Scania MBS DTC 1139 Coolant valve expansion Unit K, short circuit to voltage supply

MBS MBS control unit · Scania

Code 1139 (decimal). Some diagnostic tools show it in hexadecimal as 0473.

In short

The PIN for the coolant valve on expansion unit K is short circuited to the voltage supply.

Applies to: MBS3 (MBS)

What does Scania MBS fault code 1139 mean?

What causes Scania DTC 1139?

How does the system react?

What are the symptoms?

How to fix Scania MBS fault code 1139?

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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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