ok so its been afew weeks now with the same problem been to the garage for the last 2 weeks and now it would appear that the fault is down to the motor on the throttle body , my question is can i open the casing and see if the fault is with the circuit boad ?? seen that it can be done on a 150 in the how 2 section ? my vectra is a 1.8 16 valve on a 2003 any help welcome also came up with second lambda sencor at fault not sure if it could be that that causing running proplem from cold either