Powertrain, generic (extended)

P268F Cylinder 4 Injector Data Incompatible

Check engine lightOn

EmissionsRelevant

Drive cycleNot required

Limp modeNo

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.

Likely causes

New cylinder 4 injector fitted without code programming

Code typed incorrectly into the scan tool

Used or replacement controller carrying another engine's codes

Symptoms

Check engine light on
Possible rough idle or higher combustion noise

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 cyl4control module

Related codes

P268E P2690 P2696 P0204 P02F1

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