DTC P0021:00 [MZI-3.7]

id0102d2311000

DTC P0021:00

CMP timing over-advanced (LH)

DETECTION CONDITION

•  The PCM monitors the variable valve timing position for an over-advanced camshaft timing. The test fails when the camshaft timing exceeds a maximum calibrated value or remains in an advanced position.

POSSIBLE CAUSE

•  Spool valve in OCV (LH) is stuck in advanced position

•  Improper valve timing due to timing chain slippage

•  OCV (LH) malfunction

DTC P0021:00	CMP timing over-advanced (LH)
DETECTION CONDITION	• The PCM monitors the variable valve timing position for an over-advanced camshaft timing. The test fails when the camshaft timing exceeds a maximum calibrated value or remains in an advanced position.
POSSIBLE CAUSE	• Spool valve in OCV (LH) is stuck in advanced position • Improper valve timing due to timing chain slippage • OCV (LH) 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 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 TIMING CHAIN INSTALLATION • Stop the engine. • Remove the front cover. • Is the camshaft timing mark at the correct point? (See TIMING CHAIN REMOVAL/INSTALLATION [MZI-3.7].)	Yes	Go to the next step.
3		No	Reinstall the timing chain, then go to Step 5.
4	INSPECT OCV (LH) • Inspect the OCV (LH). (See OIL CONTROL VALVE (OCV) INSPECTION [MZI-3.7].) • Is there any malfunction?	Yes	Replace the OCV (LH), then go to the next step. (See OIL CONTROL VALVE (OCV) REMOVAL/INSTALLATION [MZI-3.7].)
4		No	Go to the next step.
5	VERIFY TROUBLESHOOTING OF DTC P0021:00 HAS BEEN 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 same DTC present?	Yes	Repeat the inspection from Step 1. • If the malfunction recurs, replace the PCM. (See PCM REMOVAL/INSTALLATION [MZI-3.7].) Go to the next step.
5		No	Go to the next step.
6	VERIFY AFTER REPAIR PROCEDURE • Perform the “AFTER REPAIR PROCEDURE”. (See AFTER REPAIR PROCEDURE [MZI-3.7].) • Are any DTCs present?	Yes	Go to the applicable DTC inspection. (See DTC TABLE [MZI-3.7].)
6		No	Troubleshooting completed.