P268A
Fuel Injector Calibration Not Learned/Programmed
After injector replacement the engine controller did not receive the per-injector flow calibration codes (IMA, ISA, IMV). Cylinder balance and emissions are out of tolerance.
- Check engine light: Yes
- Emissions related: Yes
- Repair difficulty: medium
Symptoms
- Check engine light on
- Misfire or rough idle on the affected cylinder
- Increased fuel consumption
- Possible fuel smell or smoke from exhaust
Common causes
Ordered by how often each turns out to be the cause.
- Injector calibration codes not entered after replacementCommon
- Wrong codes entered for the wrong cylinder positionsPossible
Parts involved
- Fuel Injectors
- Control Module
P268A is a generic OBD-II code defined by SAE J2012. Exact wording and diagnostic procedure vary by manufacturer and model. Code definitions are drawn from the public-domain OBDex dataset; the workshop notes are our own.