VVT solenoid, Cleaning – 2001-2006 Volvo

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S60/S80/C70/V70 (01-)/V70XC (01-)/XC70/XC90 2002-

Section Group No. Year Month
2 21 0051 04 02


Vehicles involved: Gasoline engines 2002- with Bosch engine management systems.


VVT solenoid, cleaning



This service bulletin describes a possible reason for one or more of the following symptoms:

  • Diagnostic trouble codes 640A, 641A, 643A, 644A, 640F, 641F
  • Engines appears to lack acceleration power
  • Knocking and rattling from engine

These symptoms may be caused by sticking of the VVT solenoid plunger due to impurities (metal filings ) left by the manufacturing process. If these symptoms are present, the VVT solenoid must be inspected and cleaned as described below. This procedure does not apply to cars equipped with Denso engine management systems, engine code 61 and 64.



Description Quantity Part No.
Seal 1 1275569



VVT solenoid, inspection and cleaning



Remove VVT solenoid from camshaft cover.

Blow through center hole with compressed air.

Air should emerge from inner hole (1) nearest coil.

VVT solenoid



Connect power to solenoid. Solenoid should click.

Blow through center hole with compressed air.

Air should emerge from outer hole (2).

If plunger is sticking or solenoid fails to operate electrically, the direction of flow will be unchanged from step 1.

VVT solenoid



VVT solenoid, cleaning

Remove solenoid from aluminum housing.

VVT solenoid




  • snap ring (1)
  • washer (2), spring (3) and plunger (4).

Inspect and clean all parts.

Blow out aluminum housing.

Oil parts with engine oil.

Reassemble solenoid.

Check operation as described in operations 1 and 2.

Reinstall solenoid in car using new seal.

VVT solenoid




Erase diagnostic trouble codes.

Test-drive car.

Check that no new diagnostic trouble codes are displayed.

If new codes are displayed, continue troubleshooting as per VADIS.


WARRANTY STATEMENT: Claims may be submitted under the New Car Warranty when there is a documented customer complaint, using claim type 01.

Operation No. Labor description Time allowance
21915-2 CVVT Solenoid Cleaning C70/S60/S80 B6294S/S80

B6284T/V70 (01-)/V70XC (01-)/XC70/XC90 5-Cyl

0.5 hr
21915-2 CVVT Solenoid Cleaning S80 B6294T/XC90 B6294T 1.1 hr


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