Scania BMU DTC 850 Service switch S229, short circuit

BMU Battery Management Unit · Scania

Code 850 (decimal). Some diagnostic tools show it in hexadecimal as 0352.

In short

Short circuit to ground, service switch S229.

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 850 mean?

What causes Scania DTC 850?

How does the system react?

How to fix Scania BMU fault code 850?

Read the full explanation with Premium

Causes, system reaction, symptoms and step-by-step repair instructions for every fault code are available to Premium members.

  • Full explanations of every code and brand
  • Causes, symptoms and repair steps
  • New brands and codes included

Yearly plan: pay 10 months, get 12. Cancel at any time.

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

Code 850 in other Scania systems

Compare code 850 in every system →