Scania EMU DTC 4243 Contactor unit R126, fault in UI sensor

EMU EMU control unit · Scania

Code 4243 (decimal). Some diagnostic tools show it in hexadecimal as 001093.

In short

Internal fault in the UI sensor.

Applies to: EMU1 (ECS)

What does Scania EMU fault code 4243 mean?

What causes Scania DTC 4243?

How does the system react?

What are the symptoms?

How to fix Scania EMU fault code 4243?

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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 4243 in other Scania systems