Nissan Xterra P0430

[Wyley87]

Ok so I've had this issue for about 2 years. Oem cat broke apart and was replaced at a shop. Was fine for almost a year then the code popped up again. Which was replaced again under Warrenty.

Last year when it was time for inspection I was able to clear the code and drive around in 2nd gear till the readiness monitors cleared and passed.

Truck has 146,000 miles on it.

Here is a vid I took of my solus scanner.

[YT]KgH3MTXE93w[/YT]


Sent from Texas

 

[Wyley87]

Ok so I found an exhaust leak but it's after the cats and before the muffler. Also a missing nut on the front flange of the driver side cat. I can't feel a leak there e though.


Sent from Texas

 

[Zembonez]

We're here... just don't have a good answer for ya!

 

[Kennyray]

I did a little research. A lean or rich condition will damage a cat. But you didn't mention either one.

 

[Wyley87]

Well I'm not really sure which it is. I know the o2s will fluctuate back and forth between rich and lean.

I bought a new clamp for the post cat leak.

No worries Jim I figure it's the weekend and most are probably doing their own projects, partying, or just trying to enjoy their weekend.


Sent from Texas

 

[Draenor]

I cant see much on that vid. I do see about 2:05 on the bottom left was an O2 reading. It should fluctuate back and forth on the voltage. As for the times you are applying the accelerator, yes it will show rich as it is gonna add fuel.

Just because you have a leak in the exhaust does not mean you will feel the exhaust. It can also have a venturi effect, injecting extra oxygen into the exhaust giving a lean condition, in turn telling the ECU to add more fuel.

 

[Wyley87]

Sorry about the vid quality. I get those two leaks figured out and report back.


Sent from Texas

 

[Wyley87]

just got on the PC and yes the vid quality sucks.

From what i read about exhaust leaks is that if its after the cats it wont have any effect on codes or emissions.

 

[Wyley87]

Looks like I need a new cat converter.


Sent from Texas

 

[dirtyoldman]

Them things ain't cheap.