J-'s writeup and train of thought is pretty good at tracking the problem of poor quality control in non-oem Optis. There is no code for "You just installed a crappy aftermarket Opti with all-too-common misaligned optical reader".
If you never had one of the codes related to the CPS BEFORE
you did an Opti r&r, then there is a definite logic flow that the CPS is not the cause of the code. It's likely whatever OTHER
components communicate with it that is the root cause. The issues J- outlines have taken a while to accumulate based on the combined impact of guys ending up replacing their 20-year old distributors and the discontinuation of AC originals (with their associated quality control).
Too many of the aftermarkets are winding up with lo quality and poor assembly so that the only indication you have of problem is that trace code. I currently have a similar P0336 which came with the car from the seller who stated he had just paid $1,100 to have "a genuine dealer Opti" installed. The car runs great, but even AFTER I replaced the CPS ($50) the code remains. For reference, this supposed "genuine dealer AC Opti" has a black back (not yellow as an AC does), so the poor seller got reamed and I'm running a piece of junk Opti until digging in and swapping it out with a real AC oem I have from my old FWB along with new cap and rotor. I have to get at it because the car is due for inspection nect month and they won't give me another waiver.
So there. The only reason throwing so much detail is the thread title is perfect for future (probably definitely increasing) searches.
And of course what 1slow- added for another permutation on the same theme. For reference my wires leading away from the CPS rearward toward the starter are stiff and brittle like a boxed noodle. I bought the new plug/pigtail but it's only 3" long.
\'96SS SOB: SSRI, Herter Tune, Tri-Y II, SLP SS, 3000 Edge, F/HO bars, METCO extendeds and CV MMC, Bilsteins, currently Vredestein Ultrac Sessanta (315/35 rear)
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Last edited by 96 Black; 06-18-2017 at 01:11 PM.