"wp51dos" <wp51dos@yahoo.com> wrote in news:1163421526.052662.105340
@h54g2000cwb.googlegroups.com:

>
> I get PO135 error code after service engine light came on.


That's P-ZERO, not P-oh. (P0135).


>
>
> Firestone says one of O2 sensors bad. Replace both.



It's the sensor between the manifold and the cat (primary sensor). The
heater vircuit is bad.

You do *NOT* NEED TO REPLACE BOTH. Don't go to Firestone.

However...Correct procedure here is to clear the code and see if it
comes back. You might get lucky and it will stay away. If it comes back,
then replace the sensor.



>
> car is 98 dx Civic with 57,000 miles.
>
> Is that covered by emmissions dealer guarantee ?
>
>


Not likely. Oxygen sensors are only covered under a three year or five
year warranty. Call your dealer to be sure.



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TeGGeR®

The Unofficial Honda/Acura FAQ
www.tegger.com/hondafaq/