Code p1280 is the Injector Control Pressure Sensor (ICP) sensor (CKT Low) , it is located behind the altenator , this costs $259.99 at Advanced Auto . In order to replace it you have to remove the belt and the three bolts that hold the alternator and after negative cable is disconnected move altenator out of the way and use an open end wrench to remove ICP Sensor . First off though clean the connection really good inside to see if oil in the connection is the problem . GOOD LUCK !!

 

Excellent first post mdayz28! Helpful and informative, I'm reppin ya. Another dimension of helpful posting is timeliness; this thread is seven years old.