Scania EMS DTC 1186 Exhaust brake actuator, break in the circuit

Q: What does Scania EMS fault code 1186 mean?

Exhaust brake actuator, break in the circuit. The control unit indicates a break in the exhaust brake actuator circuit. Code 1186 (decimal). Some diagnostic tools show it in hexadecimal as 0004A2.

Q: How to fix Scania EMS fault code 1186?

- Check the harness-to-harness connectors and cable harness between the exhaust brake and the valve block or the proportional valve for the exhaust brake. - Renew the valve block or proportional valve for the exhaust brake.

EMS Engine Management System · Scania

Code 1186 (decimal). Some diagnostic tools show it in hexadecimal as 0004A2.

In short

The control unit indicates a break in the exhaust brake actuator circuit.

Applies to: EMS10

What does Scania EMS fault code 1186 mean?

The control unit indicates a break in the exhaust brake actuator circuit.

What are the symptoms?

- The exhaust brake is not active, resulting in impaired braking performance. - The white smoke limiter does not work. - Worsened gear changing.

How to fix Scania EMS fault code 1186?

Check the harness-to-harness connectors and cable harness between the exhaust brake and the valve block or the proportional valve for the exhaust brake.
Renew the valve block or proportional valve for the exhaust brake.

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