fuel mixture fault codes help. - Page 2 - BMW 3-Series (E90 E92) Forum

robc1976 · 12-02-2012, 10:45 PM

Quote:

Originally Posted by aflyrice

You had the codes for 3 months and did you experience any misfires while you had these codes?

I had misfires quite a bit asociated with maxed out trims, fuel pressure diving exspeacialy when I went to RB's. Installed new O2's and codes went away. After that I installed the cobb AP with BMS backend flash wich really smoothed out things. But the culprit for my fuel mixture codes where the O2's (primary).

aflyrice · 12-02-2012, 10:58 PM

Quote:

Originally Posted by robc1976

I had misfires quite a bit asociated with maxed out trims, fuel pressure diving exspeacialy when I went to RB's. Installed new O2's and codes went away. After that I installed the cobb AP with BMS backend flash wich really smoothed out things. But the culprit for my fuel mixture codes where the O2's (primary).

I see. Hopefully the o2s aren't too painful to replace.

robc1976 · 12-02-2012, 11:13 PM

Quote:

Originally Posted by aflyrice

I see. Hopefully the o2s aren't too painful to replace.

30 min job tops! rememer to not twist the wires when installing them.

1. Remove engine cover
2. remove/unplug both connectors (black wired O2 goes to front Dp, Grey goes to rear Dp)
3.free both wires from clips around valve cover
4. take belly pan off
5. undo both sterring rack bolts and move seering rack out of the way
6. remove 02 sensors and reverse steps.

aflyrice · 12-02-2012, 11:46 PM

Quote:

Originally Posted by robc1976

30 min job tops! rememer to not twist the wires when installing them.

1. Remove engine cover
2. remove/unplug both connectors (black wired O2 goes to front Dp, Grey goes to rear Dp)
3.free both wires from clips around valve cover
4. take belly pan off
5. undo both sterring rack bolts and move seering rack out of the way
6. remove 02 sensors and reverse steps.

Thanks for the step by step but is there any special tools that you would recommend for the job? Did you use any reverse torx sockets or o2 socket wrench stubby wrench etc. I know i've been asking a lot of questions but I would just like to have everything I need instead of making runs back and forth to the store.

aflyrice · 12-06-2012, 02:40 PM

Decided to unplug and plug in the o2 sensors and reset adaptations and ecu while waiting for the new ones to come in.Still getting the codes but not as frequent and SES light is no longer popping up but then again its only been a couple days.

NiVeDh · 12-06-2012, 03:07 PM

Quote:

Originally Posted by aflyrice

Thanks for the step by step but is there any special tools that you would recommend for the job? Did you use any reverse torx sockets or o2 socket wrench stubby wrench etc. I know i've been asking a lot of questions but I would just like to have everything I need instead of making runs back and forth to the store.

22mm flare nut-wrench is my go-to tool for the O2 sensors. Also, E12 socket for the steering rack.

robc1976 · 12-06-2012, 03:44 PM

Quote:

Originally Posted by NiVeDh

22mm flare nut-wrench is my go-to tool for the O2 sensors. Also, E12 socket for the steering rack.

This is mine, did a RB turbo install with it and over 10 dp installs...makes it so easy LOL!! Cut off the end with a dremel so you can get clearance and still have leverage.

aflyrice · 12-06-2012, 07:43 PM

thanks for the tip fellas.

sickem · 12-06-2012, 08:38 PM

Took my car in to the dealer to get looked at...they wouldn't touch it till I put the stock dps back on lol

aflyrice · 12-06-2012, 09:08 PM

Quote:

Originally Posted by sickem

Took my car in to the dealer to get looked at...they wouldn't touch it till I put the stock dps back on lol

lol. atleast they will let you put it back on instead of just turning you away.

sickem · 12-06-2012, 10:08 PM

Yes, the bastids even want me to put my stock air box back in

I have a connection at a different dealer though...gonna see if I can pull some strings.

aflyrice · 02-08-2013, 10:22 PM

new o2 sensor fixed the problem so far check engine lights has not come back.

Rickygst · 02-08-2013, 11:50 PM

I having the 29e1 code. Just got my car back from the dealer and testing it now to see if the code is coming back. Will report back later on the fix, if it is indeed fixed.

sickem · 02-09-2013, 12:30 PM

Quote:

Originally Posted by aflyrice

new o2 sensor fixed the problem so far check engine lights has not come back.

I replaced my primaries and this didnt fix the problem, but it did get rid of the lambda sensor codes.

sickem · 02-09-2013, 12:30 PM

Quote:

Originally Posted by Rickygst

I having the 29e1 code. Just got my car back from the dealer and testing it now to see if the code is coming back. Will report back later on the fix, if it is indeed fixed.

What did the dealer do?

aflyrice · 02-09-2013, 06:25 PM

Quote:

Originally Posted by sickem

I replaced my primaries and this didnt fix the problem, but it did get rid of the lambda sensor codes.

Also forgot to mention that I got my software updated

sickem · 02-09-2013, 09:27 PM

Quote:

Originally Posted by aflyrice

Also forgot to mention that I got my software updated

They reset fueling adaptations when I went but it didn't fix my issue.

Rickygst · 02-10-2013, 10:59 PM

Well they did a couple of things. They cleaned the intake valves (walnut blasting), and replaced a seal on the turbo pipe. Neither one corrected the problem. They finally replaced all six injectors. That is what I'm testing now. Thus far the code has not come back. need to drive more to be certain.

sickem · 02-11-2013, 05:35 AM

Ok, cool. Hopefully it was the injectors.

Rickygst · 02-17-2013, 01:03 AM

Have about two week on the new injectors and code has not return. So my problem appear to have been the injectors.

12-06-2012, 08:38 PM	#31
sickem Freude am fahren Drives: in the fast lane Join Date: Mar 2010 Location: People's Republic of New Jersey Posts: 1,656 iTrader: (4) Garage List 2008 BMW 335i E90 [3.10]	Took my car in to the dealer to get looked at...they wouldn't touch it till I put the stock dps back on lol __________________ Cobb AP/RR catless DPs/aFe DCI/ETS 5" FMIC/Alpina B3 TCU flash/BMW Performance Wheels

12-06-2012, 10:08 PM	#33
sickem Freude am fahren Drives: in the fast lane Join Date: Mar 2010 Location: People's Republic of New Jersey Posts: 1,656 iTrader: (4) Garage List 2008 BMW 335i E90 [3.10]	Yes, the bastids even want me to put my stock air box back in I have a connection at a different dealer though...gonna see if I can pull some strings. __________________ Cobb AP/RR catless DPs/aFe DCI/ETS 5" FMIC/Alpina B3 TCU flash/BMW Performance Wheels

02-11-2013, 05:35 AM	#41
sickem Freude am fahren Drives: in the fast lane Join Date: Mar 2010 Location: People's Republic of New Jersey Posts: 1,656 iTrader: (4) Garage List 2008 BMW 335i E90 [3.10]	Ok, cool. Hopefully it was the injectors. __________________ Cobb AP/RR catless DPs/aFe DCI/ETS 5" FMIC/Alpina B3 TCU flash/BMW Performance Wheels

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12-06-2012, 02:40 PM	#27
aflyrice Private First Class Drives: E90 335i Join Date: Apr 2010 Location: CA Posts: 146 iTrader: (1)	Decided to unplug and plug in the o2 sensors and reset adaptations and ecu while waiting for the new ones to come in.Still getting the codes but not as frequent and SES light is no longer popping up but then again its only been a couple days.

12-06-2012, 07:43 PM	#30
aflyrice Private First Class Drives: E90 335i Join Date: Apr 2010 Location: CA Posts: 146 iTrader: (1)	thanks for the tip fellas.

02-08-2013, 10:22 PM	#34
aflyrice Private First Class Drives: E90 335i Join Date: Apr 2010 Location: CA Posts: 146 iTrader: (1)	new o2 sensor fixed the problem so far check engine lights has not come back.

02-08-2013, 11:50 PM	#35
Rickygst Private Drives: 335i Join Date: Jun 2010 Location: Atlanta Posts: 61 iTrader: (0)	I having the 29e1 code. Just got my car back from the dealer and testing it now to see if the code is coming back. Will report back later on the fix, if it is indeed fixed.

02-10-2013, 10:59 PM	#40
Rickygst Private Drives: 335i Join Date: Jun 2010 Location: Atlanta Posts: 61 iTrader: (0)	Well they did a couple of things. They cleaned the intake valves (walnut blasting), and replaced a seal on the turbo pipe. Neither one corrected the problem. They finally replaced all six injectors. That is what I'm testing now. Thus far the code has not come back. need to drive more to be certain.

02-17-2013, 01:03 AM	#42
Rickygst Private Drives: 335i Join Date: Jun 2010 Location: Atlanta Posts: 61 iTrader: (0)	Have about two week on the new injectors and code has not return. So my problem appear to have been the injectors.