Amazon Cyber Monday 2020
IPD sale XeMODeX - Experts in Volvo Electronics

Get email notification of topic replies. Log in or register (free). Amazon Link Buy anything with this and it helps MVS!

driver side mirror Ambient Air Temperature is -198.40 F

Help, Advice, Owners' Discussion and DIY Tutorials on Volvo's stylish, distinctive "P2" platform cars.

2001 - 2007 V70
2004 - 2007 V70 R
2001 - 2007 XC-70
2001 - 2009 S60
2003 - 2007 S60 R

Post Reply
Posts: 2
Joined: Thu Mar 15, 2018 2:18 am
Year and Model: 2004 Volvo S60 2.5T
Location: Seattle

driver side mirror Ambient Air Temperature is -198.40 F

Post by autoshiftin »

Has anyone experienced this before? My ambient air temperature sensor reading from the driver door side mirror is -198.40 F. Yes, that is pretty cold, and of course wacky. There are no codes at all, no check engine lights, not even one for "temperature out of range" which logically should be present. The other ambient air temp sensor in the passenger door side mirror is fine, and sends the temperature to the dash for the driver. I am wondering about this -198F since I believe this temp reading is supposedly sent to the ECM for engine and fuel management. So it would then seem that my car thinks it is driving in freezing Arctic temperatures Ugh.

Since the sensor is surely the original one from ~2004 year of manufacture, I went ahead and replaced the sensor with a new one, OEM Volvo. After installation of the new temp sensor, I was surprised to see the same temperature reading of -198.40 F on the scanner. Can anyone assist on any tips and direction to go on this? Thanks.
ambient drver side1.JPG
ambient drver side1.JPG (143.16 KiB) Viewed 128 times
User avatar
Posts: 404
Joined: Fri Mar 06, 2020 6:25 am
Year and Model: 2001 v70xc M58
Location: australia
Has thanked: 4 times
Been thanked: 22 times

Re: driver side mirror Ambient Air Temperature is -198.40 F

Post by darrylrobert »

my cars left mirror (ECM) reads 0c. right mirror (DIM) is correct at 25c.

Ive asked on here before and got no replies. I dont think anyone knows this mystery.

I have checked the sensor in the mirror and the values are within a correct range for reading 25c yet the car still reads 0c. Its eaither the wiring or ECM. I havent checked the wiring to the ECM because i am yet to find a wiring diagram for the sensor to ECM pins. I havent found out what this sensor does, i believe its a secondary (backup) sensor.
1981 260 GLE converted to 240 M46 after auto box failure
1987 740t auto converted to M47
1997 V70t5 auto converted to M56
1998 V70 factory M56 (parts car)
2001 XC70 factory M58
2002 XC70 auto (parts car)
Post Reply
  • Similar Topics
    Last post