Thanks Colin. The thing is , the car isn't running properly , but I think ill check all the earths, continuity as a starting point . do you know if any of the sensors share any supplies / earths in common . Or any good places to start on the electrical side with regards to cabling / connections on the ECU itself , or any fuses that could relate to this issue . I cant help thinking that the recent wet weather may have had something to do with it