Intermittent no-start and shifting issues

[captainjmh]

Okay so long story short. I'm lost the dealership is lost so here it is. This is a random occurrence. Drive vehicle runs like a top, park turn off no issues. Go eat come back try to start, and that's where it goes bad. Get shift to park message, service stabilitrak, service 4 when drive and it will not start. Turn off power driving lights stay on light on push button on few minutes later everything turns back on with same messages with check engine light on. Only way to get it to start is get shifter into neutral. Once it starts downshifts like crap until you reset the TCM . Once you go thru that drives great no messages and check engine light goes away. Been at deal for 3 days they have no clue.

 

[Fless]

We would like to know what you're working on -- year, make, model, engine, etc. Consider putting it in your signature so it's always there for reference.

 

[Joseph Garcia]

^^^^^x2^^^^^ It is challenging to assist you, if we don't know what you are driving.

 

[captainjmh]

Sorry folks forgot that part. I updated

 

[Fless]

It sounds like there might be a communication issue with the transmission, thinking it's not in park, then shifting weird.

 

[captainjmh]

It happens so randomly it's hard to figure out. The dealer had it and it wouldn't do for them they basically said sorry take video of the display showing the messages. Bring it back. I even suggested if it does it that I do nothing but put it on a flat bed and take straight to them.

 

[Fless]

When the messages are on the cluster, use a good scanner and get the codes that are triggering them.

 

[captainjmh]

I'll have to keep one in the vehicle. Most of the time once it stops freaking out and I get it start I'll get home and the cel has turned off and I can't get any stored codes. I was hoping that the dealership with their fancy equipment would find something stored to point them in the right direction.

 

[captainjmh]

The cel turns off once it's running normal, but I was able to get 1 code U1267.

 

[Doubeleive]

the dealer is correct, it will have to be looked at when the problem is happening.
Intermittent problems suck
all you can do is look for TSB's for the common places that wire rubbing or exposure can occur and see if you can find anything
IF you carry around a half way decent scanner, then when it occurs out in the wild capture the codes and that might lead you somewhere, the problem is if the problem goes away it doesn't save it. Sometimes it might just depends, a bad handshake between modules might not be saved upon restart.

 

[fozzi58]

5 bucks says its your ground wires.