iluv83vettes
NAXJA Forum User
- Location
- Houston
Finally fixed my p1391 code. Turns out the FSM is the only thing that calls the ring under the distributor the camshaft positioning sensor. That's why all of the parts houses around here "don't even list a camshaft positioning sensor." The Napa part is part number MP847 for those looking for the same thing. My old one had worn through the insulation and that is what was causing the short and sending the code.