P0014
DTC P0011, P0014, P0021, or P0024
Diagnostic Instructions
* Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. Initial Inspection and Diagnostic Overview
* Review Strategy Based Diagnosis for an overview of the diagnostic approach.
* Diagnostic Procedure Instructions provides an overview of each diagnostic category.
DTC Descriptors
DTC P0011
- Intake Camshaft Position (CMP) System Performance Bank 1
DTC P0014
- Exhaust Camshaft Position (CMP) System Performance Bank 1
DTC P0021
- Intake Camshaft Position (CMP) System Performance Bank 2
DTC P0024
- Exhaust Camshaft Position (CMP) System Performance Bank 2
Diagnostic Fault Information
Circuit/System Description
The camshaft position (CMP) actuator is attached to each 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 each 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 each 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 25 degrees.
Conditions for Running the DTC
* DTCs P0010, P0016, P0017, P0018, P0019, P0335, P0336, P0340, P0341, P0345, P0346, P0365, P0366, P0390, or P0391 are not set.
* The system voltage is between 11-18 volts.
* The engine is running.
* The ECM has enabled the CMP actuator and commanded greater than 0 degrees.
* DTC P0011, P0014, P0021, P0024 runs continuously when the above conditions are met.
Conditions for Setting the DTC
1. Each CMP angle from the ECM is stable. If the CMP angle varies more than 4.5 cam degrees, then a stability timer of 1 second must expire before evaluating fail condition.
2. The difference between the desired CMP and the actual CMP angle is more than 5 degrees for 10 seconds during a 300-second sample.
Action Taken When the DTC Sets
* DTCs P0011, P0014, P0021, P0024 are Type B DTCs.
* The CMP actuators are commanded to the home or parked position.
Conditions for Clearing the MIL/DTC
DTCs P0011, P0014, P0021, P0024 are Type B DTCs.
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 (Standard) Approximate Fluid Capacities (Hybrid).
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 within the Owner's Manual.
^ 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.
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 applicable 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 applicable 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 applicable CMP actuator solenoid low reference circuit terminal 2 and ground.
^ If greater than 1 ohm, test the low reference for an open/high resistance. If the circuit tests normal, replace the applicable CMP actuator solenoid.
2. Test for less than 1 ohm on the applicable CMP actuator solenoid high control circuit terminal 1.
^ If greater than 1 ohm, test the high control circuit for an open/high resistance. If the circuit tests normal, replace the applicable CMP actuator solenoid.
3. Inspect the affected CMP actuator.
4. Inspect the engine timing components.
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 4.6-7.5 ohms 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 after completing the diagnostic procedure. Verification Tests
* Camshaft Position Actuator Replacement - Bank 2 (Left Side) Exhaust
* Camshaft Position Actuator Replacement - Bank 1 (Right Side) Exhaust
* Camshaft Position Actuator Replacement - Bank 2 (Left Side) Intake
* Camshaft Position Actuator Replacement - Bank 1 (Right Side) Intake
* Camshaft Timing Drive Components Cleaning and Inspection for timing chain, sprockets, CMP actuator filter screen, and CMP actuator replacement