Here's a strange one...
 

...discuss. Very cool indeed ;) . And I have no idea.....

Brrr - where did you drive too then?

Photo taken early this evening in Altrincham.... :rolleyes:

Open circuit on the external temperature sensor. Could be the connector under the passenger side headlight, or the sensor has just failed. Bumper off to swap it :)

That makes sense -40C is probably the lowest the "system" will compute.

Also happens to be -40F, so you can get the same lower limit in the USA!

I have seen that temperature on a car before, but it was my old Ford Focus and the external temp sensor was: a) optional to display and b) easy to swap.

It returned to normal after 10 minutes driving: the "environmental condition" that seemed to cause this anomaly was leaving the engine running whilst jet washing the car (don't ask...).

Strange all the same...

Ah - Altrincham - makes sense now :p

My money would be on the jet wash being the cause - worth checking for any loose connections

Is it a time machine too??

Was the battery low-ish charge wise by any chance?