Code p0785
Another shop told me that these C5's have so many issues that are related to a bad ignition switch. I told my tech Tommy, and he said that he was researching that. I pulled the old ignition switch, and the most of the contacts were toast. Looks like a bunch of sets of points.
Anyway, replaced it with a new OEM switch, and the same issues happened, albeit much more often now (probably a coincidence).
I drove it 50 feet and check engine came on with P0785. The car is still pretty cold. I cleared the code and it immediately came back without driving, just idling. We went through this nonsense about 7 times. I went to turn around to drive it back into my driveway, and the check engine light stayed off. I drove it for a while and it performed as normal without any check engine light. I'm now wondering if the problem is just when the transmission is cold. Each time I have an issue, it goes away after I clear the codes several times while it warms up.
Oh well... I have a new ignition switch, 1-2. 2-3, and 3-2 solenoid (twice), new transmission oil and I'm out $600 bucks and still have the issue.
What to do next?? I have no other codes








