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[Terry]

I have a 1998 Chevy Venture van. The check engine light has been on for
about two months. I took it to Auto Zone to get an engine diagnostic
reading and the result was a code PO420. Seems to be either the O2 sensors
(it has two) or the catalytic converter. I took the one sensor out and
checked it with a multimeter and propane torch, it seems to be good. I
can't get to the other sensor to check it. I connected a vacuum meter and
got a 19 at idle and 21 at around 1800 rpm. The van runs sluggish, but it
will run 80 miles per hour. So, my questions:

A: Is it likely to be one of the oxygen sensors?

B: Or a "poisoned" converter. (no additives have ever been used in the
fuel)

C: Stopped up converter.

D: If it is the converter, what is a rough estimate to replace it in the
southeast. (Tennessee)

Thanks, Terry

[Woody]

Have it analyzed with an OBDII tester. The O2 sensors can be checked.
Running long periods with a bad O2 sensor or rich condition will damage the
converter....


"Terry" <nospam@myisp.com> wrote in message
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