SOURCE: How do I reset the VSC trac warning light on my
see my RX and GX posts earlier today for same symptom
SOURCE: when starting my lexus GX 470 the vsc off light
The VSC on TRAC off lights will come on when there is an air fuel related issue.
If you have recently filled your tank, unscrew and tighten the gas cap till it clicks. The lights may need to be reset if they stay on after that. They will also be triggered by a fouled O2 sensor ins the engine or exhaust as well as a sticky throttle valve.
If a dealership resets the lights they can attach a code reader under dash to determine the cause in about 5 minutes.
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