DTC P0012 [L3]


DTC P0012	CMP - Timing over-retarded
DETECTION CONDITION	• The actual valve timing is over-retarded by 5 deg. from the target valve timing for 5 s when the OCV system control is within the feedback range. Diagnostic support note • This is a continuous monitor (CCM). • The MIL illuminates if the PCM detects the above malfunction condition during 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 (oil control valve) malfunction • Low engine oil pressure • The spool valve in the OCV (oil control valve) is stuck in the retard position. • The variable valve timing actuator is stuck in the retard position. • The following oil runners are clogged or leaking. Oil runners • Between the oil pressure switch and the OCV (oil control valve) • Between the OCV (oil control valve) and the 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 [LF, L3].) • 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 [LF, L3].)
2	VERIFY RELATED PENDING CODE OR STORED DTCS • Is DTC P0010 present?	Yes	Go to the DTC P0010 troubleshooting procedure. (See DTC P0010 [L3])
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 [LF, L3])
3		No	Go to the next step.
4	VERIFY TIMING BELT INSTALLATION • Stop the engine. • Remove timing belt cover. • Is the camshaft timing mark at the correct point? (See TIMING CHAIN REMOVAL/INSTALLATION [LF, L3].)	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 the valve in the OCV. • Is the spool valve located at the valve retard position?	Yes	VARIABLE VALVE TIMING MECHANISM IS NORMAL Note • This DTC is detected as an 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 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 the OCV - Between the OCV and the 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 as an intermittent concern. • The 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. • Clear the DTC from the PCM memory using the WDS or equivalent. • Perform the KOER self-test. (See KOEO/KOER SELF-TEST [LF, L3].) • Is the same DTC present?	Yes	Replace the PCM, then go to the next step. (See PCM REMOVAL/INSTALLATION [LF, L3].)
7		No	Go to the next step.
8	VERIFY AFTER REPAIR PROCEDURE • Perform the "After Repair Procedure". (See AFTER REPAIR PROCEDURE [LF, L3].) • Are any DTCs present?	Yes	Go to the applicable DTC troubleshooting. (See DTC TABLE [LF, L3].)
8		No	Troubleshooting completed.