Question about 2001 Volvo S60

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I have a 2001 S60 T5 that occasionally reports (via the dashboard gauge) that the ambient temperature is 30-40 degrees Fahrenheit lower than reality. Furthermore, my A/C has been acting strangely. I understand that the ambient temperature sensor for the dashboard gauge is under the passenger side mirror, and the corresponding sensor for the ECC is under the driver side mirror. Do I need to replace both these sensors, or should I start by removing the door panel and checking the wiring? I work on my car a bit, so I think I can handle it myself...but how do I know if it's the wiring or rather the sensors themselves? What steps should I remove the door panels, check the wiring, diagnose, etc.? Thanks

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It's either the sensor, wiring or the module that interprets the temperature, I believe.

I have a 1999 Ford Expedition that reports a false low temperature as well, It started doing this after I washed the car, and intermittently does report a temperature lower than reality.

Good luck fixing this problem.

Posted on Jul 04, 2010

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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).

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