Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Encode control module
Have you just replaced a control module with traction control function (ASR), or is one of the following DTCs stored in the DTC memory of the control module?
- "ABS/EDL/transmission - electrical connection"
- "Control module incorrectly encoded"
- "CAN-bus - No message from transmission control module"
The control module must be coded according to the type of engine and transmission.
- The coding can only be performed if a workshop code is stored in V.A.G 1551.
See Operating instructions for V.A.G 1551.
- The 5-digit coding will appear when the control module identification is displayed.
- Connect Scan tool V.A.G 1551 and select "Brake electronics" with address word 03. See VAG1551 SCAN TOOL (ST), CONNECTING AND ENTERING ADDRESS WORD .
- Check the control module version. See CHECK CONTROL MODULE VERSION and press the --> button.
- Press --> button.
Indicated on display:
- Press buttons -0- and -7- for "Coding control module" function.
Indicated on display:
- Confirm input with -Q- button.
Indicated on display:
- Enter the required code number and confirm with -Q- button.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.