Scania EMU DTC 20553 Vehicle charging inlet box R130, UI sensor, positive contactor for the vehicle has an unauthorised VCB voltage

EMU EMU control unit · Scania

Code 20553 (decimal). Some diagnostic tools show it in hexadecimal as 005049.

In short

The control unit reports voltage outside the approved range.

Applies to: EMU1 (ECS)

What does Scania EMU fault code 20553 mean?

What causes Scania DTC 20553?

How does the system react?

What are the symptoms?

How to fix Scania EMU fault code 20553?

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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.