Title: 2000 Audi A4 1.8T ATW to AWM Wideband ECU Conversion P1841 after tune. Help! Post by: New2Tune on April 13, 2016, 01:28:26 PM 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------------------------- Title: Re: 2000 Audi A4 1.8T ATW to AWM Wideband ECU Conversion P1841 after tune. Help! Post by: VancityA4 on April 13, 2016, 01:46:54 PM FYI New2tune posted this scan for me as I can't post yet as a noob, instrument cluster faults are gone, they were there because I was playing with some adaptations with the radio is all. Still having same issue of p1841. Trans works fine with original ecu, code pops up instantly and comes back instantly when car is running. I can perform all output tests on the trans with the engine off in VCDS regardless of ecu installed and they all pass.
Title: Re: 2000 Audi A4 1.8T ATW to AWM Wideband ECU Conversion P1841 after tune. Help! Post by: VancityA4 on April 13, 2016, 02:20:56 PM I've been told by Greg @ United motorsports that this issue is due to my auto trans being a EFQ model and not the FAL that is much more common. Does anyone know how to change that coding in the ecu? Can it be done through Eeprom?
Title: Re: 2000 Audi A4 1.8T ATW to AWM Wideband ECU Conversion P1841 after tune. Help! Post by: nubcake on April 17, 2016, 03:35:55 PM I've been told by Greg @ United motorsports that this issue is due to my auto trans being a EFQ model and not the FAL that is much more common. Does anyone know how to change that coding in the ecu? Can it be done through Eeprom? EEPROM - no, flash - yes. You need to modify: FMOTC, CWGC, CANVERS in the new software to match those of the original. It should work fine afterwards. Check that MDNORM matches too. Title: Re: 2000 Audi A4 1.8T ATW to AWM Wideband ECU Conversion P1841 after tune. Help! Post by: VancityA4 on April 22, 2016, 01:53:42 PM EEPROM - no, flash - yes. You need to modify: FMOTC, CWGC, CANVERS in the new software to match those of the original. It should work fine afterwards. Check that MDNORM matches too. Thanks a lot Nubcake! I'm getting new2tune to have a look into this for me now. I really appreciate the reply. We were starting on a narrowband tune for my car because I couldn't get the wideband ecu working with it. I'll love you long time if this works out for me! Thank you again! I'll post wether it works out shortly. Title: Re: 2000 Audi A4 1.8T ATW to AWM Wideband ECU Conversion P1841 after tune. Help! Post by: VancityA4 on April 22, 2016, 03:31:00 PM EEPROM - no, flash - yes. You need to modify: FMOTC, CWGC, CANVERS in the new software to match those of the original. It should work fine afterwards. Check that MDNORM matches too. IT WORKED, IT WORKED!! Thank you kindly Nubcake. This has been causing me so much stress, you have no idea. Title: Re: 2000 Audi A4 1.8T ATW to AWM Wideband ECU Conversion P1841 after tune. Help! Post by: nubcake on April 23, 2016, 04:08:07 AM ;)
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