DTC Descriptors
DTC P0011: Intake Camshaft Position (CMP) System Performance Bank 1DTC 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
Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.
Circuit | Short to Ground | High Resistance | Open | Short to Voltage | Signal Performance |
|---|---|---|---|---|---|
Intake CMP Actuator Solenoid Control Circuit Bank 1 | P0010, P0011 | P0010 | P0010 | P0010, P0011 | -- |
Exhaust CMP Actuator Solenoid Control Circuit Bank 1 | P0013, P0014 | P0013, P0014, | P0013 | P0013, P0014 | -- |
Intake CMP Actuator Solenoid Control Circuit Bank 2 | P0020, P0021 | P0020, P0021 | P0020 | P0020, P0021 | -- |
Exhaust CMP Actuator Solenoid Control Circuit Bank 2 | P0023, P0024 | P0023, P0024 | P0023 | P0023, P0024 | -- |
Intake CMP Actuator Solenoid Low Reference Circuit Bank 1 | -- | P0010, P0011 | P0010 | -- | -- |
Exhaust CMP Actuator Solenoid Low Reference Circuit Bank 1 | -- | P0013, P0014 | P0013 | -- | -- |
Intake CMP Actuator Solenoid Low Reference Circuit Bank 2 | -- | P0020, P0021 | P0020 | -- | -- |
Exhaust CMP Actuator Solenoid Low Reference Circuit Bank 2 | -- | P0023, P0024 | P0023 | -- | -- |
Circuit/System Description
The camshaft position (CMP) actuator system is comprised of 4 CMP actuator solenoids, 4 oil control valves, and 4 CMP actuators. The engine control module (ECM) sends an electrical signal to the CMP actuator solenoids through the control circuits when a camshaft timing change is desired. The ground circuits of the CMP actuator solenoids are used as a return. The CMP actuator solenoid uses electromagnetic force to pull on the plunger of the oil control valve. The oil control valve will port the pressurized engine oil to either the advancing or retarding chambers of the CMP actuator. The CMP actuator, in turn, changes the CMP relative to the crankshaft position (CKP). If the desired CMP does not match the actual CMP for a calibrated amount of time, DTC P0011, P0014, P0021 or P0024 will set.
Conditions for Running the DTC
| • | DTCs P0010, P0011, P0013, P0014, P0016, P0017, P0018, P0019, P0020, P0021, P0023, P0024, P0335, P0336, P0340, P0341, P0345, P0346, P0365, P0366, P0390, P0391, P2088, P2089, P2090, P2091, P2092, P2093, P2094, P2095 are not set. |
| • | The CMP actuators are commanded. |
| • | The engine oil pressure (EOP) is between 100-696.4 kPa (14.5-101 psi). |
| • | The engine speed is at an RPM between 1,000-6,500 RPM, that will allow for steady activation of the cam actuators based on calculated engine oil temperature (EOT). |
| • | The calculated EOT is between -10°C to +150°C (+14°F to +302°F). |
| • | The ignition voltage is between 9-18 volts. |
| • | DTC P0011, P0014, P0021, or P0024 runs continuously when the above conditions are met. |
Conditions for Setting the DTC
The ECM detects the difference between the desired camshaft position and the actual camshaft position angles is more than 6 degrees for more than 1.6 seconds.
Action Taken When the DTC Sets
| • | The control module illuminates the malfunction indicator lamp (MIL) when the diagnostic runs and fails. |
| • | The control module records the operating conditions at the time the diagnostic fails. The control module stores this information in the Freeze Frame/Failure Records. |
Conditions for Clearing the DTC
| • | The control module turns OFF the MIL after 3 consecutive ignition cycles that the diagnostic runs and does not fail. |
| • | A current DTC, Last Test Failed, clears when the diagnostic runs and passes. |
| • | A history DTC clears after 40 consecutive warm-up cycles, if no failures are reported by this or any other emission related diagnostic. |
| • | Clear the MIL and the DTC with a scan tool. |
Reference Information
Schematic Reference
Connector End View Reference
Electrical Information Reference
DTC Type Reference
Powertrain Diagnostic Trouble Code (DTC) Type Definitions
Scan Tool Reference
Circuit/System Verification
Important: If you cannot duplicate the condition, operate the vehicle within the Conditions for Running the DTC. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records.
If DTCs P0010, P0013, P0020, P0023 are set, diagnose those DTCs first.
Circuit/System Testing
- Measure the CMP actuator solenoid for the following specified resistance for the given temperature.
- Disconnect the ECM. Test the affected CMP actuator solenoid control circuit for less than 2.5 ohms of resistance.
- Test the affected CMP actuator solenoid ground circuit for less than 2.5 ohms of resistance.
- Inspect for the following conditions
| • | 3.25-3.66 ohms at 40°C (40°F) |
| • | 4.0-4.5 ohms at 20°C (68°F) |
| • | 4.0-4.52 ohms at 25°C (77°F) |
| • | 5.6-6.4 ohms at 125°C (257°F) |
| ⇒ | If the resistance is not at the specified value for the given temperature replace the affected CMP actuator solenoid. |
| ⇒ | If the resistance is more the 2.5 ohms repair the circuit as needed. |
| ⇒ | If the resistance is more the 2.5 ohms repair the circuit as needed. |
| • | Degraded oil quality, incorrect oil viscosity, and improper oil level |
| • | Improper alignment of the CMP actuator solenoid to the oil control valve |
| • | Low engine oil pressure |
| • | Oil pressure leaks and restrictions in the dedicated oil passages from the oil filter to the affected CMP actuator |
| • | A slow moving or sticking oil control valve |
| • | A loose primary or secondary timing chain |
| ⇒ | If no condition is found, replace the ECM. |
Component Testing
Measure the CMP actuator solenoid for the following specified resistance for the given temperature.
| • | 3.25-3.66 ohms at 40°C (40°F) |
| • | 4.0-4.5 ohms at 20°C (68°F) |
| • | 4.0-4.52 ohms at 25°C (77°F) |
| • | 5.6-6.4 ohms at 125°C (257°F) |
| ⇒ | If the resistance is not at the specified value for the given temperature replace the affected CMP actuator solenoid. |
Repair Instructions
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
| • | Control Module References for ECM replacement, setup, and programming. |
