P268FCylinder 4 Injector Data Incompatible
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- How the car detects it
- P268F flags missing or unusable correction data for the injector in cylinder 4. On four-cylinder diesels it closes the series: GM's 2014 table 14OBDG04 and 2016 table 16OBDG04 list P268C to P268F and nothing beyond. The 2014 version checks the IQA checksum before each trip and rates the fault Type B, so the lamp waits for a second failed trip; the 2016 version uses the DID $63 write check and Type A. Six- and eight-cylinder engines from GM and Ford use the code as well. CARB requires that a wrong compensation be detected and, where feasible, traced to the specific injector. A single unmatched injector seldom causes clear symptoms, but emissions and noise can rise.
- What you may notice
- Check engine light on
- Possible rough idle or higher combustion noise
- Likely causes
- LikelyNew cylinder 4 injector fitted without code programming
- PossibleCode typed incorrectly into the scan tool
- RareUsed or replacement controller carrying another engine's 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.