For the engine fault, the B2110 Code comes when the engine is tested. The B2110 OBD 2 code on cars with automatically measured by the automatic programs, the 3-4 shift solenoid is accountable for activating the hydraulic routes to activate clutches or bands that variation gears inside the automatic program. The B2110 Code has general meaning as well as it has real meaning. The real meaning of the code is connected with the manual of the car manufacturer. Because some necessary information is put in the manual of the car engine. So, it becomes easier to solve the problem for the automobile engineer.