Scania MGU DTC 899339 MGU control unit E82, voltage supply, internal hardware fault

Q: How to fix Scania MGU fault code 899339?

- Restart the vehicle in the following sequence: - Turn off the 15 voltage with the starter key. - Wait for at least 20 seconds. - Turn off the 30 voltage with the battery master switch. - Wait for at least 20 seconds. - Turn on the 30 voltage with the battery master switch. - Turn on the 15 voltage with the starter key. - Check if there is a software update available for MGU control unit E82.

MGU MGU control unit · Scania

Code 899339 (decimal). Some diagnostic tools show it in hexadecimal as 0DB90B.

In short

The MGU control unit has detected an abnormal voltage.

Applies to: MGU3 (MGUA3)

What does Scania MGU fault code 899339 mean?

The MGU control unit has detected an abnormal voltage.

What causes Scania DTC 899339?

Fault in the MGU control unit.

How does the system react?

Torque from the powertrain is switched off. A yellow warning indication is displayed.

What are the symptoms?

Propulsion with the electric powertrain is not possible. May lead to consequential fault codes in the MGS control system, the TMS control system and other systems connected to the cable harness for voltage class B.

How to fix Scania MGU fault code 899339?

Restart the vehicle in the following sequence:
Turn off the 15 voltage with the starter key.
Wait for at least 20 seconds.
Turn off the 30 voltage with the battery master switch.
Wait for at least 20 seconds.
Turn on the 30 voltage with the battery master switch.
Turn on the 15 voltage with the starter key.
Check if there is a software update available for MGU control unit E82.

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