Scania EMU DTC 170256 Refrigerant compressor E157, overheating above critical level

EMU EMU control unit · Scania

Code 170256 (decimal). Some diagnostic tools show it in hexadecimal as 029910.

In short

The control unit indicates overheating above the critical level.

Applies to: EMU1 (ECS)

What does Scania EMU fault code 170256 mean?

What causes Scania DTC 170256?

How does the system react?

What are the symptoms?

How to fix Scania EMU fault code 170256?

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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.