While on my way back to school, the damn P0420 code popped up and I went and got it scanned and you guys know what it is...so my question is that I was going to get a 02 simulator to kill the code, my question is do I need a dual output or single output? I have aftermarket headers and ypipe and I have a Fed spec.

 

anyone??

 

I'd try the spark plug non-fouler first.

 

since you have the fed spec you gonna need the single output. i have a cali and i have the dual output.

 

^^ +1

 

i think im going to do the non-fouler my boy has one..

 

I tryed the non fouler and it didn"t work.Same code came up,Cal emmissions

 

i cleared the code but the damn thing came right back after coming back from the track yesterday..I know that I need a single output and now i just have to dig up the directions for installation.

 

i think that code means your car is high

 

You'll need a single output O2 sim.

 

alright and the direction on how to wire is up here somewhere?

 

http://forums.maxima.org/5th-generat...tallation.html

So i can basically use this guide but only sim the sensor that I need? which wire is which for the P0420?

 

I had the p0420 and I resolved by puting in a high efffiency air filter K/N. It's been 6 month now and no codes.

 

no comment just....

 

remember if sensor is bad o2 sims wont do nothing. sensor has to be working good.

 

how do i determine if the 02 sensor is working good? the code really didnt come about until i put the headers and ypipe on. I also added a resonated test pipe so I dont know if that had any effect on it.

 

OHHH there's my answer to my problem.

Thanks man, I owe you internet props cuz I'm having constant P0140/P0160 with a sim & headers on my AE.


/threadjack

 

Resonated test pipe has no effect.

If you got the code when you put your headers/pipe on then the P0420 is not from a bad sensor. Plus if I remember correctly that's a primary O2 sensor so if that goes bad your car may run poorly. Single output O2 sim is like $20 so it's worth a shot.

 

What is a high efficiency air filter K/N?
How would any type of air filter cure bad catalyst?

 

lmao not a problem dude..

you have to unpluged it and test the resistants on the sensor..

 

P0420 is a bad bank 1 precat. It isn't the primary O2 sensor but the bank 1 rear that picks it up.