DTC P0012 [L8, LF]

id0102b1801700

DTC P0012

CMP timing over-retarded

DETECTION CONDITION

•  The actual valve timing is over-retarded by 10 ° from the target valve timing for specified period when the OCV system control is within the feedback range.

MONITORING CONDITIONS

―  Engine coolant temperature: above 63 °C {145.4 °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 (Mode 2/Mode 12) is available.

•  The DTC is stored in the PCM memory.

POSSIBLE CAUSE

•  Low engine oil pressure

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

•  OCV malfunction (spool valve in the OCV is stuck in retard position)

•  The following oil runners are clogged or have leakage:

―  Between the oil pressure switch and the OCV

―  Between the OCV and the variable valve timing actuator

―  In the variable valve timing actuator

•  PCM malfunction

DTC P0012	CMP timing over-retarded
DETECTION CONDITION	• The actual valve timing is over-retarded by 10 ° from the target valve timing for specified period when the OCV system control is within the feedback range. MONITORING CONDITIONS ― Engine coolant temperature: above 63 °C {145.4 °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 (Mode 2/Mode 12) is available. • The DTC is stored in the PCM memory.
POSSIBLE CAUSE	• Low engine oil pressure • Loose timing chain or improper valve timing due to timing chain slippage • OCV malfunction (spool valve in the OCV is stuck in retard position) • The following oil runners are clogged or have leakage: ― Between the oil pressure switch and the OCV ― Between the OCV and the variable valve timing actuator ― In the variable valve timing actuator • PCM malfunction

Diagnostic procedure

STEP	INSPECTION		ACTION
1	VERIFY FREEZE FRAME DATA (MODE 12) HAS BEEN RECORDED • Has the FREEZE FRAME DATA (Mode 12) been recorded?	Yes	Go to the next step.
1		No	Record the FREEZE FRAME DATA (Mode 12) 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 AND STORED DTC • Turn the ignition switch off, then to the ON position. • Perform the Pending Trouble Code Access Procedure and DTC Reading Procedure. (See ON-BOARD DIAGNOSTIC TEST [L8, LF].) • Is the DTC P2088 or P2089 also present?	Yes	Go to the appropriate DTC troubleshooting. (See DTC P2088 [L8, LF].) (See DTC P2089 [L8, LF].)
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. (See OIL PRESSURE INSPECTION [L8, LF].) Repair or replace the malfunctioning part according to the inspection results, then go to Step 8.
4		No	Go to the next step.
5	VERIFY TIMING CHAIN INSTALLATION • Stop the engine. • Remove the timing chain cover. (See TIMING CHAIN REMOVAL/INSTALLATION [L8, LF].) • Is the camshaft timing mark at the correct point?	Yes	Go to the next step.
5		No	Reinstall the timing chain, then go to Step 8. (See TIMING CHAIN REMOVAL/INSTALLATION [L8, LF].)
6	INSPECT OCV FOR MALFUNCTION • Stop the engine. • Remove the OCV. (See OIL CONTROL VALVE (OCV) REMOVAL/INSTALLATION [L8, LF].) • Inspect the position of the spool valve in the OCV. (See OIL CONTROL VALVE (OCV) INSPECTION [L8, LF].) • Is the spool valve located at the valve retard position?	Yes	Replace the OCV, then go to Step 8. (See OIL CONTROL VALVE (OCV) REMOVAL/INSTALLATION [L8, LF].)
6		No	Variable valve timing mechanism is normal. Note • This DTC is detected as an intermittent concern. • An intermittent concern might be removed using the cleaning mode of the variable valve timing control function. • Go to the next step.
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 as an intermittent concern. • An intermittent concern might be removed using the cleaning mode of the variable valve timing control function. • Go to the next step.
8	VERIFY DTC TROUBLESHOOTING COMPLETED • Make sure to reconnect all disconnected connectors. • Clear the DTC from the PCM memory using the M-MDS. (See AFTER REPAIR PROCEDURE [L8, LF].) • Turn the ignition switch off. • Start the engine and warm it up completely. • Perform the KOER self test. (See KOEO/KOER SELF TEST [L8, LF].) • Is the PENDING CODE for this DTC present?	Yes	Replace the PCM, then go to the next step. (See PCM REMOVAL/INSTALLATION [L8, LF].)
8		No	Go to the next step.
9	VERIFY AFTER REPAIR PROCEDURE • Perform the “AFTER REPAIR PROCEDURE”. (See AFTER REPAIR PROCEDURE [L8, LF].) • Are any DTCs present?	Yes	Go to the applicable DTC troubleshooting. (See DTC TABLE [L8, LF].)
9		No	DTC troubleshooting completed.