"comcastss news groups" <pop@pplastic.com> wrote in
news:6aWdndqgSqSP52TYnZ2dnUVZ_oWdnZ2d@conversent.n et:

> I just stopped at auto zone to have my check engine light code read.
>
> He says its code 420



You mean P0420.



> and it looks like I need a new cat.
> He asked me if I drive the highway allot. Most of my travel is highway.
> I've never heard that highway driving is bad for the cat???
>
> Is he correct?
>
> I'm going to look up the 420 code online now...
>
> Oh yeh, 98 Accord coupe V6 auto 110,000 miles
>
>


Highway driving does not damage the cat.

There are several causes of the P0420 error. The most common, and most
likely in your case, is simply a failing cat. Some models (not yours) had
problems with poor connections at the igniter, which the ECM misrecognized
as a failing cat. An exhaust leak after the primary O2 sensor is another
possible cause, as is a cracked exhaust manifold.

Honda has a TSB for your car for this specific problem (03-073). The
speicifed cure is cat replacement.


--
Tegger

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