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I don't have an answer for you, but I have a '94 GS300 and the trac light was coming on. I just got the 75K mile service done and they said the error code pointed to TPS and GPS (I think?). They changed both sensors. The light still comes on as follows: If I turn the key to accessories (where radio turns on) and wait a few seconds and then start the car, the TRAC light will stay on. If I turn the key all the way from off to start (without pausing at accessory position), the TRAC light does not come on. I am taking my car back today to have them look at it again. Please let me know if you get any new info also. Good luck.

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โˆ™ 2004-11-01 09:58:26
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Q: Why does the trac light come on when starting the engine on a Lexus GS 300?
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