Audi A8 D2 - 18265 - Load Signal - P1857 - 35-00 - Error Message from ECU

steamship · Oct 16, 2014

Having an issue with my 3.7 petrol/LPG Audi A8. I've included a full scan, and I'm aware of the other issues, but there is one error in particular that I would like to address. That is the '18265 Load Signal' error I'm getting in modules 02 (Trans) and 03 (ABS). Another symptom I'm getting is that the ABS and ESP lights coming on, and the transmission giving a small 'thump' when put into drive. If I clear the codes, the lights go off, and it won't 'thump' going into drive.

I've searched the forum, and although I can find a few scans with the 18265 code in them, that code is never talked about. A Google search has returned a few interesting ones common to some VAG cars, that being a broken wire on the alternator sense cable. Anyone familiar with that, and could this be a possibility with the A8?

Things I've changed over the last few months - all vacuum pipes, fuel pressure regulator, crankcase breather valve, MAF, cleaned all ABS sensors, brake switch. I have also used ELSA to run tests on the ABS sensors, MAF sensor and O2 sensors (the B1S1 comes and goes), and also checked voltages.

Would it be possible to connect a new sensor up to the car, but not install it, just to see if that sorts the 01 (Engine) codes out, as the ABS and ESP lights come on after about 3 miles? If it does. then I can attempt to install it properly?

Finally (for now anyway), what (and how) could I log in real-time for those 3 odd miles until the ABS and ESP lights come on, so that I can try and track down the culprit?

Thanks.

Code:

Tuesday,14,October,2014,16:31:59:42449
VCDS -- Windows Based VAG/VAS Emulator
VCDS Version: 12.12.3.0 (x64)
Data version: 20140905


VIN: WAUZZZ4D92N002072   License Plate: LV51MWJ
Mileage: 67820   Repair Order: VCDScable



--------------------------------------------------------------------------------
--------------------------------------------------------------------------------


Chassis Type: 4D (4D - Audi A8 D2 (1994 > 2003))
Scan: 25 01 03 08 11 15 16 17 18 35 37 45 55 56 57 65 67 75 76 77
          02
 
VIN: WAUZZZ4D92N002072   
-------------------------------------------------------------------------------
Address 01: Engine        Labels: Redir Fail!
   Part No: 4D0 907 558 AB
   Component: 3.7L V8/5V      G   0002  
   Coding: 11753
   Shop #: WSC 23143  
   VCID: 6DD640B227342F7640B-5160
   WAUZZZ4D92N002072     AUZ7Z0A1855153

6 Faults Found:
17521 - Oxygen (Lambda) Sensor; B1 S1 
            P1113 - 35-10 - Internal Resistance too High - Intermittent
17536 - Fuel Trim; Bank 1 (Mult) 
            P1128 - 35-10 - System too Lean - Intermittent
17537 - Fuel Trim; Bank 2 (Mult) 
            P1129 - 35-10 - System too Rich - Intermittent
16485 - Mass Air Flow Sensor (G70) 
            P0101 - 35-00 - Implausible Signal
17545 - Fuel Trim: Bank 1 (Add) 
            P1137 - 35-00 - System too Rich
17547 - Fuel Trim: Bank 2 (Add) 
            P1139 - 35-00 - System too Rich
Readiness: 0010 1101

-------------------------------------------------------------------------------
Address 03: ABS Brakes        Labels: 8D0-907-389.lbl
   Part No: 4D0 907 389 E
   Component: ABS/ESP allrad      D56  
   Coding: 08397
   Shop #: WSC 02313  
   VCID: 316E9CC2FB8C8B96243-5160

1 Fault Found:
18265 - Load Signal 
            P1857 - 35-00 - Error Message from ECU

-------------------------------------------------------------------------------
Address 08: Auto HVAC        Labels: 4D0-820-043-MYX.lbl
   Part No: 4D0 820 043 P
   Component: A8-Klimavollautomat D11  
   Coding: 00081
   Shop #: WSC 00315  
   VCID: 295E74A2D35CF356EC3-2590

No fault code found.

-------------------------------------------------------------------------------
Address 15: Airbags        Labels: 4D0-959-655-AI8.lbl
   Part No: 4D0 959 655 T
   Component: Airbag Front+Kopf  5001  
   Coding: 01417
   Shop #: WSC 02335  
   VCID: 4382C60A51300906C6F-5160

No fault code found.

-------------------------------------------------------------------------------
Address 17: Instruments        Labels: 4D0-919-033-MYX.lbl
   Part No: 4D0 919 035 AQ
   Component: KOMBI+WEGFAHRS.VDO D37   
   Coding: 16483
   Shop #: WSC 00209  
   VCID: 75E668D24F64E7B6B8B-5160
   WAUZZZ4D92N002072     AUZ7Z0A1855153

No fault code found.

-------------------------------------------------------------------------------
Address 35: Centr. Locks        Labels: 8D0-862-257.lbl
   Part No: 8L0 862 257 P
   Component: CV-Pump, Alarm, RC  D17  
   Coding: 16203
   Shop #: WSC 00315  
   VCID: 428CC30E4E2A000ECD9-4EEC

1 Fault Found:
01134 - Alarm Horn (H12) 
            77-00 - Internal Supply Voltage

-------------------------------------------------------------------------------
Address 37: Navigation        Labels: 4B0-035-192-RNSD-37.lbl
   Part No: 4D0 035 192 N
   Component: RNS 4.1 H05    BNO 0140  
   VCID: 2A5C8BAED65AF84EE59-4B06

No fault code found.

-------------------------------------------------------------------------------
Address 45: Inter. Monitor        Labels: 4B0-951-178.lbl
   Part No: 4D0 951 177 B
   Component: Innenraumueberw.    D06  
   Coding: 00001
   Shop #: WSC 00000  
   VCID: 285871A6C856CA5EF3D-5142

No fault code found.

-------------------------------------------------------------------------------
Address 56: Radio        Labels: 4B0-035-192-RNSD-56.lbl
   Part No: 4D0 035 192 N
   Component: Radio          BNO 0001  
   Coding: 00205
   Shop #: WSC 02314  
   VCID: 2A5C8BAED65AF84EE59-4B06

No fault code found.

-------------------------------------------------------------------------------
Address 57: TV Tuner        Labels: 4D0-919-146.clb
   Part No: 4D0 919 146 B
   Component: TV Tuner        H06 0704  
   Coding: 0000030
   Shop #: WSC 00000 000 00000
   VCID: 285871A69856CA5EF3D-5160

No fault code found.

-------------------------------------------------------------------------------
Address 76: Park Assist        Labels: 4D0-919-283.lbl
   Part No: 4D0 919 283 
   Component: Parkingsystem A8 RDW D07  
   Coding: 01108
   Shop #: WSC 00209  
   VCID: E8D8B1A688D68A5EB3D-519A

No fault code found.

-------------------------------------------------------------------------------
Address 02: Auto Trans        Labels: 01V-927-156.lbl
   Part No: 4D0 927 156 DT
   Component: AG5 01V 3.7l5V  RdW 1920  
   Coding: 00111
   Shop #: WSC 00000  
   VCID: 7EF477FE7A52A4EEE91-5160

1 Fault Found:
18265 - Load Signal 
            P1857 - 35-00 - Error Message from ECU

End   ---------------------------------------------------------------------

Uwe · Oct 16, 2014

Load Signal error is most likely due to the issues your ECU is having with the MAF. You say you've changed it, yet the ECU still isn't happy with it. Where did the replacement MAF come from? Have you logged what the ECU is seeing from that MAF? See also:

http://wiki.ross-tech.com/wiki/index.php/Fuel_Trim_Info

-Uwe-

jyoung8607 · Oct 16, 2014

Thank you for the clear problem description and the Auto-Scan!

Most of your complaints probably trace back to this:

Code:

Address 01: Engine        Labels: Redir Fail!
   Part No: 4D0 907 558 AB
   Component: 3.7L V8/5V      G   0002  
   Coding: 11753
   Shop #: WSC 23143  
   VCID: 6DD640B227342F7640B-5160
   WAUZZZ4D92N002072     AUZ7Z0A1855153

...

16485 - Mass Air Flow Sensor (G70) 
            P0101 - 35-00 - Implausible Signal

...

The ECU is getting a series of inputs that can't be reconciled with each other, and for reasons not yet clear, it's declaring your MAF sensor as one of the bogus components. It could be an actual failed MAF sensor, or it could be air leaks, or other things. Your B1 S1 heater circuit problem is a definite electrical issue and should be looked at, and it would be one of the things MAF input is reconciled against, so I would try resolving that first.

Your load signal errors are due to the MAF being failed-out by the ECU. Airflow through the engine (load) is used to calculate how much torque the engine is making at any given moment, and that value is shared via CAN with the transmission and ABS/ESP controllers, so they can do their respective jobs better. If the MAF is declared failed, the ECU can't send out that load signal, and you'll see those load signal missing DTCs. As a result, you may see harsh worst-case/safe shifting behavior, and no stability control available. When you get your ECU to stop failing-out the MAF, you won't have any more load signal DTCs.

I can't help but think your LPG retrofit is involved. Is it recent?

Jason

Jack@European_Parts · Oct 16, 2014

17521 - Oxygen (Lambda) Sensor; B1 S1
P1113 - 35-10 - Internal Resistance too High - Intermittent <<<<<<<<<<<<<<<<<<<< This can also cause a swing since the sensor itself is bad internally but could be induced from running lean Multipcative from Additive RICH to Mult also RICH from incorrect or faulty MAF or air leak for retrofit/otherwise elsewhere.

steamship · Oct 16, 2014

Uwe said:
Load Signal error is most likely due to the issues your ECU is having with the MAF. You say you've changed it, yet the ECU still isn't happy with it. Where did the replacement MAF come from? Have you logged what the ECU is seeing from that MAF? See also:

http://wiki.ross-tech.com/wiki/index.php/Fuel_Trim_Info

-Uwe-

Purchased the MAF from EuroCarParts here in the UK, using the part number on the original. Came across that link from another post and found is hard going. Watched the video at the bottom of that page, and just tried those measuring blocks on mines, but they're not showing the same. Only got the cable, so not familiar enough with all I can do with it. How would I "log what the ECU is seeing from that MAF"? I've checked the MAF using ELSA instructions and the relevant measuring blocks, and the values are within the ranges quoted.

jyoung8607 said:
Thank you for the clear problem description and the Auto-Scan!

Most of your complaints probably trace back to this:

Code:

Address 01: Engine Labels: Redir Fail! Part No: 4D0 907 558 AB Component: 3.7L V8/5V G 0002 Coding: 11753 Shop #: WSC 23143 VCID: 6DD640B227342F7640B-5160 WAUZZZ4D92N002072 AUZ7Z0A1855153 ... 16485 - Mass Air Flow Sensor (G70) P0101 - 35-00 - Implausible Signal ...

The ECU is getting a series of inputs that can't be reconciled with each other, and for reasons not yet clear, it's declaring your MAF sensor as one of the bogus components. It could be an actual failed MAF sensor, or it could be air leaks, or other things. Your B1 S1 heater circuit problem is a definite electrical issue and should be looked at, and it would be one of the things MAF input is reconciled against, so I would try resolving that first.

Your load signal errors are due to the MAF being failed-out by the ECU. Airflow through the engine (load) is used to calculate how much torque the engine is making at any given moment, and that value is shared via CAN with the transmission and ABS/ESP controllers, so they can do their respective jobs better. If the MAF is declared failed, the ECU can't send out that load signal, and you'll see those load signal missing DTCs. As a result, you may see harsh worst-case/safe shifting behavior, and no stability control available. When you get your ECU to stop failing-out the MAF, you won't have any more load signal DTCs.

I can't help but think your LPG retrofit is involved. Is it recent?

Jason

The LPG was fitted a year ago. I've had different MAF codes previously, which is the annoying thing, in that the errors appear to be random. I've also had the MAF error 16486 - Mass Air Flow Sensor about a month ago, since it was replaced in April. I've been using a cheap Chinese clone of Super VAG K+CAN code reader. From what I've written down from the past, scans in April and May showed no MAF errors.

Forgot to say in my original post that I did checks for vacuum leaks after replacing all the vacuum hoses.

Will be really annoyed if it is the MAF sensor again, since the original one lasted 12 years and this one has lasted one.

Bruce · Oct 16, 2014

How would I "log what the ECU is seeing from that MAF"?

We wrote an article: Diagnosing a VW/Audi MAF Failure

The Mass Airflow sensor output is often found in Measuring Value group 002. To log information, consult our fine manual:

http://www.ross-tech.com/vcds/tour/logging.html

Note, the opening screen shows the MAF output in group 002 - block 4.

steamship · Oct 18, 2014

Bruce said:
We wrote an article: Diagnosing a VW/Audi MAF Failure

The Mass Airflow sensor output is often found in Measuring Value group 002. To log information, consult our fine manual:

http://www.ross-tech.com/vcds/tour/logging.html

Note, the opening screen shows the MAF output in group 002 - block 4.

Cheers Bruce. I've read through both articles, but not had a chance to do them. My engine doesn't have a label file associated it, so I followed the instructions on generating one (see below - I've taken the liberty of shortening it by removing repeated blocks that were empty):

Code:

;SW:4D0-907-558-AB   HW: ---  Engine
;Component:3.7L V8/5V      G   0002, Coding:11753
;Thursday,16,October,2014,20:37:00:42449
;VCDS Version: Release 12.12.3 (x64)  Data version: 20140905
;VCID: 6DD640B227342F7640B-5160

Group,Field 1,Data type,Field 2,Data type,Field 3,Data type,Field 4,Data type,
1,720 /min,RPM,48.0°C,Temperature,0.0 %,Lambda,0.0 %,Lambda,
2,680 /min,RPM,28.6 %,Load,3.64 ms,Inj. On Time,4.53 g/s,Mass Flow,
3,720 /min,RPM,4.53 g/s,Mass Flow,2.4 %,Load,9.0 °BTDC,Ign. Timing,
4,720 /min,RPM,13.860 V,Voltage,48.0°C,Temperature,30.0°C,Temperature,
5,720 /min,RPM,28.6 %,Load,0.0 km/h,Speed,Idle, ,
6,720 /min,RPM,28.6 %,Load,30.0°C,Temperature,-3.1 %,Lambda,
7,        ,Bin. Bits,        ,Bin. Bits,        ,Bin. Bits,        ,Bin. Bits,
9,        ,Bin. Bits,        ,Bin. Bits,        ,Bin. Bits,        ,Bin. Bits,
10,720 /min,RPM,28.6 %,Load,2.4 %,Load,9.8 °BTDC,Ign. Timing,
11,720 /min,RPM,48.0°C,Temperature,30.0°C,Temperature,10.5 °BTDC,Ign. Timing,
12,        ,Bin. Bits,        ,Bin. Bits,        ,Bin. Bits,        ,Bin. Bits,
13,        ,Bin. Bits,        ,Bin. Bits,        ,Bin. Bits,        ,Bin. Bits,
14,720 /min,RPM,28.6 %,Load,0,Count,Enabled, ,
15,0,Count,0,Count,0,Count,Enabled, ,
16,0,Count,0,Count,0,Count,Enabled, ,
17,0,Count,0,Count,        ,Bin. Bits,Enabled, ,
18,0 /min,RPM,0 /min,RPM,0.0 %,Load,0.0 %,Load,
19,        ,Bin. Bits,        ,Bin. Bits,        ,Bin. Bits,        ,Bin. Bits,
20,0.0°KW,Idle Stabilization,0.0°KW,Idle Stabilization,0.0°KW,Idle Stabilization,0.0°KW,Idle Stabilization,
21,0.0°KW,Idle Stabilization,0.0°KW,Idle Stabilization,0.0°KW,Idle Stabilization,0.0°KW,Idle Stabilization,
22,720 /min,RPM,27.8 %,Load,0.0°KW,Idle Stabilization,0.0°KW,Idle Stabilization,
23,720 /min,RPM,27.8 %,Load,0.0°KW,Idle Stabilization,0.0°KW,Idle Stabilization,
24,720 /min,RPM,27.8 %,Load,0.0°KW,Idle Stabilization,0.0°KW,Idle Stabilization,
25,680 /min,RPM,27.8 %,Load,0.0°KW,Idle Stabilization,0.0°KW,Idle Stabilization,
26,1.053 V,Voltage,0.936 V,Voltage,1.170 V,Voltage,0.936 V,Voltage,
27,1.638 V,Voltage,2.340 V,Voltage,0.936 V,Voltage,1.053 V,Voltage,
28,680 /min,RPM,27.8 %,Load,49.0°C,Temperature,Test OFF, ,
29,        ,Bin. Bits,        ,Bin. Bits,        ,Bin. Bits,        ,Bin. Bits,
30,     110,Bin. Bits,     000,Bin. Bits,     110,Bin. Bits,     000,Bin. Bits,
31,0.780 V,Voltage,0.440 V,Voltage,0.805 V,Voltage,0.455 V,Voltage,
32,-5.8 %,Lambda,-10.2 %,Lambda,-5.4 %,Lambda,-12.5 %,Lambda,
33,0.0 %,Lambda,0.780 V,Voltage,0.0 %,Lambda,0.800 V,Voltage,
34,680 /min,RPM,380.0°C,Temperature,0.32 s,Time,Test OFF, ,
35,680 /min,RPM,380.0°C,Temperature,0.32 s,Time,Test OFF, ,
36,0.440 V,Voltage,Test OFF, ,0.455 V,Voltage,Test OFF, ,
37,28.6 %,Load,0.435 V,Voltage,20.0 ms,Time Corr.,Test OFF, ,
38,27.8 %,Load,0.460 V,Voltage,30.0 ms,Time Corr.,Test OFF, ,
39,4.33 g/s,Mass Flow,0.440 V,Voltage,0.455 V,Voltage,System OK, ,
40,        ,Bin. Bits,        ,Bin. Bits,        ,Bin. Bits,        ,Bin. Bits,
41, , ,Htg. S1 ON, , , ,Htg. S2 ON, ,
42, , ,Htg. S1 ON, , , ,Htg. S2 OFF, ,
43,680 /min,RPM,15.0°C,Temperature,0.440 V,Voltage,B1-S2 OK, ,
44,680 /min,RPM,15.0°C,Temperature,0.460 V,Voltage,B2-S2 OK, ,
45,        ,Bin. Bits,        ,Bin. Bits,        ,Bin. Bits,        ,Bin. Bits,
46,680 /min,RPM,15.0°C,Temperature,0.18,(no units),Test OFF, ,
47,680 /min,RPM,15.0°C,Temperature,0.18,(no units),Test OFF, ,
48,        ,Bin. Bits,        ,Bin. Bits,        ,Bin. Bits,        ,Bin. Bits,
49,        ,Bin. Bits,        ,Bin. Bits,        ,Bin. Bits,        ,Bin. Bits,
50,710 /min,RPM,720 /min,RPM,A/C-Low, ,Compr.OFF, ,
51,710 /min,RPM,720 /min,RPM,0,Count,13.860 V,Voltage,
52,        ,Bin. Bits,        ,Bin. Bits,        ,Bin. Bits,        ,Bin. Bits,
53,700 /min,RPM,720 /min,RPM,13.860 V,Voltage,0.0 %,Load,
54,710 /min,RPM,Idle, ,0.0 %,Load,2.4 %,Load,
55,710 /min,RPM,2.0 %,Lambda,3.7 %,Lambda,   00000,Bin. Bits,
56,700 /min,RPM,720 /min,RPM,2.0 %,Lambda,   00000,Bin. Bits,
57,        ,Bin. Bits,        ,Bin. Bits,        ,Bin. Bits,        ,Bin. Bits,
58,680 /min,RPM,28.6 %,Load,OFF, ,OFF, ,
59,        ,Bin. Bits,        ,Bin. Bits,        ,Bin. Bits,        ,Bin. Bits,
60,13.7 %,Duty Cycle,85.9 %,Duty Cycle,0,Count,ADP. O.K., ,
61,680 /min,RPM,13.860 V,Voltage,2.4 %,Load,   00000,Bin. Bits,
62,13.7 %,Duty Cycle,85.9 %,Duty Cycle,14.1 %,Duty Cycle,6.6 %,Duty Cycle,
63,        ,Bin. Bits,        ,Bin. Bits,        ,Bin. Bits,        ,Bin. Bits,
64,0.600 V,Voltage,4.500 V,Voltage,0.800 V,Voltage,4.300 V,Voltage,
65,        ,Bin. Bits,        ,Bin. Bits,        ,Bin. Bits,        ,Bin. Bits,
66,0.0 km/h,Speed,00001010,Bin. Bits,0.0 km/h,Speed,00000000,Bin. Bits,
67,        ,Bin. Bits,        ,Bin. Bits,        ,Bin. Bits,        ,Bin. Bits,
68,        ,Bin. Bits,        ,Bin. Bits,        ,Bin. Bits,        ,Bin. Bits,
69,        ,Bin. Bits,        ,Bin. Bits,        ,Bin. Bits,        ,Bin. Bits,
70,0.0 %,Load,0.0 %,Lambda,0.0 %,Load,Test OFF, ,
71,        ,Bin. Bits,        ,Bin. Bits,        ,Bin. Bits,        ,Bin. Bits,
76,        ,Bin. Bits,        ,Bin. Bits,        ,Bin. Bits,        ,Bin. Bits,
77,680 /min,RPM,4.50 g/s,Mass Flow,0.0 %,Lambda,Abort, ,
78,680 /min,RPM,4.47 g/s,Mass Flow,0.0 %,Lambda,Abort, ,
79,        ,Bin. Bits,        ,Bin. Bits,        ,Bin. Bits,        ,Bin. Bits,
80,        ,Bin. Bits,        ,Bin. Bits,        ,Bin. Bits,        ,Bin. Bits,
81,WAUZZZ4D92N002072 AUZ7Z0A1855153   <>   ,Bin. Bits,
82,0000000000000    <>    <>  <> <>  <>,Bin. Bits,
83,        ,Bin. Bits,        ,Bin. Bits,        ,Bin. Bits,        ,Bin. Bits,
85,        ,Bin. Bits,        ,Bin. Bits,        ,Bin. Bits,        ,Bin. Bits,
86,00101101,Bin. Bits,11111011,Bin. Bits,01110111,Bin. Bits,00010111,Bin. Bits,
87,00101101,Bin. Bits,00000000,Bin. Bits,00000000,Bin. Bits,00000000,Bin. Bits,
88,11111100,Bin. Bits,10101001,Bin. Bits,11000000,Bin. Bits,        ,Bin. Bits,
89,0,Count,OK, ,        ,Bin. Bits,        ,Bin. Bits,
90,680 /min,RPM,OFF, ,-3.0°KW,Idle Stabilization,1.0°KW,Idle Stabilization,
91,680 /min,RPM,27.8 %,Load,OFF, ,-3.0°KW,Idle Stabilization,
92,680 /min,RPM,27.8 %,Load,OFF, ,0.0°KW,Idle Stabilization,
93,680 /min,RPM,27.8 %,Load,0.0°KW,Idle Stabilization,0.0°KW,Idle Stabilization,
94,680 /min,RPM,OFF, ,Test OFF, ,Test OFF, ,
95,680 /min,RPM,27.8 %,Load,52.0°C,Temperature,IMC-V OFF, ,
96,        ,Bin. Bits,        ,Bin. Bits,        ,Bin. Bits,        ,Bin. Bits,
98,        ,Bin. Bits,        ,Bin. Bits,        ,Bin. Bits,        ,Bin. Bits,
99,680 /min,RPM,53.0°C,Temperature,-7.0 %,Lambda,O2-Reg.ON, ,
100,00101101,Bin. Bits,53.0°C,Temperature,66.85 s,Time,11010000,Bin. Bits,
101,680 /min,RPM,27.8 %,Load,3.12 ms,Inj. On Time,4.33 g/s,Mass Flow,
102,680 /min,RPM,53.0°C,Temperature,30.0°C,Temperature,3.12 ms,Inj. On Time,
103,        ,Bin. Bits,        ,Bin. Bits,        ,Bin. Bits,        ,Bin. Bits,
104,44.0°C,Temperature,9.4 %,Lambda,4.7 %,Lambda,1.6 %,Lambda,
105,        ,Bin. Bits,        ,Bin. Bits,        ,Bin. Bits,        ,Bin. Bits,
106,        ,Bin. Bits,        ,Bin. Bits,        ,Bin. Bits,        ,Bin. Bits,
107,680 /min,RPM,-6.3 %,Lambda,-4.7 %,Lambda,Test OFF, ,
108,        ,Bin. Bits,        ,Bin. Bits,        ,Bin. Bits,        ,Bin. Bits,
109,        ,Bin. Bits,        ,Bin. Bits,        ,Bin. Bits,        ,Bin. Bits,
110,680 /min,RPM,53.0°C,Temperature,3.12 ms,Inj. On Time,2.4 %,Load,
111,        ,Bin. Bits,        ,Bin. Bits,        ,Bin. Bits,        ,Bin. Bits,
112,        ,Bin. Bits,        ,Bin. Bits,        ,Bin. Bits,        ,Bin. Bits,
113,680 /min,RPM,27.8 %,Load,2.4 %,Load,990.0 mbar,Absolute Pres.,
114,        ,Bin. Bits,        ,Bin. Bits,        ,Bin. Bits,        ,Bin. Bits,
119,        ,Bin. Bits,        ,Bin. Bits,        ,Bin. Bits,        ,Bin. Bits,
120,680 /min,RPM,497.8 Nm,Torque,12.2 Nm,Torque,ASR OFF, ,
121,        ,Bin. Bits,        ,Bin. Bits,        ,Bin. Bits,        ,Bin. Bits,
122,680 /min,RPM,497.8 Nm,Torque,9.8 Nm,Torque,No Torq Red, ,
123,        ,Bin. Bits,        ,Bin. Bits,        ,Bin. Bits,        ,Bin. Bits,
124,        ,Bin. Bits,        ,Bin. Bits,        ,Bin. Bits,        ,Bin. Bits,
125,Transm. 1, ,ABS 1, ,Instruments 1, , , ,
126,        ,Bin. Bits,        ,Bin. Bits, , ,        ,Bin. Bits,
127,        ,Bin. Bits,        ,Bin. Bits,        ,Bin. Bits,        ,Bin. Bits,
159,        ,Bin. Bits,        ,Bin. Bits,        ,Bin. Bits,        ,Bin. Bits,
160,        ,Bin. Bits,N/A,,N/A,,N/A,,
189,        ,Bin. Bits,N/A,,N/A,,N/A,,
190,Undocumented 10 field group,,
199,Undocumented 10 field group,,
200,        ,Bin. Bits,        ,Bin. Bits,        ,Bin. Bits,        ,Bin. Bits,
201,        ,Bin. Bits,        ,Bin. Bits,        ,Bin. Bits,        ,Bin. Bits,
202,1.00,(no units),1.00,(no units),1.00,(no units),1.00,(no units),
203,680 /min,RPM,27.8 %,Load,3.12 ms,Inj. On Time,3.12 ms,Inj. On Time,
204,9.4 %,Lambda,4.7 %,Lambda,1.6 %,Lambda,        ,Bin. Bits,
205,3.7 %,Lambda,0.0 %,Lambda,0.0 %,Lambda,0.0 %,Lambda,
206,0.0 %,Load,0.0 %,Load,0.0 %,Lambda,0.0 %,Lambda,
207,00000011,Bin. Bits,00000111,Bin. Bits,00000111,Bin. Bits,00000000,Bin. Bits,
208,        ,Bin. Bits,        ,Bin. Bits,        ,Bin. Bits,        ,Bin. Bits,
209,        ,Bin. Bits,        ,Bin. Bits,        ,Bin. Bits,        ,Bin. Bits,
210,680 /min,RPM,27.8 %,Load,980.0 mbar,Absolute Pres.,0.0°KW,Idle Stabilization,
211,4.28 g/s,Mass Flow,7.86 g/s,Mass Flow,1.00,(no units),430.0 mbar,Absolute Pres.,
212,0.0 %,Load,0.0 %,Lambda,0.0 %,Lambda,0.0 %,Load,
213,26.9 %,Load,27.8 %,Load,0.0 mbar,Absolute Pres.,        ,Bin. Bits,
214,-10.2 %,Lambda,-12.5 %,Lambda,1.00,(no units),1.00,(no units),
215,OK, ,0.00 s,Time,0.00 s,Time,0.00 s,Time,
216,0.00,(no units),0.00,(no units),1.00 s,Time,0.18,(no units),
217,0.00,(no units),0.00,(no units),1.00 s,Time,0.18,(no units),
218,680 /min,RPM,0.0 %,Lambda,0.00 g/s,Mass Flow,Abort, ,
219,680 /min,RPM,0.0 %,Lambda,0.00 g/s,Mass Flow,Abort, ,
220,0.002,Lambda Factor,0.002,Lambda Factor,00000000,Bin. Bits,00001000,Bin. Bits,
221,        ,Bin. Bits,        ,Bin. Bits,        ,Bin. Bits,        ,Bin. Bits,
254,        ,Bin. Bits,        ,Bin. Bits,        ,Bin. Bits,        ,Bin. Bits,

Using the logging screenshot, block 2 is OK, but 106 and 115 doesn't match. Can't find one like 106, but 113 looks like a match for 115.

Jason made a comment about it possibly being related to the LPG. I had to make a journey yesterday, and initially I cleared all the errors. I then ran the car solely on petrol, and the ABS and ESP lights came on after about 5 mile. I scanned it, got the same error codes, and cleared them. I then continued on LPG and the lights again came on after about 5 mile. It may not be scientific proof that it isn't the LPG, but it seems to imply it for me. I've ordered up another MAF sensor, but am going to try and replace the B1S1 O2 sensor first, to see what effect that has on it. Only problem is that it is a b*gg*r to get at.

gupsterg · Oct 26, 2014

steamship said:
Purchased the MAF from EuroCarParts here in the UK, using the part number on the original.

When I went to Eurocarparts they didn't supply air mass meter made by same manufacturer as the genuine VAG one and decided not to buy from them.

Main reason was all the posts by experienced VAG techs I'd read stating go genuine on an air mass meter as can create odd readings/issues.

I don't always buy genuine VAG parts, for instance VDO supply throttle for my car to VAG so bought one from a parts store made by VDO.

steamship said:
I've ordered up another MAF sensor

Where are you getting this one from? if you have your genuine AMM I'd carefully view it to see who made it and get one from same manufacturer.

steamship · Sep 30, 2015

Sorry, but I had completely forgotten about this thread that I started. Just wanted to provide an update on how I resolved it.

Since my last email, I got frustrated with the issues and ordered another MAF from eBay (UK), since the proper one didn't seem to resolve the problem. The eBay one is a non-brand one, and surprisingly, works perfectly. I fitted it, cleared all the offending codes, and haven't seen those lights since. I had thought that the proper one I bought may have been DOA, but all the tests that I ran to check the MAF all came back with results within the tolerances listed in ELSA.

I've also managed to replace the B1S1 O2 sensor as well, so that eliminates issues caused by that.

sazimam · May 31, 2016

DEaar steamship, could you just confirm the MAF change solved your problem for this long term, please? Still OK? THX

steamship · May 31, 2016

sazimam said:
DEaar steamship, could you just confirm the MAF change solved your problem for this long term, please? Still OK? THX

Happy to say that replacing both the MAF and the B1S1 O2 sensor appears to have resolved the issue. No idea why the genuine MAF didn't cure the problem, but the 'no name' one did. Have only seen the lights once since then, but that was caused by water ingress into the ECU compartment in the engine bay. Fingers crossed that I don't see them again.

Audi A8 D2 - 18265 - Load Signal - P1857 - 35-00 - Error Message from ECU

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