OBD-II code · Powertrain (generic, extended)
P2584 Fuel Additive Control Module Requested MIL Illumination
The fuel additive control module — typical for diesel cars with a separate Eolys/Cerine additive tank that aids DPF regeneration — has requested the ECM to illuminate the MIL because of an emissions-relevant fault on its side. The original fault is in the additive module itself.
Is it safe to drive with P2584?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelyInternal fault in the fuel additive module — read its DTCs
Repair at a glance
- Difficulty
- Medium
- DIY friendly
- Best left to a mechanic
- Typical labour
- 0.3–3 h
- Emissions test
- Likely to fail
- Parts involved
- Fuel Additive Module
Related codes
- P2581Turbocharger/Supercharger Speed Sensor A Circuit High
- P2582Turbocharger/Supercharger Speed Sensor A Circuit Intermittent
- P2583Cruise Control Front Distance Range Sensor Single Sensor or Center
- P2585Fuel Additive Control Module Warning Lamp Request
- P2586Turbocharger Boost Control Position Sensor B Circuit
- P2587Turbocharger Boost Control Position Sensor B Circuit Range/Performance
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.