Check engine light

[hummerman88]

as some of you know, i just dropped in my catless header and i will be dropping on the catback within the next few weeks. since im running catless, my check engine light went on. i know i can just put in an 02 sim, but im not all about having to get int welded on and all, and i have heard that they sometimes die after a few monthes. my question is this, if i were to take my car to xotic motorsports or some other place that does tuning. could they tune my ecu into turning off the SES light? cuz my shop that does inspection wont check for my cat, they will only hook the comp up to read the ecu. if so, how much would this run me?

[specVogel]

there is no way to "tune" your car to keep the check engine light off. and to do the getto sim you dont need to weld anything. i recomend just doing the sim so you can get through emissions. if you dont want to make it yourself i can give you the name of someone who makes them for $10 shipped. i have this on my car and have never had a problem.

[USARARE1]

Your car is a 2005. So it will require a OBD2 test. Computer test and gas cap. Your monitors will need to be ready. With a O2 code you will fail the test. Even if you take the bulb out.

In order to pass the OBD2 TEST. You will have a "KEY ON ENGINE OFF LOOK" by the emission tech. He has to anwser the question in the test. But even if he did lie the code will be still in the computer once the test is completed. Result would still be a FAIL.

As long as those monitors are READY your good. Try a SIM. Or a fouler if you weld one in????


Here's something id like to mention.* IF YOU DRIVE LESS THAN #5000 miles in the state of PA. There are no visual emmission requirements! NO CAT is needed! It is not a requirement for state inspection EITHER! :mrgreen:

[04 Turbo Spec]

i am completly catless and i never had any problem with inspection. the only CEL i throw it a missfire

[blkbomber01]

well if you go catless it will throw a code... usually a "catilst system below threshold". the only way you can get though emissions is if you get the sims or know somebody to get you though

[04 Turbo Spec]

i don't have any cat and i dont throw any codes. except for a miss-fire but going through emmissions is never problem

[blkbomber01]

i don't have any cat and i dont throw any codes. except for a miss-fire but going through emmissions is never problem
wow... ive had a few cars in that dont have a light on, and it works, and they come up failed and give me a code. but i guess some of the machines are still a little screwy.

[koho2731]

Some Spec V's can run catless with no codes, but it's is very few. I had to get a sim to turn the SES off. If you have the light you will need a sim.

[hummerman88]

there is no way to "tune" your car to keep the check engine light off. and to do the getto sim you dont need to weld anything. i recomend just doing the sim so you can get through emissions. if you dont want to make it yourself i can give you the name of someone who makes them for $10 shipped. i have this on my car and have never had a problem.

can u please pm me the info on where i can buy the ghetto sim? ill just do that, and hey, if it doesnt work then its only ten bucks. worth the try

[specVogel]

pm sent

[EIXVO]

k................................................. .................................................. ................

[Omega SE]

yeah your goingto throw a code (which i got too) if you don't have a CAT. the 02 sim should help you out by bypassing the o2 sensor. i had to use the good ol' ghetto sim on mine to bypass it when i installed my header and HKS cat-back. no problems now! :mrgreen:

[Jeffros Spec V]

Just buy a spark plug non-fouler from prep boys. I think its size 18mm. you have to drill it out a little bit.

The o2 sensor screws into the non fouler, the non fouler screws into the o2 bung. What happens is the non fouler moves the o2 sensor near the edge of the exhaust instead of the middle, thus reading better air. Its worked for many people including my car.

Best part is...its like $5 for two at Pep boys.

[Buster]

I think you would have better results on the Vboard. I ran catless for the last three months I had mine with no light. You also have to keep in mind that its very very cold out so you are more likely to throw a code. Now also when you say catless are you talking about catless header or catless down pipe? Your Sig says catless header so you are just throwing the no precat code because its cold out, I would be willing to bet if you take your car out and romp on it while the light is on it will go away. And dont remove the bulb, its a specv theres always going to be something wrong with it.

[RayArroyo]

do you have an upstream and down stream 02 sensor. one on top and one on the cat area? if so its easy to fix

[hummerman88]

i have one on top and on in the cat are. all i did was take out my precat by installing the catless header.

[RayArroyo]

so both sensors are pluged in?

[Jeffros Spec V]

I was just thinking about this...doesn't the 05 have 3 o2 sensors?

Maybe that was a different model or maybe I am smoking crack.

[RayArroyo]

reason why i ask is because most cars that have an 02 sensor before the cat and on the cat throw codes because they get pretty much the same exahust temp. how we address this issue is by buying a 2 dollar spark plug non fouler and screwit on the bung the screw the 02 sensor to the non fouler. it pulls the sensor further out from the cat and allows the stock pcm to see different egt's like if there was a cat. = no codes

[cburwell]

I was just thinking about this...doesn't the 05 have 3 o2 sensors?

Maybe that was a different model or maybe I am smoking crack.

It should not make a difference either way. He just has to get that last O2 sensor to get a reading that the ECU likes.

[Jeffros Spec V]

Yeah no doubt, still wondering.

[specVogel]

the newer specs have 2 O2 sensors like all the others but on 04+ the second sensor is not in the header, its on the mid-pipe(downpipe).

[Intercooled T]

what about obd1 cars? I don't have a cat either and throw no engine light, but have an aftermarket chip...hmmm....can an aftermarket chip work as a sim, or will obd1 not care as much?

[koho2731]

what about obd1 cars? I don't have a cat either and throw no engine light, but have an aftermarket chip...hmmm....can an aftermarket chip work as a sim, or will obd1 not care as much?
OBD I cars only have the upstream O2 sensor(s) and do not monitor after the cat

[Intercooled T]

yea, I know that. i guess most OBD2 cars monitor after the cat? That sucks!

[koho2731]

all OBD II cars monitor after the cat. some that have 2 cats will have 4 O2 sensors.

[US_R33]

as some of you know, i just dropped in my catless header and i will be dropping on the catback within the next few weeks. since im running catless, my check engine light went on. i know i can just put in an 02 sim, but im not all about having to get int welded on and all, and i have heard that they sometimes die after a few monthes. my question is this, if i were to take my car to xotic motorsports or some other place that does tuning. could they tune my ecu into turning off the SES light? cuz my shop that does inspection wont check for my cat, they will only hook the comp up to read the ecu. if so, how much would this run me?
there is no way you can get your ecu tuned. do yourself a favor, call up Caspers Electronics (847)247-0484 and spend the 50 bucks on an O2 simulator........you won't have to worry about welding in an O2 bung and extending your O2 sensor wires or having the CEL come on again b/c of your header

i had one on my Spec when i installed my header and it never failed me.....i passed emissions every time as well :thumbup:

[koho2731]

there is no way you can get your ecu tuned. do yourself a favor, call up Caspers Electronics (847)247-0484 and spend the 50 bucks on an O2 simulator........you won't have to worry about welding in an O2 bung and extending your O2 sensor wires or having the CEL come on again b/c of your header

i had one on my Spec when i installed my header and it never failed me.....i passed emissions every time as well :thumbup:

That is what I had on my Spec V and it's on my Talon now both catless and both with no SES/ ck eng lights after I installed the sim. You will want www.casperselectronics.com/Merchant2/merchant.mvc?Screen=PROD&Product_Code=104052 you can use 104051 too, but it's for 2000 and older. That is the one I have and IMOP it is easier to installl because you don't need to run a grn wire, hell I didn't even have the sensor in the exhaut system

[US_R33]

i would suggest calling Caspers when placing your order....i know that they have a different O2 Sim for the 02-03 Spec V than they do for the 04-06 Spec V

[hummerman88]

hey thanks alot for that num. i think ill just go with that then, cuz id much rather put out the money and get it done right. so its something that i can just screw in a wire up? no welding?

[US_R33]

hey thanks alot for that num. i think ill just go with that then, cuz id much rather put out the money and get it done right. so its something that i can just screw in a wire up? no welding?
not sure how you screw in a wire lol.....you follow the instructions to wire in the O2 sim. if you'd like to come down to my place i'd be more than happy to install it for ya :thumbup:

fyi.....you don't have headers you have a header :wink:

[koho2731]

i would suggest calling Caspers when placing your order....i know that they have a different O2 Sim for the 02-03 Spec V than they do for the 04-06 Spec V
There is only one sim for all years 2001+ and it's the 104052 PN

[US_R33]

There is only one sim for all years 2001+ and it's the 104052 PN
when i ordered my O2 sim they specifically asked what year my Spec was b/c the ecu reads differently depending on what year the car is....unless they some how managed to get around 2 different ecu programs then there are 2 different sims

i believe the issue was that the 02-03 ecu utilizes a narrowband O2 sensor while the 04-06 utilizes a wideband O2 sensor.....but you can double check this i'm sure in B15Sentra.net (http://www.b15sentra.net)

[koho2731]

Not for the #2 O2 sensor the are the same PN from Nissan the #1 O2 sensor is different. When I got my sim when I called them they told me taht the 104051 was the right O2 sim for my Sentra(03) then the sent Mavrick31(03) the 104052 both worked fine.

[US_R33]

:shrug: never hurts to double check :wink: