I put a new battery into my multimeter and checked the resisitence through the temp sensor - it reads 5000 Ohms cold and 20 ohms hot; so is working. I reckon its something else.

Could it be the throttle body?

The mer deasler wants £150 GBP for 1 hours of diagnostic!! Sounds pricy; so looking for a solution in the mean time.

Thx