temperature reading?

[ludwigdohne]

So i was travelling from bloem to pe yesterday and about a 100km before pe my temperature meter just starting going up and down the whole time one moment its on one bar and the next its between half and a quarter (where it usually is) it kept doing this and the after awhile it didn't show anything and then it started going up and down

Any advice please???

 

[Jughead]