No idea on what the issue is, but some simple things that usually disable traction control are:
- Engage the parking brake just one or two clicks
- Pull the fuse to which ever systems runs traction control, usually the ABS system
- Pull the ABS sensors off at the brakes (you need to cover the exposed connections and secure the loose connector. Could do this one wheel at a time to see if one of them is the cause.
The CEL is on, so the computer has some idea of what's up, you should read that.
I had a GM with crappy ABS sensors and it would trigger traction control. I ended up pulling the ABS fuse, damn thing would engage one wheel at the worse times and that made for some scary stopping. Some times this was triggered by debris on the wheel speed sensors. I ended up trading it in, was done dealing with the nonsense and it was developing over issues too.