okay mine did this when I changed the wing mirror.
Try this:
turn on the radio without having the key in the ignition and leave it for 5 minutes. You should see it "calibrating" itself.
If this doesn't work I might have had the ignition turned to first position with the radio on or possibly the second position.
anyhow - try them all and let us know if it helps!
I know this coz I [foolishly?] plugged in the temp sensor whilst the engine was running coz it was a cold day and I wanted the heater on! It kept saying -1 but it was actually 9c outside.
Similar issue, my temp sensor is massively over-reading, saying today it was 40'c which it clearly wasnt. Shall i try the above or just replace the sensor in the wing mirror?
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