I have been batting 02 codes for nearly three months now, while on-line looking for some answers I came across this item:

http://cgi.ebay.com/ebaymotors/UNIVE...Q5fCarQ5fParts

For the total cost of $9 I figured WTH….I installed it and about two weeks later, presto. All the codes cleared on thier own. I can finally get through NJ state inspection.

Codes:
• P1147
• P0158

 

Well, that's interesting.

 

Thanks for this post.

You actually spent almost 8 bucks more than what I spent to solve my problem.

All I did was goto the local auto store and buy a "Spark Plug non fouler"... drill through the end... and screw it in just like this one..

I had a P0430 for the O2 sensor just after the Cat... Issue resolved.

I'd say save your $$ and go the cheaper route. All this really does is move the O2 sensor away from the exhaust stream so it cannot get a reading. It does NOT solve the root cause of your codes.

 

So...you don't want to fix the original problem? You are just masking the issue to pass inspections?

 

These rear 02's don't affect drivable, they monitor the catalytic converters…my cats are fine and there is nothing wrong w/either 02 sensor. The route problem is Nissan’s inability to correctly map the ECU in accordance w/California spec and want to charge me $$$$ to flash....F them.

 

There is a reason those O2 sensors were put there in the first place... if they wern't needed for the overall function of the vehicle and emissions system wth would they put it there. When you have the time you should just find out whats causing the codes and fix it.

 

Cats are worthless and spending ANY money (except to bypass them ie o2 sim) is ludicrous. Cats restrict exhaust and like to clog which can cause harm (ask the altima ppl, blown engines).

Nissan did not put them there for a reason. Dumb *** emission laws did.
And no hippie babbling allowed. Do you really think some cats are going to clean up the air while all industrialized countries are spewing CO2 and toxins out like there's no tomorrow? It's negligible and not worth the problems.

 

Great post and I think this might help out alot of people.

This product leans out your car, so everyone with nitrous beware.

 

Yeah **** emissions

I'm not an environmentalist, but I am a mechanical engineer and I know how important it is to keep automobile emissions down. And we're the worlds largest polluting country because we drive a lot. Imagine if those emission standards weren't in place.

To the OP: I would not want to run lean on a daily basis. o2 sensors aren't that expensive...

 

Wow.....this is the most ignorant post I have read in quite some time.

 

There is no leaning affect w/this product if used on the down stream sensors, They have NO impact on drivability.....up stream sensors do. If I had a code indicating an upstream sensor I would probably be more concerned. The down stream sensors monitor the health of the cats…..THERE is NOTHING wrong w/my catalytic converters!!!! This is a very common problem w/02 & up Nissans and the issue is mapping for cali emissions. Its nothing more then a scam, force us into buying 02’s we don’t need and paying for a flash that should not be necessary in the first place.

BTW, 02's are over $90 and a flash is $150 plus....when you live in NJ and pay the Taxes I pay, then AND ONLY THEN can you say $hit to me about any measure of expenditures

 

All they monitor is the effectiveness of the precats...and the precats only are helpful in reducing emissions for the first 60-90 seconds after a cold start until the main cat heats up enough to cleanse the exhaust.

 

testy isn’t he. lets see here. so if your cat that is monitored by the down stream o2 sensor is not picking up the right signal because you put this thing on, and your cat is clogging thus blowing head gaskets, thus blowing your whole engine, thus costing your more - well hope you get the pic.

 

Child, the world is not your personal ashtray. The fact that other countries are polluting worse than we are today, doesn't negate our responsibilities.

I'm not saying you have to buy a bicycle and grow your own food... all you have to do is play by the rules for emissions. If you can't do that, then you shouldn't be allowed to play. It's pretty simple, and a strange thing to get angry about.

 

As I stated, this has been on-going for a few months, I work P/T at a trucking company and all employees have access to the lifts. I put my truck up and pulled off the cats....perfect. They are fine...Sorry for being "testy", if you lived in NJ (and owned a home) you'd understand.

 

+1

100% agree.

Not to mention, many states around the country are starting to do away with emissions testing altogether because its a bunch of bs. I know here in Ohio emissions has been gone for almost 3 years now, IIRC.

 

Fail

Well said, Scott.

 

Interestingly, on Maxima the efficiency of the real CAT is never monitored. I do not understand how Nissan got away with that one! There is no O2 sensor *after* catalytic converter on Maxima.

- Vikas

 

UH-OH, I hope this isn't for the pathfinder........

I just did an engine on an '02 pathfinder, it had a code for one of the cat's. After the fact I found out the reason for failure was as follows:

5 of 6 butterfly valves dislodged & clogged a cylinder. Oil consumption was so bad the oil light would kick on when it was do for a change. The cats were junk and had probably taken out the rings (along with the butterfly screws). Because of the oil consumption the cylinder 5 exhaust lifter was toasted.

Cost her just shy of $4k.

I'd unbolt your upper plenum and loctite your screws then pull off your cats and gut them, they are probably chipped & clogged like hers were. How many miles and what is your oil consumption? Her mileage was 175k, she has also been talking back and forth with the lawyers @ Nissanengineclassaction.com and it looks like down the road she will be reimbursed, and hopefully give her mechanic a nice tip for telling her about that.

 

Well aware of the BF screw issue, I have no oil consumption and my Pre-cats have yet to cause me any headache...I will pull off and gut them eventually but not while I live in NJ..emission/SES light are a pain in the a$$ to deal with in this corrupt F-ing state. I currently have 78K on her now and after talking with other Pathy owners we have determined a range of vin's which were improperly assembled w/o loctite on the screws (which were supposed to be applied) while this is simply speculation there is a measure of consistency with the Vin's. Mine is not in the mix. I wish these vehicles were still being assembled in Japan, I would gladly pay the extra few bucks incurred by the end user for some piece of mind, FU Decherd, Tennessee

 

I will get you her vin in a few days, I noticed that the replacement '02 motor did have red loctite, but it all got redone and tightened down until the heads stripped out

As for the gutting/ses issue, GUT THEM. If you have a dual output o2 sim properly wired in you don't have to worry, hers are gutted now with sims, no problems.

Anyways, glad to hear you have no oil consumption.