Scania BMU DTC 903 Propulsion battery, cell voltage exceeded critical level

BMU Battery Management Unit · Scania

Code 903 (decimal). Some diagnostic tools show it in hexadecimal as 0387.

In short

The cell voltage has exceeded the safety limit in one of the battery modules.

Applies to: BMU6 (RES)BMU6 (RESXA)BMU6 (RESXB)BMU6 (RESXC)BMU6 (RESXD)BMU6 (RESXE)BMU6 (RESXF)BMU6 (RESXG)BMU6 (RESXH)BMU6 (RESXI)BMU6 (RESXJ)BMU6 (RESXK)

What does Scania BMU fault code 903 mean?

What causes Scania DTC 903?

How does the system react?

What are the symptoms?

How to fix Scania BMU fault code 903?

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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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