Hi there you need to disconnect the battery, (make sure you have the radio code at hand) then disconnect the injection computer,and also check the wiring going to the computer ,make sure if it has a steel bracket on the computer ,that the bracket has not cut through any of the wires, leave the computer disconnected for 5 mins then reconnect the computer then the battery, and see if this cures you fault,if not you might need to remove the throttle body which is in the inlet manifold and clean it ,if that dont work you need to have the fault code read on a dianostic equipment,hope that helps.
mark
July 2008