Powertrain
generic / SAE
P20CC
Exhaust Aftertreatment Fuel Injector A Control Performance
The aftertreatment HC injector A is electrically OK but does not deliver the commanded fuel mass during regeneration — partial blockage or worn nozzle.
SystemPowertrain
Typegeneric / SAE
GroupP2
Range / number– / CC
Possible causes
- Nozzle partially coked high
- HC supply pressure low medium
Symptoms
- Check engine light on
- Misfire or rough idle on the affected cylinder
- Increased fuel consumption
- Possible fuel smell or smoke from exhaust
Inspection / repair
- Difficulty: hard
- DIY: shop recommended
- Estimated cost: 200–1500 €
- Estimated time: 1–4 h
- Component: aftertreatment fuel injector
- MIL / check engine light
- emissions-relevant
Sources
References
sae:J2012