DTC P1656: Oil Control For VVT Valve Malfunction: Notes

CAUTION: If ECM replacement is instructed in following tests, always ensure ECM connectors and ground circuits are okay. If either are suspect, repair and repeat testing to confirm ECM malfunction.

NOTE: 2ZZ-GE engine has 2 Oil Control Valves (OCV). Variable Valve Timing (VVT) OCV, located on timing chain side of cylinder head, controls variable valve timing. Variable Valve Lift (VVL) OCV is located on transaxle side of cylinder head and controls variable valve lift.