That's a good point. I was under the impression that there were either no such codes for the FED specs or an exception of some sort, but even though the FSM lists the codes separately for the CALI and FED spec 2000s, I didn't see any significant differences in the diagnostic procedure when I skimmed through. I'll take a look more later when I get home to see if I find anything.

Just so you know, the FSM only lists the pre-cats (along with some other non-catalyst related parts) and not the main cat as a possible cause, even for the FED spec.

 

Headers will replace/remove all pre-cats on a CALI spec. I say just do it, its well worth the power.

 

ok i guess my problem will be solved with headers even if it only remove one pre cat the OBD2 scanners said something about Bank 2 so if i put headers that's the one being remove right.
Well thanks everyone for the help.

Now i have to worry about the money and which headers to get.
Do i need any o2 sims for the headers?

 

Yes. Unless you don't mind having a code or you want to extend and bung your secondary O2s.

 

Isn't there a cheaper solution to this which is getting Fed OEM Front manifold. This will eliminate the front pre-cat on cali Spec car?
Unless, of course, you spend on headers...

 

Or buying a used front pre-cat in the 5th Gen Classifieds, since people with headers practically give those away.

 

I meant to put Fed Spec mahifold to get rid of any pre-cats... unless you gut the front cat.

 

I have a VQ30

 

is that why you are so angry?

 

ok guys i think im going with the headers option, now i need to know which 02 sims i need and what headers.

 

the p-0430 is the bank 2 front pre cat so what are you talkin about when you say the 02 sensor just past the cat?????????

 

which headers are you getting i cant find a company that makes them for a 00-01..

 

cattman

 

There is an O2 sensor just past each pre-cat. See diagrams I posted.

 

Y'all really need to read around more.... Cattman and Hotshot headers work on 00-03s.

 

i thought that hotshot didnt do them anymore for the 2k/1

 

yea i was just on there website and the headers are for a 02-03

 

That didn't stop Sloppymax, upstatemax, BlackbirdVQ, and others putting em on their 00-01s...

 

is the insall a pain in the ****??
im assuming it is considerin the headers are a bish to get to.

 

Install isn't that bad if you have the right tools. Tilley, Cutler, and I did mine in less than 6 hours, which included doing my motor mounts, BS time, and lunch at Arby's. So I guess it could be done in about half that amount of time if I had to do it again.

 

so 02/03 hotshot header will fit a 00?
I was under the impression that they stopped making them for 00/01 and that does guys that have them were the lucky ones who bought them when they came out.
Anybody know what the deal with them ?

 

Only on CALI spec 00s, since they don't have an EGR bung.

IIRC, I don't think they were ever made for the 00-01, you just take the 02-03 Hotshots and make em fit.

Install write-up

http://doug.maxima.org/showthread.ph...hlight=headers

 

Nope, I'm angry because I hate stupid people that think they know more then they do.

 

So why are you so angry?

 

such as?????

 

I am getting confused here. So, Bank2 is Front exhaust tube assembly? and Bnak1 is the three way catalyst?

Please advise!!

Thanks.

 

Bank 2 is the exhaust piping near the radiator. Bank 1 is the piping near the firewall. Three-way catalyst is what the actual cats are/do. A three-way catalytic converter has three simultaneous tasks: 1.reduction of Nitrogen oxides to Nitrogen and Oxygen(2NOx → O2 + N2) 2.oxidation of Carbon Monoxide to Carbon Dioxide(2CO + O2 → 2CO2) 3.oxidation of unburnt non-Methane hydrocarbons (HC) to Carbon Dioxide and water(CxHy + nO2 → xCO2 + mH2O) More info: http://en.wikipedia.org/wiki/Catalytic_converter

 

How about the power gain with hotshot is it the same to cattman?

 

Thanks, Yayomax.

I have another quesiton, how does P0430 (bank2) is related to the 3 way cat? I remeber the posts in this thread mentioned about replace 3way cat and the bank2 O2 sensor.

Anyone ?

Thanks, again.

 

My car full surprises about 2 weeks ago i cleared the SES and now it came back but it only gave p0153 ...
p0430 didnt come back but can i trust that.?

 

Bank 2 is the location, 3 way cat is the type. It performs 3 functions at the same time, hence 3 way cat. the o2 sensor will have its own code. So in my opinion, replacing the sensor will not be necessary.

 

will your car be able to pass emissions?
how much/where did you get o2 simulators and how do you convert Cali Spec to Fed Spec?

 

Four weeks ago my 2K Maxima GLE with 32K threw a SES code P0420. Light stayed on for about two weeks and then went out. Took it to emissions last week and it passed to my surprise. SES light came back on couple of days later.

 

1. Yes, the car will pass emissions (OBD-II tests), assuming you install the sim correctly and don't just clear your codes immediately before testing.

2. www.o2sim.com

3. There is a good write-up in the How-Tos on the Cali -> Fed conversion. It was by Desert Pearl.

 

Puppetmaster, you seem to know your **** man so tell me if the 2k Cali-Spec front pre-cat (bank 2) is nothing but a bent pipe...that can't be cut at the local muffler shop. I really don't know whats inside of that piece otherwise why folks on here are spending $$ to fix this... it is way too risky to get a used one because it may be clogged as well?

 

The SES may come and go because cat. converters in general don't go from good to bad overnight. The performance of their internals are gradually diminished over time under the same routine operating conditions, unless something specific was done differently which caused them to fail. Many factors are involved including the 2k2's ECU program and the o2 sensors reading them. So the light will come and go. When stock, my light came stayed for months. I cleared it for OB-II emissions(visual only, no tail pipe probe) and it passed after I drove it about 60 miles. It came back for the same thing after about 155 mi.

 

All I know, I learned here.

The front bank pre-cat is not on the y-pipe, which is the problem here it seems. It is between the front exhaust manifold and the y-pipe. That pre-cat is a pain to get to, which is why many people just get an O2 sim. But if it is clogged, then that isn't the right fix, IMO. You can try to find a Fed/Cali spec front manifold to replace it or just get an entire set of aftermarket headers. If you do get a Fed spec manifold or racing headers, then you'll most likely need an O2 sim as well.

Also IIRC (but do more research on this), people have gotten this code because of faulty O2 sensors that are putting out signals outside the voltage range and causing the pre-cat CEL. Might want to look into that too.

This diagram should help you see what you need to replace: