P23F6Cylinder 5 Injector B 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
- P23F6 flags cylinder 5 and is the first code in this row that a four-cylinder engine can never set. Engines with port plus direct injection and at least five cylinders are mostly V6 and V8 units: Ford's second-generation 3.5 EcoBoost V6, first shown in the 2017 Ford GT, Toyota's 2GR-FKS V6 with D-4S, and the V8s named at P23F8. On the Lamborghini Huracán V10, which combines direct and multi-point injection, cylinder 5 closes the first group of five. The code means the trim of that single cylinder points to its injector B, which in these designs is the port injector. Nobody publishes P23F6 with a threshold. Confirm the maker's numbering, then compare P21A0 and the misfire counter P0305 before replacing the injector.
- What you may notice
- Check engine light on
- Usually no change in performance
- Fuel trim of the affected bank drifts
- Likely causes
- LikelyPort injector of cylinder 5 out of tolerance
- PossibleIntake manifold gasket leaking near cylinder 5
- RareIntermittent contact in the injector B wiring of cylinder 5 (P21D3)
- 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: €100 – €900
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.