Codes Thrown

JStang · 10-04-2011, 09:26 AM

Getting on the interstate this morning I gave the car about 50% throttle in third gear and it misfired and threw a SES light. The following codes were thrown:

P2DEB - ?
P2ACC - ?
P2AAF - Fuel Pump Plausibility
P29D0 - Cylinder 4 misfire
P29D9 - Misfire / Low fuel

This is the second misfire I have had since installing my AP and the only ones that are consistent are the P2AAF and P29D0. The codes thrown the other time were P2AAF, P29D0, P29D2 and P29CC.

I am hoping that I just need to swap out my plugs which I hope to do this evening. I assume there is almost 40k on the original plugs.

Anyone have any suggestions? I am running Cobb Stage 1, Aggressive with standard throttle maps. Only mod is exhaust.

enrita · 10-04-2011, 09:29 AM

yeah change plugs and see . 40K is a lot especially if you are tuned now.

BMWsky · 10-04-2011, 10:12 AM

The first 2 codes have to do with the DME, they could be responsible for the others.

JStang · 10-04-2011, 10:48 AM

Quote:

Originally Posted by BMWsky

The first 2 codes have to do with the DME, they could be responsible for the others.

My battery died this weekend and I had to install a new one. I wonder if this could be related?

Jeff@TopGearSolutions · 10-04-2011, 10:49 AM

Quote:

Originally Posted by JStang

My battery died this weekend and I had to install a new one. I wonder if this could be related?

Did you register the battery properly?

JStang · 10-04-2011, 10:50 AM

Quote:

Originally Posted by Jeff@topgearsolutions

Did you register the battery properly?

I am having that done tomorrow.

JStang · 10-06-2011, 07:17 AM

Changed my plugs last night and no misfire this morning. Car feels much better now!

BMWsky · 10-06-2011, 07:42 AM

Quote:

Originally Posted by JStang

Changed my plugs last night and no misfire this morning. Car feels much better now!

How about the other codes? Did you have the battery registered to the car?

JStang · 10-06-2011, 08:06 AM

Quote:

Originally Posted by BMWsky

How about the other codes? Did you have the battery registered to the car?

I went to my independent mechanic yesterday who used to work at my local BMW dealer. He had told me that he may or may not be able to do it depending on the software version and he was unable to do it so I have to take it to the stealership tomorrow and have it done for $100.00

However, those first two codes are not there at all times. It only popped up after my misfire.

BMWsky · 10-06-2011, 08:09 AM

Quote:

Originally Posted by JStang

I went to my independent mechanic yesterday who used to work at my local BMW dealer. He had told me that he may or may not be able to do it depending on the software version and he was unable to do it so I have to take it to the stealership tomorrow and have it done for $100.00

However, those first two codes are not there at all times. It only popped up after my misfire.

That's what drives me batty about our car, I swear the DME has Gremlins inside.

My battery will probably need to be replaced sooner rather than later and I want to use a lightweight one. I'm sure I'll have to do the same as you.

10-04-2011, 09:26 AM	#1
JStang Brigadier General 562 Rep 3,625 Posts Drives: FDB M3 CS Join Date: Dec 2010 Location: St. Petersburg, FL iTrader: (9)	Codes Thrown - No Search Results Getting on the interstate this morning I gave the car about 50% throttle in third gear and it misfired and threw a SES light. The following codes were thrown: P2DEB - ? P2ACC - ? P2AAF - Fuel Pump Plausibility P29D0 - Cylinder 4 misfire P29D9 - Misfire / Low fuel This is the second misfire I have had since installing my AP and the only ones that are consistent are the P2AAF and P29D0. The codes thrown the other time were P2AAF, P29D0, P29D2 and P29CC. I am hoping that I just need to swap out my plugs which I hope to do this evening. I assume there is almost 40k on the original plugs. Anyone have any suggestions? I am running Cobb Stage 1, Aggressive with standard throttle maps. Only mod is exhaust.
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10-04-2011, 09:29 AM	#2
enrita Major General 161 Rep 7,377 Posts Drives: 335i - Big turbos Join Date: Sep 2008 Location: Italian in Sweden iTrader: (0)	yeah change plugs and see . 40K is a lot especially if you are tuned now. __________________ 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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10-04-2011, 10:12 AM	#3
BMWsky Major 24 Rep 1,244 Posts Drives: 335i Join Date: Dec 2010 Location: Webster NY iTrader: (1)	The first 2 codes have to do with the DME, they could be responsible for the others.
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10-06-2011, 07:17 AM	#7
JStang Brigadier General 562 Rep 3,625 Posts Drives: FDB M3 CS Join Date: Dec 2010 Location: St. Petersburg, FL iTrader: (9)	Changed my plugs last night and no misfire this morning. Car feels much better now!
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