Scania EMU DTC 4240 Contactor unit R126, fault in UI sensor

EMU EMU control unit · Scania

Code 4240 (decimal). Some diagnostic tools show it in hexadecimal as 001090.

In short

Internal fault in the UI sensor.

Applies to: EMU1 (ECS)

What does Scania EMU fault code 4240 mean?

What causes Scania DTC 4240?

How does the system react?

What are the symptoms?

How to fix Scania EMU fault code 4240?

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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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