Scania EMS DTC 1189 Exhaust brake actuator, short circuit to voltage supply

EMS Engine Management System · Scania

Code 1189 (decimal). Some diagnostic tools show it in hexadecimal as 0004A5.

In short

The EMS control unit interprets that the exhaust brake actuator has a short circuit to voltage supply.

Applies to: EMS10

What does Scania EMS fault code 1189 mean?

What are the symptoms?

How to fix Scania EMS fault code 1189?

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.