P2698Exhaust Aftertreatment Fuel Injector A Performance
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- Needs a drive cycle to confirm a fix
- How the car detects it
- P2698 is not about wiring but about whether the exhaust fuel doser does what it is told; most often the check looks for leakage when no dosing is requested. Ford's 3.2 L Transit (2017 and 2018 summaries) compares a measured temperature downstream of the injection point with a model after at least 6 h engine-off. The 2023 6.7 L Super Duty uses a model check after 21,600 s soak plus a second logic that balances oxygen mass before and after the catalyst. Volvo and Mack article KC-90 (model years 2016–17) warns the code can appear without symptoms and points to exhaust sensors, a low-flow nozzle, the AHI module and the catalyst; Mack bulletin GDC19-014 (US19) first updates engine software. Ram also lists P2698 in a 2026 PCM flash for 6.7 L Cummins chassis cabs.
- What you may notice
- MIL on, often without noticeable drivability change
- Regenerations fail or take unusually long
- Higher fuel use or white exhaust smoke
- Likely causes
- LikelyDoser valve or nozzle leaking fuel into the exhaust
- PossibleCoked nozzle or line causing low flow
- PossibleExhaust temperature sensor drifting and skewing the model comparison
- RareEngine software needing the manufacturer update
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Hard · Usually a job for a workshop.Typical cost: €100 – €2,500
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.