Scania MGU DTC 6400 GMS control Unit, no CAN communication

MGU MGU control unit · Scania

Code 6400 (decimal). Some diagnostic tools show it in hexadecimal as 1900.

In short

Expected CAN messages from the GMS control unit are missing.

Applies to: MGU2MGU2 (MGU2X)MGU2 (MGUC2)MGU2 (MGUC2X)

What does Scania MGU fault code 6400 mean?

What causes Scania DTC 6400?

How does the system react?

What are the symptoms?

How to fix Scania MGU fault code 6400?

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This information is for guidance only. Always follow the manufacturer workshop manual and safety procedures; if in doubt, contact an authorised workshop.

Code 6400 in other Scania systems