P0014
DTC P0014
CIRCUIT 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).
CMP Actuator Authority:
If the desired CMP does not match the actual CMP for a calibrated amount of time, DTC P0011, P0014, P0021 or P0024 will set.
DTC DESCRIPTORS
This diagnostic procedure supports the following DTCs:
- 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
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 11-16 volts.
- DTC P0011, P0014, P0021, or P0024 runs continuously once 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.
The CMP actuator system will be disabled until the end of the ignition cycle.
CONDITIONS FOR CLEARING THE MIL/DTC
- The control module turns OFF the malfunction indicator lamp (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.
TEST
