hi there, i have a sierra 3 door cosworth with an escort cossie 4x4 engine fitted to it.....the dash light has started to show that the coolant is low....however on inspection i have full coolant so can only assume its a sensor gone wrong....which sensor is responsible for this and where can i locate it on my engine...

Cheers for the help guys...

P.S. will it affect the way my car runs if ecu has didgy reading from this sesnor cos its been ascting up lately

DAN