P0268 P0268 code definition Cylinder number 3 Injector Circuit High What the P0268 code means P0268 is an OBD-II diagnostic trouble code (https://www.yourmechanic.com/article/what-is-the-on-board-diagnostics-obd-system) that is stored when the engine control module (ECM) (https://www.yourmechanic.com/article/what-is-a-vehicle-s-electrical-control-unit) detects that the cylinder number 3 injector...