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DTC P0012 [L3 Turbo]

id0102b7801700

DTC P0012 | CMP Timing over-retarded
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DETECTION CONDITION | • Actual valve timing is over-retarded by 5 ° (when the following conditions are met) 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 above 70-110 °C {158-230 °F}. Diagnostic support note • This is a continuous monitor (CCM). • 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. • DTCs are stored in the PCM memory.
POSSIBLE CAUSE | • OCV (oil control valve) malfunction • Low engine oil pressure • Spool valve in OCV (oil control valve) is stuck in the retard position. • Variable valve timing actuator is stuck in the retard position. • Following oil runners are clogged or have leakage. Oil runners • Between oil pressure switch and OCV (oil control valve) • Between OCV (oil control valve) and variable valve timing actuator • In variable valve timing actuator • Loose timing chain or improper valve timing due to timing chain slippage • PCM malfunction

Diagnostic procedure

STEP | INSPECTION | ACTION
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1 | VERIFY FREEZE FRAME DATA AND DIAGNOSTIC MONITORING TEST RESULTS HAS BEEN RECORDED • Has FREEZE FRAME DATA been recorded? | Yes | Go to the next step.
No | Record the FREEZE FRAME DATA on the repair order, then go to the next step.
2 | VERIFY RELATED REPAIR 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.
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 [L3 Turbo] or DTC P2089 [L3 Turbo].)
No | Go to the next step.
4 | VERIFY ENGINE OIL PRESSURE • Start the engine. • Does the oil pressure warning light illuminate? | Yes | Inspect engine oil pressure. (See OIL PRESSURE INSPECTION [L8, LF, L3, L3 Turbo].)
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 the correct point? (See TIMING CHAIN REMOVAL/INSTALLATION [L3 Turbo].) | Yes | Go to the next step.
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 is detected as an intermittent concern. • The intermittent concern might be removed using the cleaning mode of the variable valve timing control function. Go to the next step.
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 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.
No | VARIABLE VALVE TIMING MECHANISM IS NORMAL Note • This DTC is detected as an intermittent concern. • The intermittent concern might be removed using the 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 WDS or equivalent. • Turn the ignition switch off. • Start the engine and warm it up completely. • Is PENDING CODE for this DTC present? | Yes | Replace the PCM, then go to the next step. (See PCM REMOVAL/INSTALLATION [L3 Turbo].)
No | Go to the next step.
9 | VERIFY AFTER REPAIR PROCEDURE • Perform the "After Repair Procedure". (See AFTER REPAIR PROCEDURE [L3 Turbo].) • Are any DTCs present? | Yes | Go to the applicable DTC inspection. (See DTC TABLE [L3 Turbo].)
No | Troubleshooting completed.