Powertrain, generic (extended)

P268E Cylinder 3 Injector Data Incompatible

Check engine lightOn
EmissionsRelevant
Drive cycleNot required
Limp modeNo

For cylinder 3 the controller compares the injector's correction value with what its software accepts. Ford's 2023 diesel OBD summary explains the idea well: each injector's code, kept in EEPROM, describes how far that unit departs from an idealised mean part, and a DTC is logged if the value is absent, out of range or its checksum is wrong. The monitor runs continuously and needs about half a second. GM's 2019 V8 diesel table 19OBDG04A rates P268E Type A, so the lamp lights in the first trip. Because only the data is checked, the injector itself may be perfect; the usual fix is to read the code off the injector head and program it into the controller.

Likely causes

Cylinder 3 injector replaced, code not programmed
Code from an injector variant the software does not accept
Stored injector data corrupted in the controller

Symptoms

  • Check engine light on
  • Usually no noticeable driveability change

Repair estimate

DifficultyMediumWorkshop job
Parts and labour€50–250
Time0.3–1 h

Typical range across vehicles; the real cost depends on what the testing finds.

Parts involved

fuel injector cyl3control module

Related codes

P268DP268FP2696P0203P02F0

References: law.cornell.edu, fordservicecontent.com, gsi.ext.gm.com.