P268F code meaning
Cylinder 4 Injector Data Incompatible
Powertrain system Generic code P26xx codes Check engine light
What P268F means
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.
P268F at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modeNot expected
- Repair difficultyMedium
- Typical labor0.3 to 1 hours
- Clears after repairWhen cleared with a scanner
Symptoms of P268F
- Check engine light on
- Possible rough idle or higher combustion noise
Common causes of P268F
- Most likelyNew cylinder 4 injector fitted without code programming
- PossibleCode typed incorrectly into the scan tool
- Less likelyUsed or replacement controller carrying another engine's codes
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Fuel injector cyl4Control module
What each part of P268F means
| P | Powertrain system: engine, fuel system, ignition, emissions and transmission. |
| 2 | Generic code (second SAE range): it means the same on every make. |
| 6 | Area: computer (engine control module) and output circuits. |
| 8F | The exact fault in that area. |
What to do next
- Note P268F and any other codes stored with it: several codes together often point to one cause.
- Check for loose connectors and damaged wiring around the parts the code names.
- Check open recalls for your car: some faults are fixed for free by the dealer. Enter your VIN.
- Clear the code only after the repair. If it comes back, the fault is still there.
Buying a used car? Scan it for stored codes before you pay. A recently cleared memory can hide a problem.
Questions about P268F
What does P268F mean?
P268F means "Cylinder 4 Injector Data Incompatible". P268F flags missing or unusable correction data for the injector in cylinder 4. It is a generic code, so it means the same on every make.
Is it safe to drive with P268F?
Usually yes, for a short time, if the check engine light is steady and the car drives normally. If the light flashes or the car runs badly, stop and have it checked.
Will P268F fail an emissions test?
Yes, it can. P268F is emissions-related, so most inspection programs fail a car while it is stored or while the check engine light is on.
How hard is P268F to fix?
Difficulty: medium. A typical repair takes 0.3 to 1 hours of work. This is a job for a workshop.
Will P268F clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.