Post Info TOPIC: 2000 Audi A4 1.8T ATW to AWM Wideband ECU Conversion P1841 after tune. Help!
Jeff Elworthy

Date:
2000 Audi A4 1.8T ATW to AWM Wideband ECU Conversion P1841 after tune. Help!
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Ok I'll try to make a long story short here. I did a wack of upgrades, big turbo, intake, fuel rail, FMIC blah blah blah anyways.  Wideband conversion and got an ecu from a 2001 A4 1.8T Quattro Auto with the ecu model number 4B0 906 018 CH.

Now all the tuners I talked to assured me this ecu would work for my car with a few coding issues that it would have to be sent in for, Immo delete and such. Engine starts great, sounds awesome but the transmission will not shift gears. I can go in reverse and drive, but it shift's to hard 4th IE Trans limp mode. I'm getting error code P1841 when I scan my auto trans module in VCDS. I also checked all the coding between my old ecu and the upgraded one and it is all the same except for the engine code being changed due to having a wideband ecu now.. I'm wondering if it's caused by the engine code digit Via Can on block 013 in the trans module. Stock ecu number is 22 and the tuned ecu is 34. Also the Can data version on stock ecu is 3 and on he tuned ecu it is 10. As it sits I have a $17,000 boat anchor with an engine that sounds awesome lol Any help  would be greatly appreciated!

 

Below are scans from VCDS with both the original and new ECU

 

Stock Scan With VCDS:

 

Chassis Type: 8D - Audi A4/S4/RS4 B5 (1995 > 2001)

Scan: 01 02 03 08 15 16 17 25 35 37 45 55 56 57 67 75 76 77

 

   Mileage: 188890km-117370miles

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

Address 01: Engine        Labels: 058-906-018-ATW.lbl

   Part No: 4B0 906 018 Q

   Component: 1.8L R4/5VT     G   0006  

   Coding: 07251

   Shop #: WSC 06335  

   VCID: 2F677849EDF89859C61-5178

 

4 Faults Found:

17956 - Boost Pressure Regulation Valve (N75) 

            P1548 - 35-00 - Open Circuit

17526 - Oxygen (Lambda) Sensor Heating; B1 S2 

            P1118 - 35-00 - Open Circuit

17840 - Secondary Air Injection Solenoid Valve (N112) 

            P1432 - 35-00 - Open Circuit

17695 - Boost Pressure Control Valve (N249) 

            P1287 - 35-00 - Open Circuit

Readiness: 0110 1101

 

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

Address 02: Auto Trans        Labels: 01V-927-156.lbl

   Part No: 8D0 927 156 AP

   Component: AG5 01V 1.8l5VT USA 3132  

   Coding: 00002

   Shop #: WSC 00000  

   VCID: 7BFF9C196900B4F93A9-5178

 

No fault code found.

 

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

Address 03: ABS Brakes        Labels: 8E0-614-111-EDS.lbl

   Part No: 8E0 614 111 A

   Component: ABS/EDS 5.3 QUATTRO D10  

   Shop #: BB 24334  

   VCID: 1C3DBF858C4E13C1933-5178

 

No fault code found.

 

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

Address 08: Auto HVAC        Labels: None

   Part No: 8D0     ?082

   Component: 8D0820043P  A4     KLIMA  

   VCID: 57B7E0A9B5E8B0997E1-25AA

 

2 Faults Found:

00787 - Temperature Sensor in Fresh Air intake duct (G89) 

            30-00 - Open or Short to Plus

00779 - Outside Air Temp Sensor (G17) 

            30-00 - Open or Short to Plus

 

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

Address 15: Airbags        Labels: 8D0-959-655-AI8.lbl

   Part No: 8D0 959 655 K

   Component: Airbag Front+Seite 1002  

   Coding: 00104

   Shop #: WSC 06335  

   VCID: 3E79550D3A9261D15D7-5178

 

No fault code found.

 

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

Address 17: Instruments        Labels: 8D0-920-xxx-17.lbl

   Part No: 8D0 920 930 D

   Component: B5-KOMBIINSTR. VDO D11   

   Coding: 00344

   Shop #: WSC 00000  

   VCID: 27579069C508C0190E1-515A

 

2 Faults Found:

01304 - Radio 

            49-00 - No Communications

01311 - Information Data Bus 

            37-10 - Faulty - Intermittent

 

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

Address 35: Centr. Locks        Labels: 8D0-862-257.lbl

   Part No: 8L0 862 257 N

   Component: CV-Pump             D11  

   Coding: 16140

   Shop #: WSC 06335  

   VCID: 40852BF5406617212FB-4F1E

 

No fault code found.

 

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

Address 45: Inter. Monitor        Labels: 4B0-951-173.lbl

   Part No: 4B0 951 173 

   Component: Innenraumueberw.    D03  

   Coding: 00101

   Shop #: WSC 06335  

   VCID: 60C5CB75E0A677210FB-4B64

 

No fault code found.

 

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

Address 56: Radio        Labels: 8D0-035-1xx-56.lbl

   Part No: 8D0 035 195 A

   Component:  Radio              D00  

   Coding: 00115

   Shop #: WSC 06335  

   VCID: 244D8765B43E2B012B3-4B18

 

No fault code found.

 

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

 

 

****And with the CH ECU:

 

Chassis Type: 8D - Audi A4/S4/RS4 B5 (1995 > 2001)

Scan: 01 02 03 08 15 16 17 25 35 37 45 55 56 57 67 75 76 77

 

   Mileage: 188890km-117370miles

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

Address 01: Engine        Labels: 06B-906-018-AWM.clb

   Part No: 4B0 906 018 CH

   Component: 1.8L R4/5VT     G   0002  

   Coding: 16251

   Shop #: WSC 88641  

   VCID: 69D3D651139C3669D85-515A

 

7 Faults Found:

18058 - Powertrain Data Bus 

            P1650 - 35-00 - Missing Message from Instrument Cluster

17956 - Boost Pressure Regulation Valve (N75) 

            P1548 - 35-00 - Open Circuit

17837 - Circuit for Brake Vacuum Pump 

            P1429 - 35-00 - Open Circuit

17939 - Camshaft Timing Adjustment 

            P1531 - 35-00 - Open Circuit

17840 - Secondary Air Injection Solenoid Valve (N112) 

            P1432 - 35-00 - Open Circuit

17695 - Boost Pressure Control Valve (N249) 

            P1287 - 35-00 - Open Circuit

18320 - Pressure Sensor for Brake Boost (G294) 

            P1912 - 35-00 - Short to Plus

Readiness: 0010 1000

 

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

Address 02: Auto Trans        Labels: 01V-927-156.lbl

   Part No: 8D0 927 156 AP

   Component: AG5 01V 1.8l5VT USA 3132  

   Coding: 00002

   Shop #: WSC 00000  

   VCID: 7BFF9C196900B4F93A9-5178

 

1 Fault Found:

18249 - Engine Control Module / Transmission Control Module Incompatible 

            P1841 - 35-00 - 

 

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

Address 03: ABS Brakes        Labels: 8E0-614-111-EDS.lbl

   Part No: 8E0 614 111 A

   Component: ABS/EDS 5.3 QUATTRO D10  

   Shop #: BB 24334  

   VCID: 1C3DBF858C4E13C1933-515A

 

No fault code found.

 

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

Address 08: Auto HVAC        Labels: 8D0-820-043-1D.lbl

   Part No: 8D0 820 043 P

   Component: A4     KLIMAAUTOMAT D57  

   Coding: 00040

   Shop #: WSC 06335  

   VCID: 2D5B6241E7F4EA49F4D-25AA

 

No fault code found.

 

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

Address 15: Airbags        Labels: 8D0-959-655-AI8.lbl

   Part No: 8D0 959 655 K

   Component: Airbag Front+Seite 1002  

   Coding: 00104

   Shop #: WSC 06335  

   VCID: 3E79550D3A9261D15D7-5178

 

No fault code found.

 

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

Address 17: Instruments        Labels: 8D0-920-xxx-17.lbl

   Part No: 8D0 920 930 D

   Component: B5-KOMBIINSTR. VDO D11   

   Coding: 00344

   Shop #: WSC 00000  

   VCID: 27579069C508C0190E1-515A

 

1 Fault Found:

01311 - Information Data Bus 

            37-00 - Faulty

 

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

Address 35: Centr. Locks        Labels: 8D0-862-257.lbl

   Part No: 8L0 862 257 N

   Component: CV-Pump             D11  

   Coding: 16140

   Shop #: WSC 06335  

   VCID: 40852BF5406617212FB-4F1E

 

No fault code found.

 

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

Address 45: Inter. Monitor        Labels: 4B0-951-173.lbl

   Part No: 4B0 951 173 

   Component: Innenraumueberw.    D03  

   Coding: 00101

   Shop #: WSC 06335  

   VCID: 60C5CB75E0A677210FB-4B64

 

No fault code found.

 

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

Address 56: Radio        Labels: 8D0-035-1xx-56.lbl

   Part No: 8D0 035 195 A

   Component:  Radio              D00  

   Coding: 00115

   Shop #: WSC 06335  

   VCID: 244D8765B43E2B012B3-4B00

 

No fault code found.

 

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



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