From: Jeff Strickland on

"jim" <"sjedgingN0Sp"@m(a)mwt,net> wrote in message
news:9tqdnSdsatigMHPWnZ2dnUVZ_v6dnZ2d(a)bright.net...
>
>
> Jeff Strickland wrote:
>
>> Bottom line is,
>> you either have a bad CAT or a bad sensor.
>
> Not necessarily. Exhaust leaks and corroded electrical connection are
> also possible causes of P0420 DTC.
>


Yeah, sure. Out here in California, we don't have much trouble with stuff
corroding, but we all know it happens.

Seems to me that one would hear an exhaust leak large enough to cause a code
that says the CAT was bad.





From: jim on


Jeff Strickland wrote:

> "jim" <"sjedgingN0Sp"@m(a)mwt,net> wrote in message
> news:9tqdnSdsatigMHPWnZ2dnUVZ_v6dnZ2d(a)bright.net...
> >
> >
> > Jeff Strickland wrote:
> >
> >> Bottom line is,
> >> you either have a bad CAT or a bad sensor.
> >
> > Not necessarily. Exhaust leaks and corroded electrical connection are
> > also possible causes of P0420 DTC.
> >
>
> Yeah, sure. Out here in California, we don't have much trouble with stuff
> corroding, but we all know it happens.

Maybe he's not in Cal.



>
>
> Seems to me that one would hear an exhaust leak large enough to cause a code
> that says the CAT was bad.

I have no way of knowing if he hears an exhaust leak or not. A small leak in the
right location would be enough.

-jim