Variant 1
Applies to: EMS S7
What does Scania EMS fault code 8584 mean?
The engine management system has registered via the lambda control that the gas mixture contains too little air.
What causes Scania DTC 8584?
- The measurements from the air flow sensor are incorrect - The air filter is blocked - The gas supply does not work satisfactorily
How does the system react?
There is a risk of misfiring. May affect engine performance.
How to fix Scania EMS fault code 8584?
Check the entire gas and air supply system.
Variant 2: Lambda control
Applies to: EMS S8
Detection
The air/fuel mixture contains too little air (rich mixture).
Possible cause
Blocked air filter. Fault in the air supply circuit. The air mass flow and fuel injection readings are incorrect. The gas supply is not working.
System reaction
There is a risk of misfiring. May affect engine performance.
How to fix
- Troubleshoot the air supply circuit.
- Check the gas supply.
This information is for guidance only. Always follow the manufacturer workshop manual and safety procedures; if in doubt, contact an authorised workshop.