LF1, LFW, LFX, LWR
DTC P0011, P0014, P0021, or P0024 (LF1, LFW, LFX, LWR)
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 Bank 1
DTC P0014
- Exhaust Camshaft Position System Performance Bank 1
DTC P0021
- Intake Camshaft Position System Performance Bank 2
DTC P0024
- Exhaust Camshaft Position System Performance Bank 2
Circuit/System Description
The camshaft position 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 signal from the ECM is pulse width modulated (PWM). The ECM controls the camshaft position actuator solenoid duty cycle by controlling the amount of solenoid ON time. The camshaft position actuator solenoid controls the advance or the retard of each camshaft. The camshaft position actuator solenoid controls the oil flow that applies the pressure to advance or retard the camshafts.
Conditions for Running the DTC
* DTC P0010, P0013, P0020, P0023, P0016, P0017, P0018, P0019, P0335, P0336, P0340, P0341, P0345, P0346, P0365, P0366, P0390, and P0391 is not set.
* The ignition voltage is greater than 11 V.
* The engine is operating.
* The desired camshaft position is not changing greater than 4.5 degrees for at least 1 s.
* Both of the desired and actual camshaft position actuator values cannot be greater than 20 degrees or less than 5 degrees.
* DTCs P0011, P0014, P0021, and P0024 run continuously once the above conditions are met.
Conditions for Setting the DTC
P0011 and P0021
The ECM detects the difference between the desired and actual camshaft position angle is greater than 5 degrees for greater 2.5 s.
P0014 and P0024
The ECM detects the difference between the desired and actual camshaft position angle is greater than 5 degrees for greater 10 s.
Action Taken When the DTC Sets
DTCs P0011, P0014, P0021, and P0024 are type B DTCs.
Conditions for Clearing the DTC
DTCs P0011, P0014, P0021, and P0024 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 parameter. Advise the customer an oil change may be required.
* Inspect the engine for any recent engine mechanical repairs. An incorrectly installed camshaft, camshaft position actuator solenoid, mechanical camshaft actuator, or timing chain can cause this DTC to set.
Reference Information
Schematic Reference
Engine Controls Schematics [1][2]Electrical Diagrams
Connector End View Reference
Component Connector End Views Connector Views
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 parameter. Advise the customer an oil change may be required.
1. Verify the engine has the correct oil pressure. Refer to Oil Pressure Diagnosis and Testing Oil Pressure Diagnosis and Testing.
2. Ignition ON, observe the scan tool DTC information. Verify that DTC P0016, P0017, P0018, P0019, P0335, P0336, P0338, P0340, P0341, P0345, P0346, P0365, P0366, P0390, or P0391 is not set.
• If a DTC is set, refer to Diagnostic Trouble Code (DTC) List - Vehicle Diagnostic Trouble Code (DTC) List - Vehicle for further diagnosis.
Note: If a crankshaft or camshaft position sensor DTC is set, the Camshaft Position Actuator output control will not function.
3. Engine idling, command the appropriate Camshaft Position Actuator from 0 degrees to 20 degrees and back to zero while observing the appropriate scan tool Camshaft Position Variance parameters. The Camshaft Position Variance should be less than 2 degrees in each of the commanded states.
4. 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 appropriate camshaft position actuator solenoid valve.
2. Ignition OFF and all vehicle systems OFF. It may take up to 2 minutes for all vehicle systems to power down. Test for less than 5 ohm between the low reference circuit terminal 2 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, 1.5-4.5 V on the control circuit is normal.
3. Ignition ON, verify that a test lamp does not illuminate between the control circuit terminal 1 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 black lead to the control circuit terminal 1. Connect the DMM red lead to B+. Set the DMM on the diode setting. Command the CMP actuator solenoid ON and OFF with a scan tool. The DMM should transition from OL when commanded OFF to less than 1 V when commanded ON.
• If the circuit voltage does not correspond to the specified values, 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. Verify the following conditions do not exist with the camshaft position actuator solenoid valve:
* 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. Ignition OFF, swap the appropriate camshaft position actuator solenoid valve with a camshaft position actuator solenoid valve that is operating correctly.
7. Engine idling, command the appropriate Camshaft Position Actuator from 0 degrees to 20 degrees and back to zero while observing the appropriate scan tool Camshaft Position Variance parameters. The 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.
8. If all circuits/connections test normal, test or replace the camshaft position actuator solenoid valve.
Component Testing
1. Ignition OFF, disconnect the harness connector at the appropriate camshaft position actuator solenoid valve.
2. Test for 5-12 ohm between the control terminal 1 and the low reference circuit terminal 2 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.
Repair Instructions
Perform the Diagnostic Repair Verification Verification Tests after completing the repair.
* Camshaft Position Actuator Replacement - Bank 1 (LF1, LFW or LFX) Camshaft Position Actuator Replacement - Bank 1 (LF1, LFW or LFX)
* Camshaft Position Actuator Replacement - Bank 2 (LF1, LFW or LFX) Camshaft Position Actuator Replacement - Bank 2 (LF1, LFW or LFX)
* Camshaft Position Actuator Solenoid Valve Solenoid Replacement - Bank 1 (Right Side) Intake Camshaft Position Actuator Solenoid Valve Solenoid Replacement - Bank 1 (Right Side) Intake
* Camshaft Position Actuator Solenoid Valve Solenoid Replacement - Bank 1 (Right Side) Exhaust Camshaft Position Actuator Solenoid Valve Solenoid Replacement - Bank 1 (Right Side) Exhaust
* Camshaft Position Actuator Solenoid Valve Solenoid Replacement - Bank 2 (Left Side) Intake Camshaft Position Actuator Solenoid Valve Solenoid Replacement - Bank 2 (Left Side) Intake
* Camshaft Position Actuator Solenoid Valve Solenoid Replacement - Bank 2 (Left Side) Exhaust Camshaft Position Actuator Solenoid Valve Solenoid Replacement - Bank 2 (Left Side) Exhaust
* Control Module References Control Module References for ECM replacement, programming, and setup