Scania BMU DTC 842 Fan M40 for cooling MGS and DCC, short circuit

BMU Battery Management Unit · Scania · 2 variants

Code 842 (decimal). Some diagnostic tools show it in hexadecimal as 034A.

In short

Electrical fault in fan M40.

Variant 1

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 842 mean?

What causes Scania DTC 842?

What are the symptoms?

How to fix Scania BMU fault code 842?

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Variant 2: Fan M40 for rechargeable energy storage system

Applies to: BMU5

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

Code 842 in other Scania systems

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