Mechanics

ECM 640A CAMSHAFT RESET VALVE

2002 Volvo S80 • 107,000 miles

Hi I ownn s80 2002 107000 2, 4l manual petrol but after timming belt changed came up on my dash board engine light ECM640A camshaft reset valve so wot did that mean and also do I need to replace camshaft sensor coz after deleting all faulty codes car works perfect but after 2-3mils driving everythings commin back as it was be4 I mean car hasnt power. Thx
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Markiemark79
March 10, 2012.




Likely a clogged/faulty intake camshaft solenoid valve.
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Tiny
Fixitmr
Mar 10, 2012.
If light came on after the belt change that you could be off a tooth or two. Recheck that timing marks line up.

JIS001
Mar 11, 2012.

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