P268CCylinder 1 Injector Data Incompatible
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- How the car detects it
- Every modern diesel injector carries a correction code from the factory flow test, and the controller must hold the code of the injector in cylinder 1. P268C sets when that code is missing, outside its range or fails the checksum. GM's 2014 four-cylinder diesel table (14OBDG04) checks the injector quantity adjustment (IQA) checksum once per drive cycle before driving, Type B. Later GM V8, six- and four-cylinder diesel tables rate it Type A, set if the code at DID $60 was never written. Ford's 2023 diesel summary (6.7 L and 3.0 L) runs the check continuously within about 0.5 s. Cylinder 1 exists on every engine, so this is the most widely used code of the series.
- What you may notice
- Check engine light on
- Uneven running or knock from cylinder 1
- Likely causes
- LikelyCorrection code of a new cylinder 1 injector not entered
- PossibleCode entered with a typing error, so the checksum fails
- PossibleController replaced without transferring injector codes
- 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: €50 – €250
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.