Honda Car Forum

sounded like rocks loose in catalytic converter on 99 honda accord,
4-cyl, 4-door dx 5 spd.

replaced cat with aftermarket can. no more loose rocks.

problem solved.

uhh...no.

a few days later, got a "check engine" light. error light flash code 67
(P0401): "catalytic converter efficiency low." checked the cat's O2
sensor. heater resistance was too high.

replaced the sensor.

problem solved.

uhh...no.

a month later the "check engine light" and error 67 are back.

what's my next move?

On 19 Jul 2006 01:37:37 -0700, "honda_part_jockey"
<stmashaw@gmail.com> wrote:

>sounded like rocks loose in catalytic converter on 99 honda accord,
>4-cyl, 4-door dx 5 spd.
>
>replaced cat with aftermarket can. no more loose rocks.
>
>problem solved.
>
>uhh...no.
>
>a few days later, got a "check engine" light. error light flash code 67
>(P0401): "catalytic converter efficiency low." checked the cat's O2
>sensor. heater resistance was too high.
>
>replaced the sensor.
>
>problem solved.
>
>uhh...no.
>
>a month later the "check engine light" and error 67 are back.
>
>what's my next move?



A P0401 is a code for a restricted egr flow. A p0420 is for the
CAT. figure out what code you really have and get back to us

my mistake. the light-flash code was 67, which according to the haynes
manual is P0420. i wrote the wrong one.


chip wrote:
> On 19 Jul 2006 01:37:37 -0700, "honda_part_jockey"
> <stmashaw@gmail.com> wrote:
>
> >sounded like rocks loose in catalytic converter on 99 honda accord,
> >4-cyl, 4-door dx 5 spd.
> >
> >replaced cat with aftermarket can. no more loose rocks.
> >
> >problem solved.
> >
> >uhh...no.
> >
> >a few days later, got a "check engine" light. error light flash code 67
> >(P0401): "catalytic converter efficiency low." checked the cat's O2
> >sensor. heater resistance was too high.
> >
> >replaced the sensor.
> >
> >problem solved.
> >
> >uhh...no.
> >
> >a month later the "check engine light" and error 67 are back.
> >
> >what's my next move?
>
>
>
> A P0401 is a code for a restricted egr flow. A p0420 is for the
> CAT. figure out what code you really have and get back to us