Temp gauge gone crazy!

[Gusman]

My 2003 Multispace 1.4 petrol has been doing something strange. Every now and then after driving for a while (time varies) the temp gauge suddenly and quickly goes into the red and it beeps and the stop light comes on.
When I check it the engine is not hot or overheating but normal driving temp. Any ideas?

[3rensho]

I'd check the temperature sensor as a first action. Check electrical connection for corrosion and a good fit as well. Any error codes visible via code reader?

[Gusman]

Thanks. Any idea where that sensor is?

[steve valentine]

It's on the thermostat housing generally.

[Les]

My 1.9 Multispace done the same a couple of months back got it sorted when I ordered a censor from my local motor accessory shop it cost £18 and took 5 minutes to fit.Have some spare coolant handy as you loose some.