2012 TAHOE HYBRID CODES P0AC4, U186A, U186B

[Tahoeman12]

I'm in possession of the truck and it's driving great and it's not gone into limp mode yet..... they did clear all the codes so hopefully that will make a difference. If the problem persists then I will try to find another shop that has the software to dig deeper into my issues. What I'll do next time is once it goes into limp mode instead of disconnecting the battery to get it to drive again, I'll leave it as is and have it towed to the shop. Thanks for all the information so far, really appreciate the feedback.

 

[j91z28d1]

I'm in possession of the truck and it's driving great and it's not gone into limp mode yet..... they did clear all the codes so hopefully that will make a difference. If the problem persists then I will try to find another shop that has the software to dig deeper into my issues. What I'll do next time is once it goes into limp mode instead of disconnecting the battery to get it to drive again, I'll leave it as is and have it towed to the shop. Thanks for all the information so far, really appreciate the feedback.

any luck?

 

[Prae71]

I'm in possession of the truck and it's driving great and it's not gone into limp mode yet..... they did clear all the codes so hopefully that will make a difference. If the problem persists then I will try to find another shop that has the software to dig deeper into my issues. What I'll do next time is once it goes into limp mode instead of disconnecting the battery to get it to drive again, I'll leave it as is and have it towed to the shop. Thanks for all the information so far, really appreciate the feedback.

I believe I had a similar issue with my Yukon. The wife had a small fender bender, she got hit in the rear driver tire, which knocked a communication wire out of place under the driver side passenger door. I fought this for a few weeks and then took it to the dealer which couldn't replicate the symptoms. As I left the dealership, all the lights popped on and went into limp mode. I took it to a different dealership who actually took the time to diagnose it. It was in their possession for 5 months. After warranties on 3 different modules and no luck fixing it. The technician opened the rear passenger door while looking at the modules and *BAM* everything triggered again. It wound up being 2 wires on the main can bus that were wore into about the size of my pinky nail. That fixed it and I've never had that issue again in the 6 years since. Not a fun time, but sounds like you need to chase wires and not worry about the modules quite yet.