Scania EMU DTC 12551 VCB Fan A IGBT drive circuit undervoltage

EMU EMU control unit · Scania

Code 12551 (decimal). Some diagnostic tools show it in hexadecimal as 003107.

In short

VCB fan A internal diagnostics report that the IGBT drive circuit voltage is too low.

Applies to: EMU1 (ECS)

What does Scania EMU fault code 12551 mean?

What causes Scania DTC 12551?

How does the system react?

What are the symptoms?

How to fix Scania EMU fault code 12551?

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.

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

Code 12551 in other Scania systems