1998 O2 sensor

[David Cooley]

At 01:44 PM 6/28/2000, lpwcruzr wrote:

> >     If utilizing the 98 PCM OBD2 config , you'll need to utilize the Pre -
> > Post Ho2s on each side
> > of the engine since the PCM is calculating Bank to Bank Fuel Trim based on
> > all 4 sensors.
> >   Len
>
>
>Can someone tell me if the after cat O2 sensors are used for any actual
>engine calibrations or not on the 96-00 engines. Or do the after cat sensors
>just throw a trouble code if there is something out of whack with the
>catalytic converter?


Paul,
They are only used for testing of the cats.  To force a cat test, you need 
to accelerate moderately from 30 to 60 then coast with the foot off the 
brake and off the gas, no downshifting, until you reach 30MPH.
http://www.obd2.com/ lists the different drive cycle tests.


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David Cooley N5XMT Internet: N5XMT at bellsouth.net
Packet: N5XMT at KQ4LO.#INT.NC.USA.NA T.A.P.R. Member #7068
I am Pentium of Borg... Division is Futile!
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