Checking Components

Remove the camshaft reset valve. Check the oil ducts for the cylinder head for the camshaft reset valve (intake) for blockages and dirt.

Remedy as necessary.

Try a new camshaft reset valve (intake) if the above remedy does not solve the fault.

HINT: The fault can also be caused by a damaged variable valve timing unit. The variable valve timing unit may be damaged if the above fault-tracing and corrective action do not remedy the fault. 

Other information: 

• see VVT SOLENOID
• see VVT UNIT

Fig 1: Identifying Variable Valve Timing (VVT) Unit

Courtesy of VOLVO CARS CORPORATION

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  Refer to VERIFICATION