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      12-10-2012, 02:33 PM   #1
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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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      12-10-2012, 04:23 PM   #2
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Quote:
Originally Posted by 2turbodinan View Post
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.
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      12-10-2012, 04:24 PM   #3
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Quote:
Originally Posted by 2turbodinan View Post
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.
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      12-11-2012, 02:32 AM   #4
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Quote:
Originally Posted by JStang
Quote:
Originally Posted by 2turbodinan View Post
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?
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      12-11-2012, 03:26 AM   #5
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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.
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      12-11-2012, 12:07 PM   #6
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Logging will help you determine whether to change the pre-cat O2 sensors or not. Also, how many miles on the car?
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      12-11-2012, 03:42 PM   #7
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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, 03:57 PM   #8
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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.
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      12-11-2012, 03:58 PM   #9
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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
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      12-11-2012, 05:36 PM   #10
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Doesn't cobb Stage 2 require downpipes? You didn't list those in your mods.
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