I have a 2011 mustang with a TCM problem. Recently, the traction control has been acting odd. Sometimes it will work (when it feels like it) and sometimes the TC warning light will come on saying TC is disabled. If I turn the car off and restart the engine when this happens, it will usually start working again. It seems completely random as to when I can turn it on. However I can always turn it off if it’s on to begin with.
However yesterday I was driving with traction control ON and when on the highway, it randomly turned off and the TC warning light came on. This caused the engine to stall and the vehicle to not accelerate (it was as though the car was in neutral when this happened. The engine would revv but there was no power to the wheels and the car was freely rolling.) This was extremely dangerous as there were people behind me and it nearly caused an accident. Fortunately I was able to get over to the side of the road using the little momentum I already had, despite having no power to the wheels.
I was aware the traction control was finnicky but I had no idea that if it did happen to be working and it was ON and then if it turned off WHILE driving that it would cause the engine to stall. This is extremely dangerous and common sense would not suggest this at all. Is this normal?
My main question is: In the meantime can I just make sure traction control is turned off everytime I get in my car until I get it fixed? Logically speaking, it seems it only stalls when it’s on and then the TCM light comes on and turns it off. If I already made sure it was off when I first start the car before driving, then I should be ok to drive it until I can get it fixed? Based on the issue, it seems unlikely that the car would randomly turn it ON if I had it off to begin with, it only seems to either not work sometimes when I first turn the car on OR randomly disable it and turn it off when I have it on but not the other way around