Scania MBS DTC 839 Primary temperature sensor for passenger area, implausible value

MBS MBS control unit · Scania

Code 839 (decimal). Some diagnostic tools show it in hexadecimal as 0347.

In short

The primary temperature sensor for the passenger area displays an implausible value.

Applies to: MBS3 (MBS)

What does Scania MBS fault code 839 mean?

The primary temperature sensor for the passenger area displays an implausible value.

What causes Scania DTC 839?

- Fault in the temperature sensor. - The temperature sensor has short-circuited.

How does the system react?

A yellow warning indication is displayed.

What are the symptoms?

- The air flow to the passenger area is too hot or too cold. - The temperature displayed in the Instrument cluster does not correspond to the actual temperature in the passenger area.

How to fix Scania MBS fault code 839?

  1. Check the temperature sensor's cable harness and harness-to-component connector.
  2. Check the temperature sensor.
  3. Renew the temperature sensor.

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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