Scania BMU DTC 823 Temperature sensor for heater H32, short circuit to earth

BMU Battery Management Unit · Scania · 2 variants

Code 823 (decimal). Some diagnostic tools show it in hexadecimal as 0337.

In short

The BMU control unit indicates that the heater temperature sensor has a short-circuit.

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 823 mean?

What causes Scania DTC 823?

How does the system react?

What are the symptoms?

How to fix Scania BMU fault code 823?

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
Get Premium – 7,50 € / month I already have an account

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

Variant 2: Circuit for heater H32

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 823 in other Scania systems

Compare code 823 in every system →