P1656

DTC P1656 OCV Circuit Malfunction (Bank 1)

DTC Detection Condition:

CIRCUIT DESCRIPTION
VVT system controls the intake valve timing properly according to the driving condition. ECM controls OCV (Oil Control Valve) to make the intake valve timing properly, and oil pressure controlled with OCV is supplied to the VVT controller. And then the VVT controller changes relative position between the camshaft and the crankshaft.

Wiring Diagram:

INSPECTION PROCEDURE

HINT: Read freeze frame data using the hand-held tester or OBD II scan tool, as freeze frame data records the engine conditions when the malfunction is detected. When troubleshooting, it is useful for determining whether the vehicle was running or stopped, the engine was warmed up or not, the air-fuel ratio was lean or rich, etc. at the time of the malfunction.

Step 1 - 2:

Step 3 - 4:

Hand-held tester

Step 1 - 2:

Step 3:

OBD II scan tool (excluding hand-held tester)