Powertrain
generic / SAE
P20CB
Exhaust Aftertreatment Fuel Injector A Control Circuit/Open
The 7th-injector (HC dosing into exhaust upstream of DOC/DPF) for aftertreatment regeneration on circuit A is open — DPF/SCR regeneration cannot raise exhaust temperature.
SystemPowertrain
Typegeneric / SAE
GroupP2
Range / number– / CB
Possible causes
- Injector winding open high
- Open wire to injector medium
- Pin pushed back out of connector body low
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
- Component: aftertreatment fuel pump
- MIL / check engine light
- emissions-relevant
Sources
References
sae:J2012