i have a v70 xc 1999 model and after driving for a few minutes the speedometr and odometer both quit . if you know about this please help me i was told it was the vss sensor so i replaced it but it did not work

Interesting. I have a '99 R model that has started to do the same thing. Though ours is intermittant (will quit, then come back to life). Check Engine and upshift arrow are also being lit, but they will reset themselves as well. Car seems to run just fine, though on occasion, when the speedometer quits, the transmission seems to go into "winter driving" mode such that pulling away from a stop sign feels like it's locked in 2nd gear.

vfrhon, did you ever get yours solved?

-Jay

I have seen this before im thinking that the speedo cluster is faulty.It is part of a network in the car and when they either short or are removed they drive the car nuts!They really wont set any codes but possibly a communication problem code.There is one other possibility that it is a software related problem.

Well, it took a while, but I think the problem has been solved. It appears to be a faulty transmission sensor.

I took it twice to an independent shop in town that does almost nothing but Volvos but he was unable to track it down. So I bit the bullet and took it to the dealer. The tech apparently had a lot of years of experience and between his equipment and a gut hunch, he seems to have fixed it. The rationale was that this sensor fed the data for the speedo, odo, and shifting. When it went bad, those items didn't know what to do.

The bill was about $280.

-Jay

I'm glad you got it fixed.Those sensors dont go bad often.I'm glad that is all it was and it didn't cost you and arm and a leg.