VSC Trac Check Engine Light

2002 SR5, 245k, unmolested grocery getter. Maintained at the same two shops religiously, no accidents or major work, just maintenance. Runs like a watch.

I was going over Monarch Pass in Colorado using the tranny as a break assist and to drop gearing down for passing. We use 4x4 at various times throughout the year. No issues with tranny or transfer case.

The VSC, Trac and CEL light came on. No issues with drive ability but can’t turn them off.

Thoughts on where to start to troubleshoot?
Thanks,
Griff

 

Run the codes. Until you get the codes, no one can help you.

The other lights will come one for any time the CEL lights up.

I for one would baby the transmission. They are the only somewhat weak part of these rigs.