i have a 1992 ls400 with 135,650 on the clock, i recently was on the highway and the traction control light went on , along the the check engine light without me pressing the button, so i was driving still keeping my eye on it and then the check engine light turned off, (tcs was still off at this time) so then i came to a compete stop and the tcs engaged and was fully functional again i could now press the button and it would turn to the on off positions. i went to drive the car again after about 40 min and none of the lights were on then i came to a stop light and the both came on again, its apparent that the check engine light is coming on becuase of the tcs , i was thinking maybe its just a dirty sensor or somthing , can anybody help me out , i want to solve this problem myself i dont want to have to take it to a professional, im all about DIY when it comes to these sorts of things

thanks for your time and input

 

Well, firsthand, Id say check the OBDI for any stored/saved check engine codes...Then you can check which possible sensor/vacuum line is out of place or not functioning properly.

If not, then take it to AAMCO for a free computer diagnostic...

Goodluck