DTC P0012[LF ATX (FN4A-EL), L3 ATX]

id0102b6801700

DTC P0012

CMP timing over-retarded

DETECTION CONDITION

•  Actual valve timing is over-retarded by 10° from the target valve timing for 5 s when the OCV system control is within the feed-back range.

Monitoring condition

―  Engine speed is below 4,000 rpm

―  Engine coolant temperature is 70—110°C {158—230°F}

Diagnostic support note

•  This is a continuous monitor (CCM).

•  The MIL illuminates if the PCM detects the above malfunction condition in two consecutive drive cycles or in one drive cycle while the DTC for the same malfunction has been stored in the PCM.

•  PENDING CODE is available if the PCM detects the above malfunction condition during the first drive cycle.

•  FREEZE FRAME DATA is available.

•  The DTC is stored in the PCM memory.

POSSIBLE CAUSE

•  Oil control valve (OCV) malfunction

•  Low engine oil pressure

•  Spool valve in the OCV is stuck in retard position.

•  Variable valve timing actuator is stuck in retard position.

•  Following oil runners are clogged or have leakage.

Oil runners

―  Between the oil pressure switch and the OCV

―  Between the OCV and the variable valve timing actuator

―  In variable valve timing actuator

•  Loose timing chain or improper valve timing due to the timing chain slippage

•  PCM malfunction

DTC P0012	CMP timing over-retarded
DETECTION CONDITION	• Actual valve timing is over-retarded by 10° from the target valve timing for 5 s when the OCV system control is within the feed-back range. Monitoring condition ― Engine speed is below 4,000 rpm ― Engine coolant temperature is 70—110°C {158—230°F} Diagnostic support note • This is a continuous monitor (CCM). • The MIL illuminates if the PCM detects the above malfunction condition in two consecutive drive cycles or in one drive cycle while the DTC for the same malfunction has been stored in the PCM. • PENDING CODE is available if the PCM detects the above malfunction condition during the first drive cycle. • FREEZE FRAME DATA is available. • The DTC is stored in the PCM memory.
POSSIBLE CAUSE	• Oil control valve (OCV) malfunction • Low engine oil pressure • Spool valve in the OCV is stuck in retard position. • Variable valve timing actuator is stuck in retard position. • Following oil runners are clogged or have leakage. Oil runners ― Between the oil pressure switch and the OCV ― Between the OCV and the variable valve timing actuator ― In variable valve timing actuator • Loose timing chain or improper valve timing due to the timing chain slippage • PCM malfunction

Diagnostic procedure

STEP	INSPECTION		ACTION
1	VERIFY FREEZE FRAME DATA HAS BEEN RECORDED • Has FREEZE FRAME DATA been recorded?	Yes	Go to the next step.
1		No	Record the FREEZE FRAME DATA on the repair order, then go to the next step.
2	VERIFY RELATED SERVICE INFORMATION AVAILABILITY • Verify related Service Information availability. • Is any related Service Information available?	Yes	Perform repair or diagnosis according to the available Service Information. • If the vehicle is not repaired, go to the next step.
2		No	Go to the next step.
3	VERIFY RELATED PENDING CODE OR STORED DTCS • Is DTC P2088 or P2089 present?	Yes	Go to the appropriate DTC troubleshooting procedure. (See DTC P2088[LF ATX (FN4A-EL), L3 ATX] or DTC P2089[LF ATX (FN4A-EL), L3 ATX].)
3		No	Go to the next step.
4	VERIFY ENGINE OIL PRESSURE • Start the engine. • Does the oil pressure warning light illuminate?	Yes	Inspect the engine oil pressure, then go to Step 8. (See OIL PRESSURE INSPECTION[LF, L3].)
4		No	Go to the next step.
5	VERIFY TIMING CHAIN INSTALLATION • Stop the engine. • Remove the timing chain cover. • Is the camshaft timing mark at correct point? (See TIMING CHAIN REMOVAL/INSTALLATION[LF, L3].)	Yes	Go to the next step.
5		No	Reinstall the timing chain, then go to Step 8.
6	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 the valve retard position?	Yes	VARIABLE VALVE TIMING MECHANISM IS NORMAL Note • This DTC detected by intermittent concern. • Intermittent concern might be removed by cleaning mode of the variable valve timing control function. Go to the next step.
6		No	Replace the OCV, then go to Step 8.
7	INSPECT ENGINE OIL RUNNER • Inspect the following engine oil runners for clogging or leakage. ― Between oil pressure switch and OCV ― Between OCV and variable valve timing actuator ― In variable valve timing actuator • Is there any clogging or leakage?	Yes	Repair or replace the suspected runner, then go to the next step.
7		No	VARIABLE VALVE TIMING MECHANISM IS NORMAL Note • This DTC is detected by intermittent concern. • Intermittent concern might be removed by cleaning mode of the variable valve timing control function. Go to the next step.
8	VERIFY TROUBLESHOOTING OF DTC P0012 COMPLETED • Make sure to reconnect all disconnected connectors. • Clear the DTC from the PCM memory using the M-MDS. • Turn the ignition switch off. • Start the engine and warm it up completely. • Is the PENDING CODE for this DTC present?	Yes	Replace the PCM, then go to the next step. (See PCM REMOVAL/INSTALLATION[LF, L3].)
8		No	Go to the next step.
9	VERIFY AFTER REPAIR PROCEDURE • Perform the “AFTER REPAIR PROCEDURE”. (See AFTER REPAIR PROCEDURE[LF ATX (FN4A-EL), L3 ATX].) • Is there any DTC present?	Yes	Go to the applicable DTC inspection. (See DTC TABLE[LF ATX (FN4A-EL), L3 ATX].)
9		No	Troubleshooting completed.