Posted by Martin Cummins on September 19, 2008, 12:32 pm
Hi Guys can anybody help please, got a vectra with code faults, P0120 TPS circuit 1 voltage high & P1550 Electronic throttle control reduced power, TPS circuit 1 voltage from cold 0.68v, as soon as temp gets to around 46c voltage increases to 5.00v. tested all wiring from tps to ecu all ok, have fitted second hand throttle body but fault was there even when cold. does anyone have test readings for the throttle body on this car to help me test it or suggestions.