MGU 6657 Scania CAN communication, incorrect data

MGU MGU control unit · Scania

Code 6657 (decimal). Some diagnostic tools show it in hexadecimal as 1A01.

In short

Incorrect or unreliable data in the received CAN message.

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

What does Scania MGU fault code 6657 mean?

What causes Scania DTC 6657?

How does the system react?

What are the symptoms?

How to fix Scania MGU fault code 6657?

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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.

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