Scania MBS DTC 905 Fresh air damper for primary roof unit in left-hand roof area, short circuit

MBS MBS control unit · Scania

Code 905 (decimal). Some diagnostic tools show it in hexadecimal as 0389.

In short

The MBS control unit has detected that the voltage to the fresh air damper for the primary roof unit in the left-hand roof area is outside the valid interval.

Applies to: MBS3 (MBS)

What does Scania MBS fault code 905 mean?

What causes Scania DTC 905?

How does the system react?

How to fix Scania MBS fault code 905?

Read the full explanation with Premium

Causes, system reaction, symptoms and step-by-step repair instructions for every fault code are available to Premium members.

  • Full explanations of every code and brand
  • Causes, symptoms and repair steps
  • New brands and codes included
Get Premium – 7,50 € / month I already have an account

Yearly plan: pay 10 months, get 12. Cancel at any time.

This information is for guidance only. Always follow the manufacturer workshop manual and safety procedures; if in doubt, contact an authorised workshop.

Code 905 in other Scania systems

Compare code 905 in every system →