Scania EMU DTC 12553 VCB Fan A motor overspeed warning

EMU EMU control unit · Scania

Code 12553 (decimal). Some diagnostic tools show it in hexadecimal as 003109.

In short

VCB Fan A internal diagnostics report that motor speed is too high.

Applies to: EMU1 (ECS)

What does Scania EMU fault code 12553 mean?

What causes Scania DTC 12553?

How does the system react?

What are the symptoms?

How to fix Scania EMU fault code 12553?

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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.