Checking Components

For variable valve timing control to operate correctly the engine oil must be at the correct level, of the correct quality and not contaminated.

Check the engine oil level and quality. Check for contaminants in particular.

If this diagnostic trouble code (DTC) is stored, the most likely fault cause is one of the following:

• Camshaft belt incorrectly seated
• Incorrect basic setting for the timing belt
• Faulty camshaft reset valve (the slide in the valve has stuck).

HINT: First try adjusting the basic setting of the camshaft. Then read off the camshaft discrepancy at idle speed with the engine at operating temperature. The normal value is 27°CA (+/-8°CA). If the value is incorrect when the basic setting of the camshaft is correct, try cleaning the camshaft reset valve. 

Try a new camshaft reset valve if the above fault-tracing does not remedy the fault.

Remedy as necessary.

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 Camshaft seal/variable valve timing (VVT) unit, replacing

Fig 1: Identifying VCT2000 Diagnostic Tool Symbol In VIDA

Courtesy of VOLVO CARS OF NORTH AMERICA.

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  Refer to Verification