Or perhaps the alogorithm detects some kind of trouble and shuts down things to allow the system to go safely in limp mode to let you get to a safe place in a safe manner instead of just shutting down on highway posted at 70MPH, or letting you continue on with lights blinking until engine is destroyed . The sgutting down thing (been there a few times in the past) is always interestingSo, the check engine light comes up and the computer chip algorithm decides it has to shut down Stabilitrak and reduce engine function causing rough idle causing unsafe speeds if you are on a road with posted speeds of 70 mph? Sounds like a risky way to call attention to possible problems!!! This has occurred on relatively new cars and trucks with varying responses by GM and it's dealers, some even saying that a new car with 10,000 miles on it has carboned up the throttle body and it isn't covered under warranty. I have been doing research because my V6 terrain with 60.000 miles has started this nonsense! Mechanic (trusted) says the throttle body is in bad shape so we are replacing it (after 60,000 miles? This is GM tough!?). Everybody has quality issues anymore but GM has had at least 6-7 years to figure this out, give me a break!
Hello did you figure this out after all? There is a TSB for this. Inspect and clean your hub assemblies as these conditions may be caused by single or multiple pieces of ferrous metallic debris stuck to the wheel speed sensor magnetic encoder ring.. With a decent scan tool you can read the c codes instead of the p codes to know which hub assembly is the culprit, otherwise you would have to take off all tires and inspect each one front and back. Removal of the hub assembly may be necessary. Replacement may not be required. Hope this helps!This morning after starting my 2010 Terrain I noticed it was idling very rough.
Then the check engine light came on and there was a display that send "Service Stabilitrak"
I backed out of the garage and put the car in park.
I turned off the stabilitrak but the message and rough idle continued.
I then shutoff the engine and then restarted it.
I turned the stabilitrak back on and everything was fine.
I've driven it several times today w/o any further issues.
I have a 2010, 4 cyl. with 8850 miles.
Anyone have any insight?
My son brought over his code reader on 03/18/12 and guess what?
There was no diagnostic code stored.
Guess it was just a strange anomaly.