Powertrain
generic / SAE
P20DB
Exhaust Aftertreatment Fuel Supply Control Stuck Open
Aftertreatment fuel supply solenoid stuck open mechanically — fuel pressure cannot be cut off, risk of over-fueling exhaust.
SystemPowertrain
Typegeneric / SAE
GroupP2
Range / number– / DB
Possible causes
- Solenoid stuck open high
- Carbon or debris buildup preventing free movement low
- Component wear with age - mechanical play low
Inspection / repair
- Difficulty: hard
- DIY: shop recommended
- Estimated cost: 200–1500 €
- Estimated time: 1–4 h
- Component: aftertreatment fuel supply solenoid
- MIL / check engine light
- emissions-relevant
- limp mode possible
Sources
References
sae:J2012