DTC P0012:00 [ZJ, ZY]

id0102c0700200

DTC P0012:00

CMP-timing over-retarded

DETECTION CONDITION

•  If the actual valve timing retards excessively against the target valve timing with the following condition met:

―  Variable valve timing control: feedback hold mode

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

•  Engine oil malfunction

―  Low engine oil pressure

―  Improper engine oil viscosity

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

•  OCV malfunction

―  Spool valve in OCV is stuck in retard position

•  Following oil runners are clogged or have leakage:

•  Between oil pressure switch and OCV

•  Between OCV and variable valve timing actuator

•  In variable valve timing actuator

•  Variable valve timing actuator is stuck in retard position

•  PCM malfunction

DTC P0012:00	CMP-timing over-retarded
DETECTION CONDITION	• If the actual valve timing retards excessively against the target valve timing with the following condition met: ― Variable valve timing control: feedback hold mode 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	• Engine oil malfunction ― Low engine oil pressure ― Improper engine oil viscosity • Loose timing chain or improper valve timing due to timing chain slippage • OCV malfunction ― Spool valve in OCV is stuck in retard position • Following oil runners are clogged or have leakage: • Between oil pressure switch and OCV • Between OCV and variable valve timing actuator • In variable valve timing actuator • Variable valve timing actuator is stuck in retard position • PCM malfunction

Diagnostic procedure

STEP	INSPECTION		ACTION
1	VERIFY FREEZE FRAME DATA HAS BEEN RECORDED • Has the 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 ENGINE OIL PRESSURE • Start the engine. • Does the oil pressure warning light illuminate?	Yes	Inspect engine oil pressure. (See OIL PRESSURE INSPECTION [ZJ, ZY].) Repair or replace the malfunctioning part according to the inspection results, if necessary. Go to Step 7.
3		No	Go to the next step.
4	INSPECT INSTALLATION OF TIMING CHAIN • Inspect the installation of timing chain. (See TIMING CHAIN REMOVAL/INSTALLATION [ZJ, ZY].) • Is the camshaft timing mark at correct point?	Yes	Go to the next step.
4		No	Reinstall the timing chain, then go to Step 7. (See TIMING CHAIN REMOVAL/INSTALLATION [ZJ, ZY].)
5	INSPECT OCV • Stop the engine. • Remove the OCV. (See OIL CONTROL VALVE (OCV) REMOVAL/INSTALLATION [ZJ, ZY].) • Inspect position of the spool valve in the OCV. (See OIL CONTROL VALVE (OCV) INSPECTION [ZJ, ZY]) • Is the spool valve located at valve retard position?	Yes	Variable valve timing mechanism is normal. Note • This DTC is detected by intermittent concern. • Intermittent concern might be removed by cleaning mode of variable valve timing control function. Go to the next step.
5		No	Replace the OCV, then go to Step 7. (See OIL CONTROL VALVE (OCV) REMOVAL/INSTALLATION [ZJ, ZY].)
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 by intermittent concern. • Intermittent concern might be removed by cleaning mode of variable valve timing control function. Go to the next step.
7	VERIFY DTC TROUBLESHOOTING 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 M-MDS. (See AFTER REPAIR PROCEDURE [ZJ, ZY].) • Start the engine. • Perform the PID/DATA Monitor and Record Procedure and access the RPM PID. (See ON-BOARD DIAGNOSTIC TEST [ZJ, ZY].) • Warm up the engine completely. • Turn off all electrical roads. • Increase and keep the engine speed 2,500 rpm or more for 10 s. • Perform the KOER self test. (See KOEO/KOER SELF TEST [ZJ, ZY].) • Is the PENDING CODE for this DTC present?	Yes	Replace the PCM, then go to the next step. (See PCM REMOVAL/INSTALLATION [ZJ, ZY].)
7		No	Go to the next step.
8	VERIFY AFTER REPAIR PROCEDURE • Perform the “AFTER REPAIR PROCEDURE”. (See AFTER REPAIR PROCEDURE [ZJ, ZY].) • Are any DTCs present?	Yes	Go to the applicable DTC inspection. (See DTC TABLE [ZJ, ZY].)
8		No	DTC troubleshooting completed.