Powertrain
generic / SAE
P21FF
Fuel Control System B Too Rich at Higher Load (Bank 2)
The secondary fuel control loop B reports a rich condition at higher load on bank 2. Rich at high load typically points to a stuck-closed return on the fuel pressure regulator or over-delivering injectors.
SystemPowertrain
Typegeneric / SAE
GroupP2
Range / number1 / FF
Possible causes
- Injectors over-deliver on bank 2 high
Symptoms
- Check engine light on
- Increased fuel consumption
- Black smoke from exhaust on acceleration
- Smell of unburned fuel, fouled spark plugs
Inspection / repair
- Difficulty: medium
- DIY: possible
- Estimated cost: 80–1500 €
- Estimated time: 0.7–5 h
- Component: fuel injector
- MIL / check engine light
- emissions-relevant
Sources
References
sae:J2012