Mixture control codes

Tworl28 · 06-17-2016, 01:14 PM

Check engine light came on and i have 2 mixture control codes.
29E0 / 29E1
Mixture control / mixture control 2
I am now getting about 16mpg instead of around 19-20avg. Car also stalls out on cold starts, but seems to run O.K. when warmed up. Seems rather sluggish
My car is a 2010 128i N51

Anyone have similar issues? Any suggestions? Haven't had too much time to diagnose this problem but I will post updates when I get to it.

ianc · 06-19-2016, 09:35 PM

O2 sensors?

ianc

Tworl28 · 07-07-2016, 12:07 PM

I did some more research on my problem, turns out its p0171/p0174 codes. bank 1 and bank 2 LEAN. Did a smoke test but came up empty handed.

Tworl28 · 07-19-2016, 03:22 PM

Replaced the MAF sensor, nothing changed. Still struggling on cold start but runs fine when warm. Now getting 15mpg... This car is driving me nuts!

Tworl28 · 08-05-2016, 08:44 AM

Checked fuel pressure and it tested very low (3.5 bar) so I'm thinking fuel pump or pressure regulator. I dropped my 1er at BMW on tuesday and they informed me its a fuel delivery issue. They will be replacing my fuel tank 100% covered under SULEV warranty. WHEW! Thought all hope was lost! BMW really came through for me here

06-17-2016, 01:14 PM	#1
Tworl28 Private 12 Rep 72 Posts Drives: 128i Join Date: Apr 2015 Location: NJ iTrader: (0) Garage List 2010 BMW [0.00]	Mixture control codes Check engine light came on and i have 2 mixture control codes. 29E0 / 29E1 Mixture control / mixture control 2 I am now getting about 16mpg instead of around 19-20avg. Car also stalls out on cold starts, but seems to run O.K. when warmed up. Seems rather sluggish My car is a 2010 128i N51 Anyone have similar issues? Any suggestions? Haven't had too much time to diagnose this problem but I will post updates when I get to it.
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06-19-2016, 09:35 PM	#2
ianc Ex '87 Carrera 248 Rep 1,259 Posts Drives: '10 TiAg 6MT 135i Join Date: Feb 2010 Location: Redwood Shores, California iTrader: (0)	O2 sensors? ianc
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07-07-2016, 12:07 PM	#3
Tworl28 Private 12 Rep 72 Posts Drives: 128i Join Date: Apr 2015 Location: NJ iTrader: (0) Garage List 2010 BMW [0.00]	I did some more research on my problem, turns out its p0171/p0174 codes. bank 1 and bank 2 LEAN. Did a smoke test but came up empty handed.
	Appreciate 0 Quote

07-19-2016, 03:22 PM	#4
Tworl28 Private 12 Rep 72 Posts Drives: 128i Join Date: Apr 2015 Location: NJ iTrader: (0) Garage List 2010 BMW [0.00]	Replaced the MAF sensor, nothing changed. Still struggling on cold start but runs fine when warm. Now getting 15mpg... This car is driving me nuts!
	Appreciate 0 Quote

08-05-2016, 08:44 AM	#5
Tworl28 Private 12 Rep 72 Posts Drives: 128i Join Date: Apr 2015 Location: NJ iTrader: (0) Garage List 2010 BMW [0.00]	Checked fuel pressure and it tested very low (3.5 bar) so I'm thinking fuel pump or pressure regulator. I dropped my 1er at BMW on tuesday and they informed me its a fuel delivery issue. They will be replacing my fuel tank 100% covered under SULEV warranty. WHEW! Thought all hope was lost! BMW really came through for me here
	Appreciate 0 Quote