DTC P0012


DTC P0012	CMP - Timing over-retarded
DETECTION CONDITION	• The actual valve timing is over-retarded from the target valve timing when the OCV system control is within feedback range. Diagnostic support note • This is a continuous monitor (CCM). • The MIL illuminates if the PCM detects the above malfunction condition during the first drive cycles. • The PENDING CODE is available if the PCM detects the above malfunction condition. • The FREEZE FRAME DATA is available. • The DTC is stored in the PCM memory.
POSSIBLE CAUSE	• OCV malfunction • Low engine oil pressure • The spool valve in the OCV is stuck in the retard position. • The variable valve timing actuator is stuck in the retard position. • The following oil runners are clogged or have leakage. Oil runners • Between the oil pressure switch and OCV • Between the OCV and variable valve timing actuator • In the variable valve timing actuator • Loose timing belt or improper valve timing due to timing belt slippage • PCM malfunction


STEP	INSPECTION		ACTION
1	PERFORM DTC CONFIRMATION PROCEDURE • Perform the DTC CONFIRMATION PROCEDURE. (See DTC CONFIRMATION PROCEDURE.) • Is the same DTC present?	Yes	Go to the next step.
1		No	Intermittent concern exists. Go to the INTERMITTENT CONCERN TROUBLESHOOTING procedure. (See INTERMITTENT CONCERN TROUBLESHOOTING.)
2	VERIFY RELATED PENDING CODE OR STORED DTCS • Is DTC P1384 present?	Yes	Go to the DTC P1384 troubleshooting procedure. (See DTC P1384.)
2		No	Go to the next step.
3	VERIFY ENGINE OIL PRESSURE • Start the engine. • Does the oil pressure warning light illuminate?	Yes	Inspect the engine oil pressure. (See OIL PRESSURE INSPECTION [ZJ, ZY].)
3		No	Go to the next step.
4	VERIFY TIMING BELT INSTALLATION • Stop the engine. • Remove the timing belt cover. • Is the camshaft timing mark at correct the point? (See TIMING CHAIN REMOVAL/INSTALLATION [ZJ, ZY].)	Yes	Go to the next step.
4		No	Reinstall the timing belt, then go to Step 7.
5	INSPECT OCV FOR MALFUNCTION • Stop the engine. • Remove the OCV. • Inspect the position of the spool valve in the OCV. • Is the spool valve located at valve retard position?	Yes	VARIABLE VALVE TIMING MECHANISM IS NORMAL Note • This DTC is detected as intermittent concern. • The Intermittent concern might be removed during the cleaning mode of the variable valve timing control function. Go to the next step.
5		No	Replace the OCV, then go to Step 7.
6	INSPECT ENGINE OIL RUNNER • Inspect the following engine oil runners for clogging or leakage. - Between the oil pressure switch and OCV - Between OCV and variable valve timing actuator - In the variable valve timing actuator • Is there any clogging or leakage?	Yes	Repair or replace the suspected runner, then go to the next step.
6		No	VARIABLE VALVE TIMING MECHANISM IS NORMAL Note • This DTC is detected during the intermittent concern. • Intermittent concern might be removed during the cleaning mode of variable valve timing control function. Go to the next step.
7	VERIFY TROUBLESHOOTING OF DTC P0012 COMPLETED • Make sure to reconnect all disconnected connectors. • Turn the ignition switch to the ON position (Engine off). • Clear the DTC from the PCM memory using the WDS or equivalent. • Start the engine. • Access the RPM PID using the WDS or equivalent. • Warm up the engine completely. • Turn off all electrical loads. • Increase and keep the engine speed at 2,500 rpm or more for 10 s. • Is PENDING CODE same as DTC present?	Yes	Replace the PCM, then go to the next step. (See PCM REMOVAL/INSTALLATION.)
7		No	Go to the next step.
8	VERIFY AFTER REPAIR PROCEDURE • Perform the "AFTER REPAIR PROCEDURE". (See AFTER REPAIR PROCEDURE.) • Are any DTCs present?	Yes	Go to the applicable DTC troubleshooting. (See DTC TABLE.)
8		No	Troubleshooting completed.