Fuel 14

It seems that your temperature sensor/circuit was/is sensed by the computer to have/had an issue.

The sensor is a two wire do-dad up close to the thermostat housing. That is of course if you are Talking about a Jaguar XJ40 and not some Rover. ;-)

Clean the wire connection and also the single wired temp sensor close by. Reset your computer (Make note of your radio security code and disconnect your battery for about 30 seconds) and see if the code reappears. If it does then your sensor may be out of calibration and should be replaced.

Cheers, B.D.