Traction control going off erroneously

Yes you need to check the line of sight for each of your hub sensors and see if any trash has gotten in there with the backing plate or whatever got rusted up and slapped around that could have damaged the tone ring on that wheel You need to have a look at that anything obstructing the tone ring from the sensor is a no-no can cause just the kind of problems I think you're having mismatch tires will do the same thing I imagine if you got two different brands of tires in the same size they could be off enough to make this problem rear it's ugly head if you're not careful.

 

First thing I would do is watch live data (graphs would help) on the 4 wheel speed sensors to see if you can tell which one is causing the issue. I use Car Scanner by Stanislav Svistunov on my iPhone and a cheap $12 OBD2 bluetooth dongle, but there are other options.

 

In Techstream, or a comparably-complete scan tool, pull up the "ABS History" display. This will show the most recent four times ABS or VSC got triggered, with the speeds of all four wheels, steering angle, yaw, and lateral and longitudinal g forces at the time of triggering.

To you, there is no reason for VSC to engage, but it clearly is seeing a reason. The history display should suggest what its reason was, and then if you see that one of those inputs didn't match reality, you know that's what needs to be fixed.