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Old 09-08-2005, 12:17 PM   #1
02darkRS
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02-7 MBP RS/i hybrid
now w/ AVLS!

Angry Pc420

yes, i am ....... i see the CEL thread now & pc420??? dumbass.

the autozone printout seems to be short some ink on the 0.

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Last edited by 02darkRS; 09-08-2005 at 12:42 PM.
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Old 09-08-2005, 07:27 PM   #2
Tim Sanderson
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Could that be p0420- cat inefficiency?

How many miles on the car? What kind if any mods?
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Old 09-09-2005, 11:04 AM   #3
02darkRS
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Default Po420

Yes it was PO420, i found the CEL thread. I posted because my search for PC420 obviously turned up nada.... so i see now that most with just this code & no others had the cat replaced. When i called the dealer he tried to tell me that it was the O2 sensor but i see since i have no other codes he's likely wrong. Am i reading this right?



68,000 - no mods... which is why i am perplexed.
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Old 09-09-2005, 12:59 PM   #4
russd32
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Yeah, I have the same deal 02 with no mods, 67k miles with the same code. I got it once and had it cleared. Then I got it again so I had it cleared. I just changed my plugs and filters so we'll see if it comes back. If it does I'll just take it to the dealer and have them check it out. It's probably the rear O2
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Old 09-09-2005, 01:13 PM   #5
02darkRS
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when i purchased the car it was cheap on a Nissan lot....found the spark plugs to be rusty & misfiring so they replaced them. It's possible that they used the bosch ones or something else this car doesn't like so i will be checking that too....

as far as the rear sensor goes... i read about 8 pages of the CEL thread yesterday & it seems the code PO420 showing alone is indeed a cat problem. If it were the 02 sensor you'd get other codes with it. Two people in that thread had the cats replaced by the dealer when only the PO420 was thrown.
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Old 09-09-2005, 07:18 PM   #6
Tim Sanderson
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Quote:
Originally Posted by 02darkRS
when i purchased the car it was cheap on a Nissan lot....found the spark plugs to be rusty & misfiring so they replaced them. It's possible that they used the bosch ones or something else this car doesn't like so i will be checking that too....

as far as the rear sensor goes... i read about 8 pages of the CEL thread yesterday & it seems the code PO420 showing alone is indeed a cat problem. If it were the 02 sensor you'd get other codes with it. Two people in that thread had the cats replaced by the dealer when only the PO420 was thrown.
I think I was one of them. HAve it checked out and don't let them sell you jack squat. It should be warrantied because it's emissions related. Theres info about your states emissions related mandatory warranty crud in your owners manual.
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Old 09-10-2005, 08:40 AM   #7
Mulder
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The federal emissions warranty is 8/80 and covers the catalytic converter and ECU. On a non-modded car that has the P0420 code the converter should be replaced under this warranty.
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Old 09-10-2005, 12:21 PM   #8
kamil212
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Quote:
Originally Posted by Mulder
The federal emissions warranty is 8/80 and covers the catalytic converter and ECU. On a non-modded car that has the P0420 code the converter should be replaced under this warranty.
Well, I guess I'm out of luck. (mods) I got the CEL twice already and cleared it. It's running fine. It seems to be throwing the CEL only on long distance trips (+400 miles). I got the borla headers, stromung cat-back and cobb cai. I'm guessing the dealer will not take care of the cat or the ecu then. I was looking into a high flow but I really don't like to make my car any louder. How do resanators work? Do they clog up the exhaust? Where (on the pipe) and how are they instelled?
Also any recommendations on making the backfiring less occuring (except going back to stock) ( do spark plugs have anything to do with it? )
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Old 09-10-2005, 01:40 PM   #9
ShawnRS
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02darkrs: You should be covered under warrenty, AS already said.

kamil212: I drive an 02rs. In my experience I ended up having to return to the stock y-pipe and new cats (off an 04,had to shorten catback). The PO 420 started with my TWE headers but I continues to a full exhaust. TWE headers --> High flow car (2.5")---> Cat back (no res)--> Borla free flow muffler = way too freaking loud inside the car.
Added res (2x) at different times. Felt each one, as it lost umph.

As for back fire. Subaru's run rich and is of a Hozt.layout . MAYBE, in the future some programer will be able to reduce the richness safely.

Shawnrs
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