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Title: P1131 & P1113 Internal resistance too high - sporadic 8D0 907 551 K on D-Box Post by: M.Mischler on October 16, 2023, 06:15:33 AM Hello all
Intro I run a 8D0 907 551 K from RS4 B5 on a S4 B5 with D-Box. All hardware from the S4 B5 is stock except downpipes are without precatalyst only with main catalytic converter. Problem After a ride with some full throttle pulls, two errors are stored in the ECU. P1131 & P1113 Internal resistance too high - sporadic. Both error messages relate to the 1st O2 sensors (not to the 2nd O2 sensors). Details about changes I made I have executed the instructions according to S4wiki, which are listed in the chapters Rear O2 ESKONF (https://s4wiki.com/wiki/Tuning#Rear_O2_ESKONF) and Cat and O2 complete removal and DTCs (https://s4wiki.com/wiki/Tuning#Cat_and_O2_complete_removal_and_DTCs) with the exception of CWKONABG. I have set the value for CWKONABG to 1 rather than 0 so that the idle speed is increased at cold start. In detail I have changed the following: Code: ESKONF[1] from C0 to FC Code: ESKONF[3] from FC to FF Code: ESKONF[4] from 0C to 3C Code: ESKONF[5] from 00 to C0 Code: ESKONF[6] from F3 to FF Code: CDHSH from 1 to 0 Code: CDHSHE from 1 to 0 Code: CDLATV from 1 to 0 Code: CDLASH from 1 to 0 Code: CDLSH from 1 to 0 Code: CDLSHV from 1 to 0 Code: CWKONABG from 5 to 1 (not to 0!) Code: CWKONLS from 51 to 17 Question In my opinion, my changes have no relation to the two error codes P1131 & P1113 for the relate to the 1st O2 sensors. And it is unlikely that both sensors will break at the same time. So my question: is there a threeshold that needs to be adjusted for the O2 sensors in the K-Box file because the O2 sensors from the S4 B5 are used instead of those from the RS4 B5? Title: Re: P1131 & P1113 Internal resistance too high - sporadic 8D0 907 551 K on D-Box Post by: M.Mischler on October 16, 2023, 06:34:23 AM For your information: I have already read the following forum posts in which the text P1131 appears (but without any new knowledge regarding my problem):
P1131 Internal resistance too high - sporadic. 4B0 907 551M (http://nefariousmotorsports.com/forum/index.php?topic=16111.0) Sensor Removal and DTC Cel Flags (http://nefariousmotorsports.com/forum/index.php?topic=60.0) SAI/MSLUB (https://nefariousmotorsports.com/forum/index.php?topic=6864.0) Title: Re: P1131 & P1113 Internal resistance too high - sporadic 8D0 907 551 K on D-Box Post by: prj on October 16, 2023, 06:56:23 AM Your front sensors are bad.
Possibly they were damaged when removing the pre-cats. Replace both front sensors. If problem persists, start searching for bad grounds. Title: Re: P1131 & P1113 Internal resistance too high - sporadic 8D0 907 551 K on D-Box Post by: M.Mischler on October 16, 2023, 07:06:40 AM Replace both front sensors. If problem persists, start searching for bad grounds. Hi prj OK, thanks for your information. I will follow your advice. Title: Re: P1131 & P1113 Internal resistance too high - sporadic 8D0 907 551 K on D-Box Post by: IamwhoIam on October 17, 2023, 07:52:59 AM Hello all Intro I run a 8D0 907 551 K from RS4 B5 on a S4 B5 with D-Box. All hardware from the S4 B5 is stock except downpipes are without precatalyst only with main catalytic converter. blah blah blah yadda yadda yadda Why you would run 551K RS4 software in an otherwise near TOTALLY STOCK S4 is beyond me. Cams/heads don't match, CR doesn't match, intake manifold model doesn't match, inlets and turbos don't match, injectors don't match. You'd be FAR better off putting a map pack together for your D box and tuning that rather than trying to reinvent the wheel on software that was intended for a totally different engine. Just my 0.02 worth of over 1000 S4s and 500 RS4s tuned in my life. Title: Re: P1131 & P1113 Internal resistance too high - sporadic 8D0 907 551 K on D-Box Post by: prj on October 17, 2023, 08:29:42 AM Even just running 551G with Bosch sensor conversion is better.
There's full A2L for that. Title: Re: P1131 & P1113 Internal resistance too high - sporadic 8D0 907 551 K on D-Box Post by: M.Mischler on October 18, 2023, 01:40:57 AM Why you would run 551K RS4 software in an otherwise near TOTALLY STOCK S4 is beyond me. Cams/heads don't match, CR doesn't match, intake manifold model doesn't match, inlets and turbos don't match, injectors don't match. You'd be FAR better off putting a map pack together for your D box and tuning that rather than trying to reinvent the wheel on software that was intended for a totally different engine. Just my 0.02 worth of over 1000 S4s and 500 RS4s tuned in my life. Hi IamwhoIam Thank you for asking. :) I have already tuned the vehicle with a D-Box software. The reasons why I now use a K-Box software for the D-Box from the S4 B5 are the following: 1. I want to get to know the ME7.1 even better. If I use a K-Box software on a S4 B5, I have to adjust much more than it is the case with a D-Box software. This way I get to know the ME7.1 better and I find my knowledge gaps. 2. I still have a RS4 B5. Tuning an RS4 B5 with a aftermarket ECU is no problem for me. I have implemented a polyoctane software with flexfuel capability from scratch (with all stuff, handle coldstart and hotstart issues and so on...). But I am still far from being able to do this with a ME7.1. My goal is to increase step by step my knowledge that I can tune my RS4 B5 also with a ME7.1. Tuning a S4 B5 with K-Box software is one of my steps to achieve my goal. |