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      11-11-2016, 05:22 PM   #1
chesticals
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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
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Check your O2 sensors, sounds like you may have damaged them. 20:1 AFR is just asking for a blown motor.
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      11-11-2016, 05:49 PM   #3
chesticals
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Ok Ill look into that.

Here are the datalogs:
Attached Files
File Type: zip datalogs nov 11.zip (10.3 KB, 44 views)
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      11-12-2016, 12:02 PM   #4
chesticals
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Bump
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      11-12-2016, 12:13 PM   #5
The Wind Breezes
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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
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Was hoping for more insight before I throw parts at it that it might not need
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      11-12-2016, 12:56 PM   #7
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Quote:
Originally Posted by chesticals View Post
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.
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      11-12-2016, 01:30 PM   #8
chesticals
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OK cool, thanks. I'm heading out to take a look now
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      11-20-2016, 04:56 PM   #9
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Quote:
Originally Posted by chesticals View Post
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?
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      11-23-2016, 11:11 AM   #10
chesticals
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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
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Sooo

Did the new O2 fix your issue?
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      02-26-2019, 09:58 PM   #12
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Ok, so I figured out my issue. I smashed the Oxygen sensor wire between the intake manifold and head.
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      02-28-2019, 04:23 PM   #13
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Quote:
Originally Posted by Kadywampes View Post
Ok, so I figured out my issue. I smashed the Oxygen sensor wire between the intake manifold and head.
Ouch, that'll do it.
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