OBD Code P-2098
Thread Starter
Senior Member
Joined: Oct 2011
Posts: 419
Likes: 3
From: Southern Maryland USA
06 E55 AMG, 13 C63 AMG
OBD Code P-2098
2006 E55
Eurocharged Stage 3
MBH headers and mid pipe.
Every time I drive the vehicle I get this code.
What I am looking for is information on the ECU strategy/monitor that is used for this code. Basically what the ECU is looking for that causes this code to be set.
I have full access to Toyota/Lexus data and have been able to solve these problems on modified vehicles, but I cannot find the info on Mercedes for this code.
Do any of you have access to the Mercedes FSM and the diagnostic info for this code that can post it or email it to me?
Thanks!!
G
Eurocharged Stage 3
MBH headers and mid pipe.
Every time I drive the vehicle I get this code.
What I am looking for is information on the ECU strategy/monitor that is used for this code. Basically what the ECU is looking for that causes this code to be set.
I have full access to Toyota/Lexus data and have been able to solve these problems on modified vehicles, but I cannot find the info on Mercedes for this code.
Do any of you have access to the Mercedes FSM and the diagnostic info for this code that can post it or email it to me?
Thanks!!
G
Thread Starter
Senior Member
Joined: Oct 2011
Posts: 419
Likes: 3
From: Southern Maryland USA
06 E55 AMG, 13 C63 AMG
It is not a code for not having a cats installed, it is something else.
I cannot find any info on the monitor for that code so I have no idea what the monitor is looking for.
When you say turn off the rear O2s, is that for removing the cats or specific to this code. If it is for that code, how are the rear O2s turned off?
G
I cannot find any info on the monitor for that code so I have no idea what the monitor is looking for.
When you say turn off the rear O2s, is that for removing the cats or specific to this code. If it is for that code, how are the rear O2s turned off?
G
MBWorld Fanatic!
Joined: Jan 2011
Posts: 1,239
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From: West
E55 AMG
After I installed my MBH headers I was getting this code as well. Per Jerry's advice I replaced the rear O2 sensors, checked for exhaust and vacuum leaks, and installed the 90 extenders. On my car, none of this worked until Jerry re-flashed the car. Monitoring of the rear O2's had been turned off previous to installing the headers, and I did not have any CEL issues until the headers were installed and rear O2 sensors were extended.
I don't believe the extension of the O2 sensors caused the issue, considering that once the car was retuned, everything was fine, and yes I replaced the rear O2's with Bosch Universals and had the silver core leads soldered.
Since then I've had Jeremy tune the car, and no issues either. I believe this may have to do with the ECU's ability to trim LTFT's. Once the tune is changed to compensate for the headers the CEL's went away.
Check out this thread: https://mbworld.org/forums/w211-amg/...2098-code.html
I don't believe the extension of the O2 sensors caused the issue, considering that once the car was retuned, everything was fine, and yes I replaced the rear O2's with Bosch Universals and had the silver core leads soldered.
Since then I've had Jeremy tune the car, and no issues either. I believe this may have to do with the ECU's ability to trim LTFT's. Once the tune is changed to compensate for the headers the CEL's went away.
Check out this thread: https://mbworld.org/forums/w211-amg/...2098-code.html
Last edited by jmb614; May 3, 2012 at 10:18 AM.
MBWorld Fanatic!
Joined: Jan 2009
Posts: 3,182
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From: Northern VA
W211
any chance the rear o2s were swapped? Some guys got this code after adding headers where o2s were put in incorrectly. When i had my mbh installed, i had the extenders as well and ran without any CEL codes. Then got OE to tune the car for headers, pulley and believe he turned the rear o2s off. Since i went to advance auto and got a code reader and said o2 readiness 'not ready' monitor.
"i had this problem after getting long tubes installed and it turned out that the shop installed the upstream and downstream sensors in reverse... once i swapped positions the codes went away and have been gone since." from a response on the thread linked above.
"i had this problem after getting long tubes installed and it turned out that the shop installed the upstream and downstream sensors in reverse... once i swapped positions the codes went away and have been gone since." from a response on the thread linked above.
Last edited by novae500; May 3, 2012 at 10:21 AM.
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Super Member
Joined: Mar 2011
Posts: 502
Likes: 0
From: Porter Ranch, CA
E55, CTS-V Wagon, Duc 1098R
Gadget - Check my photo album since I uploaded pics of the STAR DAS screens for P2098.
https://mbworld.org/forums/members/a...r-screens.html
Peter - If your code came from an E63, it will be different. The OBD versions are slightly different from the E55.
https://mbworld.org/forums/members/a...r-screens.html
Peter - If your code came from an E63, it will be different. The OBD versions are slightly different from the E55.
Thread Starter
Senior Member
Joined: Oct 2011
Posts: 419
Likes: 3
From: Southern Maryland USA
06 E55 AMG, 13 C63 AMG
I think it is clearing up a little bit.
If you look at the description in the header for that code,
Aging correction variable exceeded. Delay time too long
What that may be saying is that there is an excessive transient delay from the time the ECU makes a correction to the A/F ratio and the time it is read by the O2 sensor. With the long tube headers moving the O2 sensor further from the engine the transient delay in the response will increase and it maybe to much delayed and the ECU has diagnosed a fault.
If that is the case, it is the long tube headers causing the the problem and not the calibration. The O2 sensor will need to be moved closer to the engine to reduce the transient response time.
Is there a way to alter the acceptable transient time by altering the code in the ECU?
Do other folks with aftermarket ECU calibrations from other tuners have this on going P-2098 problem?
G
If you look at the description in the header for that code,
Aging correction variable exceeded. Delay time too long
What that may be saying is that there is an excessive transient delay from the time the ECU makes a correction to the A/F ratio and the time it is read by the O2 sensor. With the long tube headers moving the O2 sensor further from the engine the transient delay in the response will increase and it maybe to much delayed and the ECU has diagnosed a fault.
If that is the case, it is the long tube headers causing the the problem and not the calibration. The O2 sensor will need to be moved closer to the engine to reduce the transient response time.
Is there a way to alter the acceptable transient time by altering the code in the ECU?
Do other folks with aftermarket ECU calibrations from other tuners have this on going P-2098 problem?
G
MBWorld Fanatic!
Joined: Jan 2011
Posts: 1,239
Likes: 17
From: West
E55 AMG
Thanks for posting that Adianaty! Sounds like that could also be a failing primary O2 sensor? Reason I ask is because a few months after those codes appeared and were cleared, I needed to replace the primary O2's.
It would be interesting to see if moving the sensors closer would help.
It would be interesting to see if moving the sensors closer would help.
Super Member
Joined: Mar 2011
Posts: 502
Likes: 0
From: Porter Ranch, CA
E55, CTS-V Wagon, Duc 1098R
I don't think it's the length per se. It's more likely to be a leak. The difference in location is maybe 12" and I would think the gases would travel that far after one compression cycle which would be as fast as the ECU could change AFR effectively.
Also I have brand new O2's and still got the code.
Also I have brand new O2's and still got the code.
Last edited by adianaty; May 3, 2012 at 05:55 PM.
MBWorld Fanatic!
Joined: Jan 2011
Posts: 1,239
Likes: 17
From: West
E55 AMG
Are you running MBH LTH's as well?
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Joined: Jun 2007
Posts: 1,856
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From: Socal
07E63, 12E350, 08997TT, 16SiennaSE
I can smell unburn fuel at start up.
Junior Member
Joined: Nov 2016
Posts: 59
Likes: 4
Mercedes Benz E55 AMG
I think it is clearing up a little bit.
If you look at the description in the header for that code,
Aging correction variable exceeded. Delay time too long
What that may be saying is that there is an excessive transient delay from the time the ECU makes a correction to the A/F ratio and the time it is read by the O2 sensor. With the long tube headers moving the O2 sensor further from the engine the transient delay in the response will increase and it maybe to much delayed and the ECU has diagnosed a fault.
If that is the case, it is the long tube headers causing the the problem and not the calibration. The O2 sensor will need to be moved closer to the engine to reduce the transient response time.
Is there a way to alter the acceptable transient time by altering the code in the ECU?
Do other folks with aftermarket ECU calibrations from other tuners have this on going P-2098 problem?
G
If you look at the description in the header for that code,
Aging correction variable exceeded. Delay time too long
What that may be saying is that there is an excessive transient delay from the time the ECU makes a correction to the A/F ratio and the time it is read by the O2 sensor. With the long tube headers moving the O2 sensor further from the engine the transient delay in the response will increase and it maybe to much delayed and the ECU has diagnosed a fault.
If that is the case, it is the long tube headers causing the the problem and not the calibration. The O2 sensor will need to be moved closer to the engine to reduce the transient response time.
Is there a way to alter the acceptable transient time by altering the code in the ECU?
Do other folks with aftermarket ECU calibrations from other tuners have this on going P-2098 problem?
G
