AFR at 20 while WOT Jb4. 2c3f code

chesticals · 11-11-2016, 05:22 PM

Hey guys

I keep getting thrown into map 4 when ever I get a half decent wot pull. I'm also getting 2c3f code for "dme internal error lamba probe evaluation". It's super annoying

This seemed to happen around the same time I put my coilovers in, and about 2 weeks after installing inlets and down pipes.

From searching all I could find is that the wires might be shorted.

I went and did some data logs today (will post when home) and the afr seems to act OK at light throttle then when I give it some gas it holds flat line at 20. By the third log it seemed to be doing it every time I gave it gas. Keep in mind it's super wet here right now and I'm getting minimal traction, but log 2 I had a pretty good pull in third and fourth.

Any insight appreciated!
Thanks

Ginger_Extract · 11-11-2016, 05:42 PM

Check your O2 sensors, sounds like you may have damaged them. 20:1 AFR is just asking for a blown motor.

chesticals · 11-11-2016, 05:49 PM

Ok Ill look into that.

Here are the datalogs:

chesticals · 11-12-2016, 12:02 PM

Bump

The Wind Breezes · 11-12-2016, 12:13 PM

Did you replace your o2 sensors yet? Nobody can do anything for you until you try that.

chesticals · 11-12-2016, 12:48 PM

Was hoping for more insight before I throw parts at it that it might not need

The Wind Breezes · 11-12-2016, 12:56 PM

Quote:

Originally Posted by chesticals

Was hoping for more insight before I throw parts at it that it might not need

dme internal error lamba probe evaluation

This... means the o2 sensor readings do not make sense to the ECU. This is not a normal result of being tuned or even having a JB4, it is a result of your o2 sensors going bad or not being installed / hooked up right.

Make sure your shit is properly plugged in and the wires aren't messed up. You probably messed up something either during the initial install or when you did the coils. Or your O2 sensor(s) came loose who knows.

chesticals · 11-12-2016, 01:30 PM

OK cool, thanks. I'm heading out to take a look now

mike@x-ph.com · 11-20-2016, 04:56 PM

Quote:

Originally Posted by chesticals

Hey guys

I keep getting thrown into map 4 when ever I get a half decent wot pull. I'm also getting 2c3f code for "dme internal error lamba probe evaluation". It's super annoying

This seemed to happen around the same time I put my coilovers in, and about 2 weeks after installing inlets and down pipes.

From searching all I could find is that the wires might be shorted.

I went and did some data logs today (will post when home) and the afr seems to act OK at light throttle then when I give it some gas it holds flat line at 20. By the third log it seemed to be doing it every time I gave it gas. Keep in mind it's super wet here right now and I'm getting minimal traction, but log 2 I had a pretty good pull in third and fourth.

Any insight appreciated!
Thanks

Are you using E85?

chesticals · 11-23-2016, 11:11 AM

Nope! New o2s just arrived but im on vacation til sunday. Will be going in on monday and i can post back with results

Kadywampes · 02-18-2019, 09:24 PM

Did the new O2 fix your issue?

Kadywampes · 02-26-2019, 09:58 PM

Ok, so I figured out my issue. I smashed the Oxygen sensor wire between the intake manifold and head.

Jeff@TopGearSolutions · 02-28-2019, 04:23 PM

Quote:

Originally Posted by Kadywampes

Ok, so I figured out my issue. I smashed the Oxygen sensor wire between the intake manifold and head.

Ouch, that'll do it.

11-11-2016, 05:22 PM	#1
chesticals Private First Class 24 Rep 114 Posts Drives: 08 BMW 135i M-Package Join Date: Feb 2016 Location: British Columbia iTrader: (0)	AFR at 20 while WOT Jb4. 2c3f code Hey guys I keep getting thrown into map 4 when ever I get a half decent wot pull. I'm also getting 2c3f code for "dme internal error lamba probe evaluation". It's super annoying This seemed to happen around the same time I put my coilovers in, and about 2 weeks after installing inlets and down pipes. From searching all I could find is that the wires might be shorted. I went and did some data logs today (will post when home) and the afr seems to act OK at light throttle then when I give it some gas it holds flat line at 20. By the third log it seemed to be doing it every time I gave it gas. Keep in mind it's super wet here right now and I'm getting minimal traction, but log 2 I had a pretty good pull in third and fourth. Any insight appreciated! Thanks
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11-11-2016, 05:42 PM	#2
Ginger_Extract California-bound 383 Rep 1,480 Posts Drives: BMW 135i Join Date: Jan 2013 Location: Los Angeles, CA iTrader: (3)	Check your O2 sensors, sounds like you may have damaged them. 20:1 AFR is just asking for a blown motor. __________________ Streets of Willow: 1:27.7 CW 11/15/15; 1:29.5 CCW 8/15/15 \|\|\|\| Autoclub Speedway ROVAL (CCW): 1.52.6 - 12/2/17 Willow Springs - Big Willow (CW): 1:35.8 - 3/31/18 \|\|\|\| Buttonwillow #13 (CW): 1:59.3 1/27/18 https://www.facebook.com/JakeStumphRacing \|\|\|\| http://www.youtube.com/user/RaceMeMZ3
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11-12-2016, 12:02 PM	#4
chesticals Private First Class 24 Rep 114 Posts Drives: 08 BMW 135i M-Package Join Date: Feb 2016 Location: British Columbia iTrader: (0)	Bump
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11-12-2016, 12:13 PM	#5
The Wind Breezes Lieutenant Colonel 912 Rep 1,850 Posts Drives: 135i N55 DCT Join Date: Apr 2015 Location: USA iTrader: (0)	Did you replace your o2 sensors yet? Nobody can do anything for you until you try that.
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11-12-2016, 12:48 PM	#6
chesticals Private First Class 24 Rep 114 Posts Drives: 08 BMW 135i M-Package Join Date: Feb 2016 Location: British Columbia iTrader: (0)	Was hoping for more insight before I throw parts at it that it might not need
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11-12-2016, 01:30 PM	#8
chesticals Private First Class 24 Rep 114 Posts Drives: 08 BMW 135i M-Package Join Date: Feb 2016 Location: British Columbia iTrader: (0)	OK cool, thanks. I'm heading out to take a look now
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11-23-2016, 11:11 AM	#10
chesticals Private First Class 24 Rep 114 Posts Drives: 08 BMW 135i M-Package Join Date: Feb 2016 Location: British Columbia iTrader: (0)	Nope! New o2s just arrived but im on vacation til sunday. Will be going in on monday and i can post back with results
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02-18-2019, 09:24 PM	#11
Kadywampes Registered 0 Rep 3 Posts Drives: 135i N54 Join Date: Mar 2018 Location: Arnold,MO iTrader: (0)	Sooo Did the new O2 fix your issue?
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02-26-2019, 09:58 PM	#12
Kadywampes Registered 0 Rep 3 Posts Drives: 135i N54 Join Date: Mar 2018 Location: Arnold,MO iTrader: (0)	Ok, so I figured out my issue. I smashed the Oxygen sensor wire between the intake manifold and head.
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