Check Engine, VSC Off, VSC Trac lights all lit up - 2002 4Runner 3.4

Recently all 3 lights came on and stayed on. The truck has 38,000 miles.
I did a search on the net and all I'm finding is it could be the O2 sensor,
a loose gas cap (checked and OK), or a cat converter.
Has anyone had any experience with this situation?

Thanks

The problem that triggered both the check engine and the VSC OFF/VSC Trac
lights results in trouble codes (DTC) being stored in the ecu. To identify
the source of the problem you need to have the VSC/TRAC trouble code AND the
engine trouble code read. This can be done by a dealer with a hand-held
tester or with any OBDII scan tool. The codes read from the ecu will
identify the trouble area(s) that need to be checked.

"Frank" <Imhere@mypc.dot> wrote in message
news:ONy%e.3418$794.1665@trndny01...[color=blue]
> Recently all 3 lights came on and stayed on. The truck has 38,000 miles.
> I did a search on the net and all I'm finding is it could be the O2
> sensor,
> a loose gas cap (checked and OK), or a cat converter.
> Has anyone had any experience with this situation?
>
> Thanks
>
>
>
>
>[/color]

I just had the same thing happen.

A few weeks ago I was towing a small trailer and those same indicator
lights came on. I figured the trailer wiring caused some type of short or
malfunction. I disconnected the battery and reset the computer. The lights
went out.

It was fine until two days ago when they came on as I was driving. I did
not reset the computer hoping to find some way to read the codes.

Is there a way to read engine codes without a code reader?

BTW I can see the O2 sensor, etc causing the "Check Engine" light to come
on but what would they have to do with the Vehicle Skid Control lights?