Scania EMS DTC 8504 Throttle

Q: What does Scania EMS fault code 8504 mean?

Throttle. Poor conformity between the throttle potentiometers. Code 8504 (decimal). Some diagnostic tools show it in hexadecimal as 2138.

Q: How to fix Scania EMS fault code 8504?

- Check fuses. - Check the voltage supply to the throttle potentiometers and to the valve block. - Check the cable harness and harness-to-harness connectors. - Check the function of the throttle. - Renew the throttle unit. - Renew the control unit ME7.

EMS Engine Management System · Scania

Code 8504 (decimal). Some diagnostic tools show it in hexadecimal as 2138.

In short

Poor conformity between the throttle potentiometers.

Applies to: EMS S8

What does Scania EMS fault code 8504 mean?

Poor conformity between the throttle potentiometers.

What causes Scania DTC 8504?

Fault in one or both throttle potentiometers.

How does the system react?

May lead to engine shutdown or limp home mode being activated.

How to fix Scania EMS fault code 8504?

Check fuses.
Check the voltage supply to the throttle potentiometers and to the valve block.
Check the cable harness and harness-to-harness connectors.
Check the function of the throttle.
Renew the throttle unit.
Renew the control unit ME7.

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