Powertrain
generic / SAE
P219B
Bank 2 Air-Fuel Ratio Imbalance
The fuel-trim values across cylinders on bank 2 differ enough that the bank-average air-fuel ratio is biased — a single cylinder is significantly leaner or richer than the rest. Detected by short-term-fuel-trim variance or by the wide-band O2 sensor harmonic monitor.
SystemPowertrain
Typegeneric / SAE
GroupP2
Range / number1 / 9B
Possible causes
- One injector clogged or leaking high
Inspection / repair
- Difficulty: hard
- DIY: shop recommended
- Estimated cost: 200–2500 €
- Estimated time: 1–6 h
- Component: fuel injector
- Component: oxygen sensor
- MIL / check engine light
- emissions-relevant
Sources
References
sae:J2012