The engine B2428 OBD 2 code on car with automatically measured automatic transmissions, the 3 to 4 shift solenoid is answerable for activating the hydraulic circuits to trigger clutches or bands that modification gears inside the reflex transmission. The general meaning of the of the code is B is Body Code Problem is antilock brake system, electronic suspension and steering systems. 2 is MFG – Manufacturer Specific. 4 is Transmission. 2 for Air Conditioning (A/C) Clutch Feedback Circuit High Voltage and 8 for PCM Stack Overrun. Engine’s body of the car has the problem and it is easy to fix the problem.