I did more research. I want you to check the O2 sensor for a ground issue. I have attached a schematic. Here is what I need you to do. You need to check voltage to the sensor. You should get a.45 volt reference power supply from the control module. Check that. Also, with the engine warmed up, you should get between.35 and.55 voltage reading off idle.
As far as the wires you are looking for, ECM terminal C7 is a purple wire from the ECM (power supply) and C8 is a tan wire (ground). Based on everyting I read, that sounds like where the problem is coming from. Just keep your fingers crossed that it is a bad ground.
Sunday, December 26th, 2010 AT 6:21 AM