Question about 2001 Volvo S60
Had this same problem with my car, a 2001 S60 T5. It turned out to be the temperature sensors mounted beneath the exterior mirrors -- you'll see a nipple under each mirror (and you can pop it out with a screwdriver).
One of these external sensors (forgot which side) is used by the engine management system. The other one is used for the inside temp gauge.
I found that one of them (I think the one under the passenger sie mirror, but don't quote me) had popped out, leading to my weird temp readings on the dashboard gauge. So I just popped the sensor back into the bottom of the mirror, and that solved the problem. Check both mirrors, though. If the sensors seem fine, maybe pop them out and then back in...and see if that works.
If that doesn't solve your problem, then you might have to replace the appropriate temp sensor (or worst case, the entire exterior mirror). Good luck!
Posted on Sep 27, 2008
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