2002 Pathfinder DTC P0430 Code

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rj - 16 Aug 2008 04:20 GMT

My 02 Pathfinder started generating a P0430 code while I was driving on a
250 mile trip (naturally). The code description is "catalyst efficiency
below normal - bank 2." I changed the spark plugs and the car passed
inspection just 2 weeks ago. Is it likely that a tank of below par gas
that I bought on the trip could be the cause of the malfunction? There
don't seem to be any obvious dents/leaks in the exhaust system and the car
seems to be getting above average gas mileage (22 miles per gallon
highway).

Thanks in advance.

RJ

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rj - 16 Aug 2008 18:25 GMT

> My 02 Pathfinder started generating a P0430 code while I was driving
> on a 250 mile trip (naturally). The code description is "catalyst
[quoted text clipped - 8 lines]
>
> RJ

Here's an update. Just rechecked the car and found that the left side
3 way catalytic converter (which has the bank 2 O2 sensor in its front
tube) is leaking at the top. So that's what triggered the code P0430.

Since I have to replace this converter (& it's out of warranty because
the car has 90K miles), has anyway had any success/trouble with
aftermarket converters? The best Nissan OEM price I could find was $625
while a direct fit aftermarket one from Eastern costs only $212.

Thanks.
RJ

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Dustin - 17 Aug 2008 01:26 GMT

>> My 02 Pathfinder started generating a P0430 code while I was driving
>> on a 250 mile trip (naturally). The code description is "catalyst
[quoted text clipped - 20 lines]
> Thanks.
> RJ

The aftermarket converter will work fine.

Dustin

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al - 17 Aug 2008 03:00 GMT

> > My 02 Pathfinder started generating a P0430 code while I was driving
> > on a 250 mile trip (naturally). The code description is "catalyst
[quoted text clipped - 20 lines]
> Thanks.
> RJ

An aftermarket cat will be fine. They must meet federal standards to
be sold in the US so there's no chance of getting some cheap
knockoff. The biggest problem in replacing the cat will be undoing
the bolts. Guaranteed they're all seized and will have to be
hacksawed out. Always use liberal amounts of anti-seize compound on
every thread and flange during assembly. Good luck. Al

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e.meyer - 17 Aug 2008 21:49 GMT

> > > My 02 Pathfinder started generating a P0430 code while I was driving
> > > on a 250 mile trip (naturally). The code description is "catalyst
[quoted text clipped - 27 lines]
> hacksawed out. Always use liberal amounts of anti-seize compound on
> every thread and flange during assembly. Good luck. Al

There is a common problem of a leak in the front tube that Nissan has
a kit for $50 to fix. Make sure that's not really the problem before
springing for a new Cat.

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