Scania BMU DTC 857 Battery module 4 in propulsion battery, CAN communication interrupted

BMU Battery Management Unit · Scania

Code 857 (decimal). Some diagnostic tools show it in hexadecimal as 0359.

In short

Communication with battery module 4 in the propulsion battery was interrupted.

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 857 mean?

What causes Scania DTC 857?

How does the system react?

How to fix Scania BMU fault code 857?

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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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