Does anybody know the answer?

[Sick96Stang]

It seems like everybody who has put an O/R pipe on there car with MIL's still has the check engine light come on. Does anybody know how to fix this for good? I heard u can get your rear o2 sensors turned off but now I hear people saying even doing that they still get the check engine light that reads for the o2 sensor. Does anybody know the permanent way to get rid of the check engine light with an O/R pipe? I'm clueless as how to fix it. I had my O/R H-pipe on for about a month then the check engine light comes on even though I have MIL's. Get the codes pulled and its for the o2 sensor bank 2 sensor 2. So I went and got that replaced and the check engine light is off for about 3 weeks then comes back on. Go get the codes pulled again exact same thing o2 sensor bank 2 sensor 2. I dont understand it cant be the o2 sensor since I just got it replaced and if it was the MIL's I dont see why the check engine light would have gone off for 3 weeks when I put the new o2 sensor on. I just want to know how to fix this for good does anybody know how to?

 

[4.6BOOSTIN']

I had a problem similar to that. I have a bassani o/r x-pipe with MIL. My light came on after reinstalling my exhaust after putting in a centerforce clutch. For a couple weeks I had no idea why my warning light came on when i only swapped a clutch. While polishing my intake one day I noticed a vacuum hose that connects to my EGR sensor was accidentally pulled off while removing the bell housing. After hooking up the hose,the light turned off. My OBD-II sensors did a good job warning me. If all else fails... reset your computer by undoing your battery for a couple minutes! This wil keep the light off for a while. The computer messes with the fuel and timing when the light is on.

 

[CATMACH]

Sounds like crappy mil's other people have had the same problem. A predator hand held tuner can turn off the rear 02's, maybe others can too.

 

[tomustang]

i gave up and pulled the check engine bulb out.

 

[mcmmotorsports]

I've gone 4,000 miles with my MIL eliminators that I made myself and no light for me.

 

[madmatt]

i gave up and pulled the check engine bulb out.

This is a VERY bad idea. What happens if something REALLY wrong happens and you dont know about it until you start hearing your engine knocking. I dunno man, just get some better Mil elims and be safe.

 

[Cobra Jay]

This is a VERY bad idea. What happens if something REALLY wrong happens and you dont know about it until you start hearing your engine knocking. I dunno man, just get some better Mil elims and be safe.

I havn't had a problem with mine. (knock on wood)

 

[COBRA90GT]

Have you tried PEP's MIL eliminators yet?

http://www.ponyexpressperformance.com

Also, perhaps the problem is NOT the MIL eliminators. It could, very possibly, be something related to the install that is the culprit. Check out the following FAQ on the PEP website for troubleshooting ideas:

http://www.ponyexpressperformance.com/MILtech.html

It's perfectly plausible that your O2 sensor went "bad" again.

Pulling the check engine light bulb is not a good idea because then you won't really know when your PCM/computer is throwing another DTC (diagnostic trouble code) aside from the one related to your midpipe install. Go through the troubleshooting FAQ and try to pinpoint the problem...

 

[codyGT]

Pulling your SES bulb is the worst thing you can do. Most cars run a different set of parameters when SES is on. If a sensor fails the computer has to make up for it by running a standard program.

All you are doing is losing performance this way.

 

[eleanor'03]

i put pony express mil eliminators on. It worked for a bout 20 miles. Then it came back on. I took them back off cuz i thought they were installed wrong. Nothing seemed wrong. I did the installation all over again, but made sure only the right wires touched and taped them up. originally i had the wires soldered but two different kinds touched when i taped them up. dont kno if that was it but, i put it back in and it didnt work. I forgot to disconnect battery so i did that...gave it like 10 mins and it was gone...i've driven a couple hundred miles and no ses light yet..??