Engine bay harness

Spooler

Plug in your OBDII and clear the codes, leave it hooked up and go around and wiggle the wires in the loom. Watch for the code to pop back in. It is best to have your scanner where you can see it in the engine bay. When that happens, you are close to the area with the problem. Double check the area by doing it a couple of times. Break open the harness and look for the correct colored wire. May need FSM to get the proper color and tracer color. Put the wire between 2 finger nails and slowly go down the wire with a little pressure. If you feel it catch between your fingernails and collapse, do it again. You will see all that is holding it together is the insulation. Cut the wire there and fix it. You choice, barrel connector or solder and heat shrink. I have fixed a many a chronic check engine light issue this way.