Check the wiring that goes to the sensor before you condem the sensor itself.gazza, had warning light flick on and off slowly whilst going round a roundabout, then stay on. had a code read when the car was in at JJB motors, on examiner, turns out the coolant temp sensor has an intermittent open circuit, ie, its buggered.
Nope.The temp gauge runs on a different sensor to the coolant sensor.
The ECU uses the sensor fitted to the thermostat housing. The gauge uses a sensor screwed in the cylinder head about 4" back from the thermostat.