Need help for the first time in 7 years!!!

MRJCB · 03-18-2014, 07:06 AM

Hi everyone,

I’m not much of a poster since normally I can find all the information I need. But recently the car started giving fault codes. It started with a battery message and:
P2c3b Lamba probe before catalyst
P2a2b Mixture control lambda
P29cd Misfire cyl 1
P29cf Misfire cyl 3
P29ce Misfire cyl 2
P29cc Multiple misfires
P29e0 Mixture control
This was on my winter tune a 13 psi roadcourse file (from a local shop). Then an indy shop replaced three coils (without consulting me) and a new battery, I guess cyl 1-3 and a full reset with inpa was done. Car drove normal for one or two days.
The all the same codes popped up + P2c77 (O2 post cat lambda signal), and also all the same codes with an H instead of a P before the codes + H29d9.

I the switched over to my summer file (PTF pro tune on 98 RON). When I drove away immediately I got the following codes:
P2a18 DMTL heating control
P29cf Misfire cyl 3
P29ce Misfire cyl 2
P29cc Multiple misfires

Other details on the car:
Have run two tanks of E40 three months back (tune not finalized yet), since then only 98 RON.
It’s a 2007/04 335i E92 with:
ETS 5” intercooler
Stett intake
BMS catless DP’s
Full Milltek exhaust
Forge DV’s
Car never gave any fault codes until now.

Could someone please help me with what would be the most sensible way of checking parts in a particular order?

Thx!!!

JStang · 03-18-2014, 07:25 AM

Looks like a bank one issue. Let's start with the easy, cheap fix which would be spark plugs. When were they last changed? From there I would look into injectors.

MRJCB · 03-18-2014, 07:31 AM

thx!!!

I forgot to mention that. Sparkplugs were done almost a year ago, 10K kilometers.

BAL278 · 03-18-2014, 08:32 AM

Try it on stock map first, if it runs fine stock, but not on your tune.. then try plugs

techwhiz · 03-18-2014, 12:38 PM

I'd say bad injectors. You have removed the 02 sensors I presume? otherwise bad pre-cat 02 sensor.

gtaccord · 03-18-2014, 01:40 PM

Plugs

MRJCB · 03-19-2014, 06:15 AM

thx everyone sofar.
I'm gonna try the stock tune now, then plugs and then o2 sensors.

flexinator · 03-19-2014, 07:19 AM

Sounds like an o2 sensor based on all the faults. I'd try that first. Also make sure the shop didn't unplug the o2s and then mix up the wires when they plugged them back in

secretsquirrel · 03-19-2014, 07:55 AM

Quote:

Originally Posted by flexinator

Sounds like an o2 sensor based on all the faults. I'd try that first.

It would be odd to have misfires on all cylinders on just one bank and it not be related to an o2.

Jklad · 03-19-2014, 08:27 AM

Quote:

Originally Posted by secretsquirrel

Quote:

Originally Posted by flexinator

Sounds like an o2 sensor based on all the faults. I'd try that first.

It would be odd to have misfires on all cylinders on just one bank and it not be related to an o2.

That's what happened to me when my dme fried...

FRMTL2_335i · 03-19-2014, 08:41 AM

i had almost the same codes when my LPFP was going out and again when my front pre-cat o2 went out after the exhaust wheel hit the tip of it, LOL.... after i replaced it they went away

P2c3b Lamba probe before catalyst
P2a2b Mixture control lambda
P29cd Misfire cyl dont remember which cylinders were misfiring
P29cf Misfire cyl
P29ce Misfire cyl
P29cc Multiple misfires
P29e0 Mixture control

MRJCB · 03-19-2014, 11:28 AM

thx again everybody. I'll keep this thread updated as I find the solution.

j1gilles · 03-19-2014, 12:07 PM

Leaking injectors 100%.... Pull the plugs and check..

MRJCB · 04-14-2014, 02:00 PM

Hi everyone,

Thx again for the replies and suggestions. The car is running strong again.
In the end it was indeed a bad o2 sensor.

BAL278 · 04-14-2014, 02:50 PM

Quote:

Originally Posted by MRJCB

Hi everyone,

Thx again for the replies and suggestions. The car is running strong again.
In the end it was indeed a bad o2 sensor.

the pre-cat sensor right?

MRJCB · 04-14-2014, 03:08 PM

Yes

Julian2485 · 05-09-2015, 06:33 PM

Quote:

Originally Posted by MRJCB

Yes

Which precat O2 went bad? Never mind most likely it was bank 1 I just Re read and saw you had misfires in cyl 1-3

03-18-2014, 07:06 AM	#1
MRJCB Private 23 Rep 90 Posts Drives: M4 Join Date: Jan 2012 Location: Rotterdam iTrader: (0)	Need help for the first time in 7 years!!! Hi everyone, I’m not much of a poster since normally I can find all the information I need. But recently the car started giving fault codes. It started with a battery message and: P2c3b Lamba probe before catalyst P2a2b Mixture control lambda P29cd Misfire cyl 1 P29cf Misfire cyl 3 P29ce Misfire cyl 2 P29cc Multiple misfires P29e0 Mixture control This was on my winter tune a 13 psi roadcourse file (from a local shop). Then an indy shop replaced three coils (without consulting me) and a new battery, I guess cyl 1-3 and a full reset with inpa was done. Car drove normal for one or two days. The all the same codes popped up + P2c77 (O2 post cat lambda signal), and also all the same codes with an H instead of a P before the codes + H29d9. I the switched over to my summer file (PTF pro tune on 98 RON). When I drove away immediately I got the following codes: P2a18 DMTL heating control P29cf Misfire cyl 3 P29ce Misfire cyl 2 P29cc Multiple misfires Other details on the car: Have run two tanks of E40 three months back (tune not finalized yet), since then only 98 RON. It’s a 2007/04 335i E92 with: ETS 5” intercooler Stett intake BMS catless DP’s Full Milltek exhaust Forge DV’s Car never gave any fault codes until now. Could someone please help me with what would be the most sensible way of checking parts in a particular order? Thx!!!
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03-18-2014, 07:25 AM	#2
JStang Brigadier General 563 Rep 3,625 Posts Drives: FDB M3 CS Join Date: Dec 2010 Location: St. Petersburg, FL iTrader: (9)	Looks like a bank one issue. Let's start with the easy, cheap fix which would be spark plugs. When were they last changed? From there I would look into injectors.
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03-18-2014, 07:31 AM	#3
MRJCB Private 23 Rep 90 Posts Drives: M4 Join Date: Jan 2012 Location: Rotterdam iTrader: (0)	thx!!! I forgot to mention that. Sparkplugs were done almost a year ago, 10K kilometers.
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03-18-2014, 08:32 AM	#4
BAL278 Major 48 Rep 1,010 Posts Drives: E92 335xi JB Join Date: Jun 2011 Location: North NJ iTrader: (3)	Try it on stock map first, if it runs fine stock, but not on your tune.. then try plugs __________________ 2008 335xi Jet Black//Coral Red VTT Stage 1+// Procede V5//VRSF DPs//AMS FMIC//KW V1//M3 Sways & Sub Bushings// Alpina AT flash Apex EC-7//Michelin PSS//Dinan CAI
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03-18-2014, 12:38 PM	#5
techwhiz Colonel 453 Rep 2,973 Posts Drives: e90 335i Sedan - Arctic Join Date: Feb 2012 Location: Bay Area, Ca iTrader: (4)	I'd say bad injectors. You have removed the 02 sensors I presume? otherwise bad pre-cat 02 sensor. __________________ Arctic Metallic\CF Splitters, Spoiler, Mirror Covers\LED Tails\LSD\Tinted\Coded\Apex Square SM10-19"\LED Angel Eyes\Gloss Black Grill\Integrated V1 & Galaxy Tab\M-Performance Brakes\Cobb Tuned\xHP Flash\Resonator Removed and -> is your friend.
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03-18-2014, 01:40 PM	#6
gtaccord Major 56 Rep 1,465 Posts Drives: 2009 BMW 335xi Join Date: Feb 2012 Location: Maryland iTrader: (7) Garage List 2009 BMW 335i xdrive [0.00]	Plugs
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03-19-2014, 06:15 AM	#7
MRJCB Private 23 Rep 90 Posts Drives: M4 Join Date: Jan 2012 Location: Rotterdam iTrader: (0)	thx everyone sofar. I'm gonna try the stock tune now, then plugs and then o2 sensors.
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03-19-2014, 07:19 AM	#8
flexinator Captain 86 Rep 639 Posts Drives: 2011 335xi coupe Join Date: Oct 2007 Location: US iTrader: (2) Garage List 2008 335xi [0.00]	Sounds like an o2 sensor based on all the faults. I'd try that first. Also make sure the shop didn't unplug the o2s and then mix up the wires when they plugged them back in
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03-19-2014, 08:41 AM	#11
FRMTL2_335i Major 76 Rep 1,071 Posts Drives: E92 335i Join Date: Mar 2013 Location: ohio iTrader: (1)	i had almost the same codes when my LPFP was going out and again when my front pre-cat o2 went out after the exhaust wheel hit the tip of it, LOL.... after i replaced it they went away P2c3b Lamba probe before catalyst P2a2b Mixture control lambda P29cd Misfire cyl dont remember which cylinders were misfiring P29cf Misfire cyl P29ce Misfire cyl P29cc Multiple misfires P29e0 Mixture control __________________ FFTEC 6466 Gen2, MHD Flash Tuned by Wedge, BMS PI Kit, FUEL-IT Stg 3 pump, HALTECH PS-1000, MFactory LSD w/lock down brace, ECS Trailing Arms, M3 control arms, M3 brace, DGR Coilovers, N20 tmap sensor, BMS OCC, VRSF exhaust w/4" tips, VRSF CP, Tial BOV. BigTom FMIC, Msport front & rear, m3 sides skirts.
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03-19-2014, 11:28 AM	#12
MRJCB Private 23 Rep 90 Posts Drives: M4 Join Date: Jan 2012 Location: Rotterdam iTrader: (0)	thx again everybody. I'll keep this thread updated as I find the solution.
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03-19-2014, 12:07 PM	#13
j1gilles Captain 51 Rep 719 Posts Drives: 2009 335xi Join Date: Feb 2013 Location: Chicago iTrader: (0)	Leaking injectors 100%.... Pull the plugs and check.. __________________ ASE master tech (many moons ago)335xi- JB4 G5 iso/e50 custom flash/Custom meth/Borla mids/Custom x-pipe/DCI/ER charge pipe/Dual Ebay BOV's/Alpina B3 flash/Paddle shifter retro fit
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04-14-2014, 02:00 PM	#14
MRJCB Private 23 Rep 90 Posts Drives: M4 Join Date: Jan 2012 Location: Rotterdam iTrader: (0)	Hi everyone, Thx again for the replies and suggestions. The car is running strong again. In the end it was indeed a bad o2 sensor.
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04-14-2014, 03:08 PM	#16
MRJCB Private 23 Rep 90 Posts Drives: M4 Join Date: Jan 2012 Location: Rotterdam iTrader: (0)	Yes
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