Scania EMU DTC 4131 Refrigerant compressor E158, supply voltage, short circuit to earth

EMU EMU control unit · Scania

Code 4131 (decimal). Some diagnostic tools show it in hexadecimal as 001023.

In short

The control unit indicates too low a voltage.

Applies to: EMU1 (ECS)

What does Scania EMU fault code 4131 mean?

The control unit indicates too low a voltage.

What causes Scania DTC 4131?

- Fault in cable harness, connector or actuator. - Internal fault in the control unit.

How does the system react?

- A yellow warning indication is displayed. - Refrigerant compressor E158 turns off.

What are the symptoms?

- Impaired battery cooling. - Impaired truck cab acclimatisation. - Limited propulsion.

How to fix Scania EMU fault code 4131?

  1. Check connectors and cable harnesses between control unit E159 and refrigerant compressor E158.
  2. Renew refrigerant compressor E158.
  3. Replace control unit E159.

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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