My alternator was hit so i switched it out, my new one is nice, but now I see traction control light.

Any help?

 

That light will come on for a myriad of problems. You need to get the codes read, but you are in very common territory. Put alternator in the search box on this forum. There must be 20 if not more threads about the same thing you are seeing. Good luck.

 

When you changed your alternator, did your battery die? You mentioned it got hit, like collision? My first guess is battery is low, maybe drive it for a good while then reset your ecu.

 

Have you read this thread? https://www.clublexus.com/forums/is-...sc-lights.html

paul m.