Scania BMU DTC 4209 Battery cells, voltage drop

BMU Battery Management Unit · Scania

Code 4209 (decimal). Some diagnostic tools show it in hexadecimal as 001071.

In short

The voltage for 1 or more battery cells has dropped below the permitted limit.

Applies to: BMU7 (BMUA)BMU7 (BMUB)BMU7 (BMUC)BMU7 (BMUD)BMU7 (BMUE)BMU7 (BMUF)BMU7 (BMUG)BMU7 (BMUH)BMU7 (BMUI)BMU7 (BMUJ)BMU7 (BMUK)BMU7 (BMUL)BMU7 (BMUM)BMU7 (BMUN)BMU7 (BMUO)BMU7 (BMUP)

What does Scania BMU fault code 4209 mean?

What causes Scania DTC 4209?

How does the system react?

How to fix Scania BMU fault code 4209?

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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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