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Old 05-21-2009, 05:03 AM
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2006 E55 AMG
P2096 Code

I got this check engine light code:

P2096 Powertrain
Post Catalyst fuel trim too lean

I only have 200 cell race cats with no secondaries and a stock resonator in place. The race cats are positioned where the stock primaries were, any idea on what this code means? Lean is the word that catches my eye....
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Old 05-21-2009, 10:51 AM
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Gemballa 996tt
looked that code up in Alldata and got this
---------------------------------------------------------
P2096


N3/10 (ME-SFI Control Module), Internal Fault (P0105)

Check Component N3/10 (ME-SFI Control Module)

Possible cause and remedy


Control unit N3/10 (ME-SFI control module), internal fault
Replace component N3/10 (ME-SFI control module).
Note: Read coding and transfer to the new control unit.

** End of Test **
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Old 05-21-2009, 11:26 AM
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Maybe an o2 sensor?
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Old 05-21-2009, 02:31 PM
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2005 E55
Hey bassn_07...do you have Vadim's midsection pipe? I just received his midsection pipe with the HiFlow 200 cell cats also but haven't had the chance to install it yet.
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Old 05-21-2009, 04:12 PM
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Originally Posted by rberga1 View Post
Hey bassn_07...do you have Vadim's midsection pipe? I just received his midsection pipe with the HiFlow 200 cell cats also but haven't had the chance to install it yet.
Yep, installed and working great. I tried to get some solid results but track conditions didn't cooperate. I'll be back to the track soon to try again.
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Old 02-15-2011, 11:35 AM
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I got this code after I gutted my secondaries and installed my axel back today. It has been roughly 10 days since the modification but the CEL came on today, bassn_07, did you ever figure it out?
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Old 02-15-2011, 12:17 PM
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Originally Posted by chawkins2001 View Post
I got this code after I gutted my secondaries and installed my axel back today. It has been roughly 10 days since the modification but the CEL came on today, bassn_07, did you ever figure it out?
When I did headers and primary cat delete the car got leaner on the dyno.I never got a code but it got leaner a/f from the headers.

Try clearing it out and see if it adapts,I dont know if a regular scan tool will clear fuel trims but its worth a shot.

If the code comes back up its because you might be running to lean for the stock tuning,or to lean in general.
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Old 02-15-2011, 12:17 PM
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Originally Posted by skratch77 View Post
When I did headers and primary cat delete the car got leaner on the dyno.I never got a code but it got leaner a/f from the headers.

Try clearing it out and see if it adapts,I dont know if a regular scan tool will clear fuel trims but its worth a shot.

If the code comes back up its because you might be running to lean for the stock tuning,or to lean in general.
This cold weather wont help either since the car will lean out anyways.
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Old 02-15-2011, 12:18 PM
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you need a retune
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Old 02-15-2011, 12:23 PM
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Man, that is strange. All I did was gut the secondaries and installed my axel back, nothing else. Primaries are still there too. These cars come pig rich from the factory, so those two little mods caused this? That is interesting. Maybe the K&N's, scoops and cool air all contributed to the code too, who knows.

This was also pulled with the autozone scanner not a DAS, so maybe that code is generic.

Last edited by chawkins2001; 02-15-2011 at 12:25 PM.
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Old 02-15-2011, 12:28 PM
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clear the code and check your afr in 3rd gear at WOT you dont want to be lean and blow the motor
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Old 02-15-2011, 02:28 PM
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If he is running lean why is it only in one bank?
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Old 02-15-2011, 03:34 PM
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Originally Posted by Roverron View Post
If he is running lean why is it only in one bank?
This is a generic code for a lean af
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Old 02-16-2011, 10:11 AM
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CLS AMG 55
Well if he got the code from SDS it is pass side upper O2 delay time to long
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Old 02-16-2011, 10:17 AM
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it is from an autozone scanner
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Old 03-14-2011, 10:52 AM
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Alright guys I have tracked down the reason for this code kicking from the ecu. Yesterday I was moving my car back and forth on cold starts, as I was applying my AMG decals on my painted calipers between the spokes of the rim.

I had the CEL on before I started the process, but after several cold starts and shutting down, the computer cleared the code itself. I could not believe it. At that point I started running my TORQUE app to see if the code would kick back out, low and behold it did. I had my TQ app on the fuel tables, 4 tables/sesnors for bank 1, and 4 tables/sensors for bank 2.

All 8 fuel tables remained at 0 while the car was warming up but once it reached is normal temp, bank 1 table/sensor 2 and bank 2 table/sensor 2 spiked to 80 and the CEL was thrown while all other tables/sensors read 0.

That makes sense why the car cleared the code itself earlier because it was not in open loop, but still closed or cold and therefore bank 1 sensor 2 and bank 2 sensor 2 had not spiked. Why is it doing that? My car is on the stock tune, you think that EFI control module is bad per the P2096 code suggests?
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Old 03-14-2011, 12:39 PM
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yeah I just did a tune on mine and this code came up about 3 days after I picked the car up. Be interested in knowing the outcome is.
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Old 04-19-2012, 11:07 PM
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Bumping an old thread but did you guys ever figure this out?
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Old 04-19-2012, 11:21 PM
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Originally Posted by nanayaw6 View Post
Bumping an old thread but did you guys ever figure this out?
This worked for me:
Originally Posted by shardul View Post
you need a retune
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Old 04-20-2012, 12:22 PM
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When I had this code I got a retune as well and it fixed for me.
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