Fuel Control System B Too Rich Bank 2
Fuel control system B on bank 2 reports a persistently rich condition. Long-term fuel trim is at the negative limit, indicating excess fuel delivery or air metering error.
Affected components
- Fuel injectors
- Fuel pressure regulator
- Intake system
Common causes
- High likelihood: Fuel rail pressure high or regulator stuck
- Medium likelihood: Injector leaking - over-fuelling
Possible symptoms
- Check engine light on
- Increased fuel consumption
- Black smoke from exhaust on acceleration
- Smell of unburned fuel, fouled spark plugs
Diagnostic notes
- The malfunction indicator lamp may illuminate
- This code can affect emissions
- A drive cycle may be required after repair
Related codes
Sources
Diagnostic information is provided for reference only. Confirm the code with a compatible scan tool and follow the vehicle manufacturer's service procedures before replacing components.