DTC P0021: CMP Timing Over-Advanced (LH): Notes

DTC P0021 CHART (MZI-3.7)

DTC P0021	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