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hans1807
Joined: 10/21/2006 Posts: 5 Karma: +0 / -0
Free account, no CAN development support
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21-10-2006, 10:25 Subject: Recode ECU: How to Reprogram Car Computer |
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Hello, I'm having a problem when trying to program the engine control unit (ECU) 4B0906018BH from a Passat with an AWT engine. I want to reprogram the ECU to remove the transmission settings and disable ESP.
VAG-COM also shows me the necessary settings, but the control unit doesn't accept them. Does this control unit require a valid login code first, or am I doing something wrong? If a login code is required, where can I get it?
I have VAG-COM version 607.3.
Translated on 08-09-2026, 21:18.
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Ross-Tech-Support Profi-Schrauber

Joined: 05/30/2005 Posts: 646 Karma: +8 / -0
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21-10-2006, 12:20 Subject: Recode ECU: How to Reprogram Car Computer |
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The control unit does not accept the coding because it is intended for automatic transmission vehicles.
Translated on 08-09-2026, 21:19.
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hans1807
Joined: 10/21/2006 Posts: 5 Karma: +0 / -0
Free account, no CAN development support
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21-10-2006, 12:25 Subject: Recode ECU: How to Reprogram Car Computer |
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Thank you for the reply. Does that mean it cannot be reprogrammed? Is it possible to use it as is, or are there any negative consequences besides the error messages? The engine is installed in a kit car, so it doesn't have ABS, ESP, etc.
Translated on 08-09-2026, 21:19.
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Skoda Doc Blaumann

Joined: 01/18/2006 Posts: 47 Karma: +1 / -0 Location: Malsfeld
Registered VCDS User
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22-10-2006, 22:25 Subject: Recode ECU: How to Reprogram Car Computer |
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Hmm, it's possible that he doesn't like it, and that could cause errors and put him into emergency mode.
There must be a whole bunch of errors in there. 97´Golf Variant Joker AFN
03´Bora ARL UK Import
93´Mitsubishi GTO UK Import
Translated on 08-09-2026, 21:20.
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Ross-Tech-Support Profi-Schrauber

Joined: 05/30/2005 Posts: 646 Karma: +8 / -0
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22-10-2006, 23:46 Subject: Recode ECU: How to Reprogram Car Computer |
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A single error can trigger the emergency mode, while an incorrect encoding might seem harmless, but it can also lead to driving problems and similar issues – it always depends on the specific case.
Translated on 08-09-2026, 21:20.
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hans1807
Joined: 10/21/2006 Posts: 5 Karma: +0 / -0
Free account, no CAN development support
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23-10-2006, 8:30 Subject: Recode ECU: How to Reprogram Car Computer |
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So far, only the following errors have occurred:
3 errors found:
18057 - Data bus communication: No message received from the ABS control unit.
P1649 - 35-00 - -
18034 - Data bus communication: Missing message from the transmission control unit.
P1626 - 35-00 - -
17931 - Airbag control unit crash signal: implausible signal.
P1523 - 35-00 - -
However, the car hasn't been driven yet, and the engine has only been running while stationary.
Does anyone know if the previous errors will cause the vehicle to go into emergency mode, or if the engine is still drivable?
Translated on 08-09-2026, 21:21.
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