Ok here is the deal.

I've got a auto 00 and just got a code pulled 0430. Great another fried oxygen sensor. I just had 0420 and paid over $200 to have that fixed. I have a WS y pipe and I am guessing this is the reason. Anyone else blowing 02's regularly with their y's. I think im gonna trash this ws y pipe. Fitment was good and gain were also good but i cant fix 02's every 3 months. Comments or help please.

 

i havent had a problem, but ive only had the pipe on for a week.
why did you pay $200???
you can get the sensor for under $50 and replace it yourself!!!

 

and if you do it yourself you can send me the extra $150 for the advice :-)

 

Might not be the Ypipe, can easily be a bad cat fouling up your O2 sensors.

Dixit

 

Well I spent $200 bc i dont have a tool to reflash the ecu. I was told that simply disconneting the battery wouldnt work.

Dixit- how do i know if a bad cat is fouling these 02's?

Thanks

 

it's most likely the cat.. i had mine replaced at Regal Nissan off GA400. They did it for free under warranty. 80k warranty i believe.

The only bad part is they didnt have a cat in stock so i had to wait like 5 weeks for it. After i replaced the cat.. no more SES...

 

Hmm, do you think that they'd replace the 02 and the cat under warranty. Do you have an aftermarket y pipe.

 

These codes mean the cat efficiency is not good. The second ego's in the bank are monitors (After the cat). They keep an eye on the efficiency of the cat and flag a code when it falls below a set threshold. Time for a new cat! I would say. Warranty is normally 8 years 80 thou miles but check with your dealer. the rules of emmission warrantys changed in the mid 90's. Sorry for bringing the bad news but I replace so many due to those codes. I due driveability work for a local lincoln mercury dealership.

 

Do you know the technician? If so you might be in luck. As for me If It was a friend of mine or a close friend’s friend I would but for the most part I don't think so! If I was you I would feel out the dealer! Check to see if they sell aftermarket parts! See if they are a friend or foe to the performance driver! If they support aftermarket parts you maybe in good shape. See if you can get an inside connection. Something! By all rights you have removed a portion of the emission system. In there eyes this may put a greater load on what is still there causing it to fail sooner. I would talk to them first before taking the car in!!!!! If you take the car in and they see it modified they may make a note with Nissan (They keep track of cars by VIN’s). This is all just my personal opinion. Take the parts you want and disregard the rest. Hope it helps. Revtech/Ron WWW.1Badtruck.com

 

As far as i know there are no 02's after the cat. 2 in the manifolds, and 2 in the y pipe. This is a 00 we are dealing with. Keep the help coming, thanks.

 

code p0420 and maybe even p0430 is most likely not a bad o2 sensor, but just that you need to get the o2 sensor recalibrated. there's a tsb on the o2 sensor so ask for it. it will most likely fix your problem. its a common problem with the 00's that the cade 0420 comes up. Look in the tsb page and bring it to your dealer, its covered under 80k! maybe you can get a refund...

 

Just take off the Ypipe, take it in to a different dealer, and have them replace the cat under warranty......

 

Straight pipe, $30-100, 1-3hp gain.
Rear oxygen sensor, > $30-100, ZERO hp gain.

Straight pipe 1,
Emissions equipment, 0

TK