
Dynamic Test
Important: Do not allow the solenoid to be energized for more than 2 seconds.
1. Install fused jumper wire between the high control terminal 1 and 12 volts. Install a jumper wire between the low reference terminal 2 and momentarily connect to ground.
2. Point the CMP actuator solenoid towards a shop towel. Observe the operation of the solenoid immediately extends.
• If the function does not perform as specified, replace the CMP actuator solenoid.
Repair Instructions
Perform the Diagnostic Repair Verification (Verification Tests) after completing the diagnostic procedure.
* Control Module References (Programming and Relearning) for ECM replacement, setup, and programming
* Camshaft Position Actuator Magnet Removal (Overhaul)
* Timing Chain and Sprocket Removal (Overhaul) for timing chain, sprockets, CMP actuator filter screen, and CMP actuator replacement.