Powertrain
generic / SAE
P20CD
Exhaust Aftertreatment Fuel Injector A Control Circuit Low
Exhaust Aftertreatment Fuel Injector A Control Circuit Low: the control-circuit voltage is below the expected range. This injector doses fuel into the exhaust to raise temperature for diesel particulate-filter regeneration; it does not fuel the engine.
SystemPowertrain
Typegeneric / SAE
GroupP2
Range / number– / CD
Possible causes
- Short to ground high
- Connector pins corroded - high contact resistance low
- Harness chafing through insulation 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
- MIL / check engine light
- emissions-relevant
Sources
References
sae:J2012