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View Full Version : New E34 Owner! Won't Smog from High HC & NOx, Code 1222


E36 Phantom
10-28-2009, 11:03 PM
Hey E34 section! New E34 owner here, have bounced around from an E36, E39, and some other cars to a black on black 530i 5spd, 224k, build 03/94. I've already done the seat twist repair with help from the DIYs on here, will be doing control arms soon, but I need to take care of the smog soon so that's top priority for me.

I warmed up the car with some high-RPM WOT freeway driving for about 20min prior to smogging. I had to wait about 30 min for the smog, and left it on and idling for that period. No fuel additives or anything else were used, just Chevron 91. I have searched and found a few threads regarding code 1222 but got mixed info, so I felt it necessary to make a thread. Sorry.

Here are the results, the max allowed values are in (parentheses).

Spd.......CO2......O2........HC................... .CO.....................NOx
15.........14.1......0.2.......120 (81)............0.33 (0.47).........685 (685)
25.........14.3......0.0.......47 (47)..............0.11 (0.44).........275 (696)


The pedal trick pulled up a code 1222. I never got a code 1000 but tried holding the gas for 10+ sec anyway, but couldn't clear the codes for the life of me so I don't know how recent it is and if it's still currently a problem.

Advice is appreciated, thanks!!!

CarDriver
10-29-2009, 03:30 AM
Here is a link that explains the code 1222. the explanation is from a BMW mechanic with 20 years of experiance. I am hoping that he is correct. LOL... I do know some people that have twenty + years experiance at things but have been doing it wrong the whole time. LOL...

http://www.justanswer.com/questions/19uu7-code-1222-lambda-control-1

This link explains how to clear the codes and more.

http://www.bmwe34.net/Wiki/tiki-index.php?page=Engine+codes

I hope this helps.

E36 Phantom
10-29-2009, 10:53 AM
Thanks for the reply CD.

The weird thing is the smog shows that practically no O2 is getting through at all. At idle it doesn't smell rich or sooty, but another forum member did mention she thought it smelled a little rich when she was driving behind me on a mountain run. Do you think cleaning the MAF and SeaFoaming it could take care of the problem? Or is there something else causing it to run rich, assuming that's the issue based off the smog results. I'd rather not keep spending 30 bucks and an hour of my time each run till I think it's fully fixed.

The second link is the one I've been reading and following the directions on (found it from searching this forum), but I just can't get it to clear. :dunno: Any tips for making it clear the codes if I'm not getting the code 1000?

E36 Phantom
11-02-2009, 07:30 PM
Bump.....