Cobb AP Throwing Codes

2turbodinan · 12-10-2012, 01:33 PM

Hey guys,

I currently have the following mods: ETS fmic, BMS DCI, Vanguard Exhaust, Cobb stg 2. Twice I have gotten the following codes: p0174 (running lean), and p29E1 (mixture control 2). Anyone have the same experience why the car is throwing these codes. My ride feels pretty much the same can't really feel a decline in performance. My guess would maybe be the o2 sensor is bank 2 but i'm not sure. Chime in please. Thanks in advance.

135Pats · 12-10-2012, 03:23 PM

Quote:

Originally Posted by 2turbodinan

Hey guys,

I currently have the following mods: ETS fmic, BMS DCI, Vanguard Exhaust, Cobb stg 2. Twice I have gotten the following codes: p0174 (running lean), and p29E1 (mixture control 2). Anyone have the same experience why the car is throwing these codes. My ride feels pretty much the same can't really feel a decline in performance. My guess would maybe be the o2 sensor is bank 2 but i'm not sure. Chime in please. Thanks in advance.

When my precat 02 went bad I got P2CAB and P2CA7 codes, I got it replaced within a week so I didn't bother checking AFRs and whatnot, but the car felt more or less OK. The day I took it in it was not a happy camper on cold start, didn't throw misfire codes but it was stumbling all over the place until it got warm.

JStang · 12-10-2012, 03:24 PM

Quote:

Originally Posted by 2turbodinan

Hey guys,

I currently have the following mods: ETS fmic, BMS DCI, Vanguard Exhaust, Cobb stg 2. Twice I have gotten the following codes: p0174 (running lean), and p29E1 (mixture control 2). Anyone have the same experience why the car is throwing these codes. My ride feels pretty much the same can't really feel a decline in performance. My guess would maybe be the o2 sensor is bank 2 but i'm not sure. Chime in please. Thanks in advance.

Are you running E85? I had that code once when I was blending a small amount of E85 with 93 octane.

2turbodinan · 12-11-2012, 01:32 AM

Quote:

Originally Posted by JStang

Quote:

Originally Posted by 2turbodinan

Hey guys,

I currently have the following mods: ETS fmic, BMS DCI, Vanguard Exhaust, Cobb stg 2. Twice I have gotten the following codes: p0174 (running lean), and p29E1 (mixture control 2). Anyone have the same experience why the car is throwing these codes. My ride feels pretty much the same can't really feel a decline in performance. My guess would maybe be the o2 sensor is bank 2 but i'm not sure. Chime in please. Thanks in advance.

Are you running E85? I had that code once when I was blending a small amount of E85 with 93 octane.

No, just using 91 octane. Never tried e85. Any other thoughts?

enrita · 12-11-2012, 02:26 AM

i would try to run the cobb stock map and see if it happens with that to. also you should log with both stock and stage 1 .... AFR both banks and STFT both banks.

JamesM3M5 · 12-11-2012, 11:07 AM

Logging will help you determine whether to change the pre-cat O2 sensors or not. Also, how many miles on the car?

oel · 12-11-2012, 02:42 PM

not sure if relevant to the codes, but shouldn't you be running stage 1+ as opposed to stage 2?

2turbodinan · 12-11-2012, 02:57 PM

Quote:

Originally Posted by oel

not sure if relevant to the codes, but shouldn't you be running stage 1+ as opposed to stage 2?

Haha! I should be with the current mod list. I forgot to mention I have vrsf downpipes. That probably changes a lot. Thanks for pointing that out.

2turbodinan · 12-11-2012, 02:58 PM

Quote:

Originally Posted by JamesM3M5

Logging will help you determine whether to change the pre-cat O2 sensors or not. Also, how many miles on the car?

I have about 62,000 miles on the car. I also forgot to mention I have downpipes, which is pretty important considering I came here asking why my car is throwing codes

maxipad96 · 12-11-2012, 04:36 PM

Doesn't cobb Stage 2 require downpipes? You didn't list those in your mods.

12-10-2012, 01:33 PM	#1
2turbodinan Private First Class 8 Rep 147 Posts Drives: e93 Join Date: Jan 2010 Location: Upland, Ca iTrader: (0)	Cobb AP Throwing Codes Hey guys, I currently have the following mods: ETS fmic, BMS DCI, Vanguard Exhaust, Cobb stg 2. Twice I have gotten the following codes: p0174 (running lean), and p29E1 (mixture control 2). Anyone have the same experience why the car is throwing these codes. My ride feels pretty much the same can't really feel a decline in performance. My guess would maybe be the o2 sensor is bank 2 but i'm not sure. Chime in please. Thanks in advance.
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12-11-2012, 02:26 AM	#5
enrita Major General 161 Rep 7,377 Posts Drives: 335i - Big turbos Join Date: Sep 2008 Location: Italian in Sweden iTrader: (0)	i would try to run the cobb stock map and see if it happens with that to. also you should log with both stock and stage 1 .... AFR both banks and STFT both banks. __________________ 07 335i AT - MOTIV 750 - MHD E85 BMS flash - BMS PI - JB4G5 - Okada Coils - NGK 5992 Plugs - Helix IC - Snow Stg. 3 - Stett CP - Custom midpipes with 100 HJS Cats - Bastuck Quad - PSS10 - QUAIFE LSD - BMS OCC - Forge DVs - AR OC - ALCON BBK - M3 Chassi - Dinan CP - Velocity M rear Toe arms - Advan RZ-DF - LUX H8 - Level 10 AT upgrade
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12-11-2012, 11:07 AM	#6
JamesM3M5 Some dude 91 Rep 1,780 Posts Drives: E92 335i Join Date: Sep 2011 Location: Northern VA iTrader: (0)	Logging will help you determine whether to change the pre-cat O2 sensors or not. Also, how many miles on the car? __________________ RRT E92 335i/6MT with stuff and things
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12-11-2012, 02:42 PM	#7
oel Lieutenant 28 Rep 441 Posts Drives: 09' E90 335i, 13' E92 M3 Join Date: Oct 2006 Location: Vancouver, BC iTrader: (19) Garage List 2009 E90 335i [0.00]	not sure if relevant to the codes, but shouldn't you be running stage 1+ as opposed to stage 2?
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12-11-2012, 04:36 PM	#10
maxipad96 First Lieutenant 26 Rep 318 Posts Drives: 335 E90 Join Date: Dec 2010 Location: Atlanta iTrader: (3)	Doesn't cobb Stage 2 require downpipes? You didn't list those in your mods.
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