Scania EMU DTC 12548 VCB fan A 5V circuit voltage is too high.

EMU EMU control unit · Scania

Code 12548 (decimal). Some diagnostic tools show it in hexadecimal as 003104.

In short

VCB fan A internal diagnostics report that the 5V circuit voltage is too high.

Applies to: EMU1 (ECS)

What does Scania EMU fault code 12548 mean?

What causes Scania DTC 12548?

How does the system react?

What are the symptoms?

How to fix Scania EMU fault code 12548?

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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.