For no apparent reason my VSC lights come on. I took it to one repair shop and they said my catalitic convertoer need to be replaced??? I took it to a dealer they said it was a faulty gas cap. I replaced they cap, but this did not fix the problem. If I turn the car off and start it again the lights …

On some cars, the Vehicle Stability Control warning light will come on along with the Check Engine Light (CEL)–for reasons that escape me. The need to replace a catalytic converter and/or having a faulty gas cap are both situations that would trigger a CEL (and possibly a VSC warning light), but i…

The CEL does come on. I had the car tested and the scan code was P0420. sys eff below threshold (bank 1). .5 needs SOP CAT That is what the Toyota dealer gave me. So, I took it to a Lexus dealer and they said it was only a gas cap. Natually I replaced the cap as opposed the converter.It still com…

Well, as I said, on many cars an illuminated CEL will also trigger the VSC warning light. Have the repairs done that are indicated by the stored trouble codes (in this case, possibly replacing the Cat) and the VSC light should go off. Incidentally, if your state has an emissions test as part of th…

Maybe yes, maybe no. Instead of the dealership, take the car to an auto parts retailer such as Auto Zone, Advance Auto, O’Reilly Auto, Napa, etc. Many of them will do the scan without charge. Get the code(s) and then come back here to report yor findings.

OK: This time when the VSC lights came on the Check engine light came on also. And now stays on even when I restart the car. I went to NAPA used their scanner (for free) Thanks; and got the Code PO420. The same code I got before Lexus changed out the gas cap. The gas cap “fix” worked for 6 months???…

I have had a problem with my VSC lights coming on ever since I purchased my 1999 ES300 new. While it was still under warranty, I took it to the dealer on 4 separate occassions. At that time both the VSC and VSC OFF lights were coming on. The CEL light never came on. The lights would always turn o…

VSC light 1999 Lexus es300

Maintenance/Repairs

douglas1954 February 23, 2009, 12:51am 5

When the VSC lights come on, it does not trigger the CEL. I know the CEL works only because it comes on prior to starting. If I take my car back to the dealer without the CEL light on and have it scanned, will they get an error code?

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