TCS/Stabilitrac activating unnecessarily
I'm looking for some ideas on why this is happening, as my shop seems to be stumped.
2017 Premiere. It was in an accident last fall, and after waiting a *long* time for parts (LF wheel assembly) I got it back in March. Recently the TCS has been activating for brief periods when it shouldn't. It did it rarely a few months ago, but in the last few days, it's become quite common. On a 50 mile trip from home to the airport, there were 11 incidents. Each incident is from 1-5 closely spacex events where the TCS light on the dash flashes, and a varying amount of deceleration is applied to the car. Sometimes the effect is mild, and sometimes it's as strong as using the paddle on the wheel. It has a high frequency pulsing component, much like when ABS is engaged.
Conditions were dry. Speeds were anywhere from 55-70 mph. Most times, the car was maintaining speed, once it was under acceleration (a transition ramp from one freeway to another). Gradient was from flat to 5% downhill.
In *all* cases the car was on a sweeping right turn. Fairly significant lateral acceleration, but not enough to induce body roll.
Neither the shop nor I have found any OBDII codes to indicate a system malfunction.
I don't have a good sense for how the TCS wheel spin detection happens on this (or any other) car. I'm interested in suggestions.