Re: P0420 code from check engine light 2000 Mazda Protege?
by "Chuck" <Chuckk2nospam@[EMAIL PROTECTED]
>
Jan 10, 2008 at 06:01 AM
It's also possible that the first O2 sensor is getting a bit long in the
tooth.
Usually, the front sensor fails before the rear one. On my Miata, the
front
sensor had a slightly lower output and had a bit slower response than a
good
sensor. This caused the 420 code to set periodically. A reset might be OK
for months, a week, or a day. I only spent about two years screwing around
with this and that before I broke down and replaced the sensor.
<me@[EMAIL PROTECTED]
> wrote in message
news:lgr7o3lucj8b6vk4j93oqv8v8vjqvfoegp@[EMAIL PROTECTED]
> Got this code and it says something abt catalytic
> converter system. God I hope not cause that's expensive
> to replace?
>
> Do cat system even wear out?
>
> Car has 140k on it and was bought new.
