new cat and 02 sensor; old error code

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honda_part_jockey - 19 Jul 2006 09:37 GMT

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?

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chip - 23 Jul 2006 02:32 GMT

>sounded like rocks loose in catalytic converter on 99 honda accord,
>4-cyl, 4-door dx 5 spd.
[quoted text clipped - 18 lines]
>
>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

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honda_part_jockey - 23 Jul 2006 04:24 GMT

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

> >sounded like rocks loose in catalytic converter on 99 honda accord,
> >4-cyl, 4-door dx 5 spd.
[quoted text clipped - 21 lines]
> 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

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