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DIY: Do It Yourself
Post here to share or improve your wrench turning skills! All BMW E46 DIY tips, tales, and projects discussed inside. Learn to work on your car and know the right BMW parts you will need!

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Old 06-10-2010, 04:39 PM   #121
frobie15
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Update on my situation. I did not pass the emissions test. Even though there were no check engine lights, it wouldn't pass.
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Old 06-10-2010, 04:42 PM   #122
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Why? Sniffer?

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Update on my situation. I did not pass the emissions test. Even though there were no check engine lights, it wouldn't pass.
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Old 06-10-2010, 04:53 PM   #123
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Sniffer wouldn't have passed even if my monitors reset. Had to take other means to get it smogged....
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Old 06-10-2010, 05:14 PM   #124
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Update on my situation. I did not pass the emissions test. Even though there were no check engine lights, it wouldn't pass.
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Old 07-23-2010, 10:35 PM   #125
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Hello,
I was able to get everything hooked up with the flashing green light which looks like everything seems to be working properly but I am still throwing 2 codes. Post Cat O2 Sensor Voltage on both sensors. I am trying to figure out a way to diagnose what the issue could possibly be.

My setup currently is:

O2 Red Sim Wire is spliced into my 12 volt wire running from my halo's to my fuse box which turns my halo's on before the car is running.

O2 Black Sim Wire is spliced into the gray O2 sensor ground.

Both O2 White Sim Wires are spliced into the black wire but also the black wire is cut before the O2 sensor.

The two things that I am thinking might be causing an issue are:

1) Possibly the codes are kicking on because the 12v wire for the halo's is not staying a consistent 12v when the car turns over causing it to lose a full 12v connection temporarily?

2) When I put the O2 white wires on the black O2 sensor wires I spliced them and then cut the wire which left an open end after where the white wire was spliced into the black wire? Possibly the open end on the black wire is causing a signal issue causing these codes to kick on.

Any input would be very appreciated since I am trying to pass emissions currently :S

Thanks,
Tim!
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Old 11-27-2010, 02:47 AM   #126
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I hate to bump such an old thread, but hey, i need some help. my story....


I cleared my SES code since my dad brought home one the other day(had to give it back the same day). Then I drove around a few miles, then decided to put the sensor in while the light was still off. I just completed the sensor today, and within 7 miles of driving since i cleared the codes, the SES light comes up again.

Do you guys think it's just because i drove around before hand with the codes cleared that it'd come up, even after i did the o2 sim? maybe i should wait to see if the SES goes away?

I can't get my hands on an obdii scanner any time soon, so any thoughts would help.
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Old 02-28-2011, 12:28 PM   #127
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curious.... how do you do away with post-cat o2 sensors all together...?
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Old 02-28-2011, 09:28 PM   #128
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I just installed headers on my car and the post o2 sensors were seized so bad in the bungs that we just cut them off, I can still hook up the o2 sims and they'll be fine correct?
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Old 02-28-2011, 09:43 PM   #129
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Quote:
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I just installed headers on my car and the post o2 sensors were seized so bad in the bungs that we just cut them off, I can still hook up the o2 sims and they'll be fine correct?
Yes.
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Old 06-16-2011, 03:18 PM   #130
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So no one in a state that does NOT have a sniffer has passed an OBDII? How about you NC boys I saw on here? Anything? I would really love to put my headers back on and pass emissions.
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Old 08-22-2011, 01:44 PM   #131
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I've passed. Many times. Though I am having problems with my o2 heaters but that is a sensor problem all in itself. Probably going to simulate heaters soon
...because I hate check engine lights in my race cars.

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Old 08-25-2011, 05:27 PM   #132
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Bump I need a straight answer. Never heard anyone say for sure if the o2 Sims work 100%, even good enough to pass an OBDII inspection like here in NC. I can deal with the CELL the other 11 months. Just want a reliable way to pass without having to pull my hair out.
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Old 03-17-2012, 10:55 PM   #133
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I'm tempted to try this, but I don't want to remove my cats if it won't pass an OBDII inspection..
My brother can inspect me, but he can't give me a sticker if it won't pass. And he won't "fudge" it, or.. use another car.. for obvious reasons.
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