Had a "Solid Yellow Engine" CEL come on today. It threw two codes:
P2188 - Fuel too rich at idle
P2786 - Gear Shift Actuator Temperature Too High

The first is maybe MAF or O2 sensor or maybe associated with the Alta tune (stage 1). The second I have no clue. Do they mean anything when presented together?

No noticeable engine problems, though I didn't really push it when the CEL came on.

Pretty much planning on the dealership in the morning, but forewarning would be appreciated.

 

Any word on what it was??

 

Yes, figure out what it was?

 

Just saw your posts...
P2188 was a loose clamp on the downstream side of the MAF. Fixed in 2min. Got a tip on this from Chris @ Alta so I never took it to the dealer.

P2786 never recurred. I suspect it was a false code. Interesting thing about this one is that Chris seemed to think it had a different error code associated with it, but all my searches have only shown the above descriptor. Hmm.

 

I spoke too soon. The same P2188 CEL is back. I've been running the stock map for a week or so & it popped up again. I did see some older posts on this CEL with no resolution noted. Hopefully something will turn up that explains this one.

Let the troubleshooting begin.

 

Any more updates? The wife's car keeps throwing these two codes.....