P219BBank 2 Air-Fuel Ratio Imbalance
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Needs a drive cycle to confirm a fix
- How the car detects it
- P219B is the bank 2 counterpart for V and boxer engines. Ford's 2012 summary shows one way to find it: the ECM watches the fast ripple of the bank's wide-band sensor over windows of roughly 50 revolutions and sets the code when more than 75 % of them fail, after 300 to 700 s of driving at 1000 to 3000 rpm and 20 to 60 % load. On one GM 2016 engine the bank 2 limit is 1.15 against 1.05 for bank 1. Bulletins name leaking direct injectors (Ford F-150 2.7 EcoBoost 2018; Explorer and Aviator 3.0 EcoBoost 2023 to 2025, injectors of the affected bank replaced), faulty or contaminated injectors (Honda Pilot 2016), electrical noise in the A/F sensor lines (Mazda CX-9 2011 to 2013) and, at Infiniti on the QX80, a warning not to swap the A/F sensor first. A code on bank 2 only points to a part on that side.
- What you may notice
- Check engine light on
- Usually no driveability change
- Possible misfire codes on bank 2 cylinders
- Likely causes
- LikelyLeaking or contaminated injector on bank 2
- PossibleInterference or damage in the bank 2 A/F sensor wiring
- PossibleIntake runner or gasket leak at one bank 2 cylinder
- RarePCM calibration addressed by a software update
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Medium · Usually a job for a workshop.Typical cost: €0 – €2,000
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.