The engine C1702 OBD 2 code on cars with electronically controlled automatic transmissions and it works the 3-4 shift solenoid is accountable for activating the hydraulic circuits to start clutches or bands that change gears inside the auto program. The deactivation process of cylinders is accomplished by liberating a synchronizer pin that usually interlocks the cam follower and rocker arms. The engine C1702 code solves the synchronizer pin is unconfined using hydraulic compression which is measured by a dedicated solenoid. The C1702 engine code is a sort of chassis problem. After solving the car engine, take the car for a test drive.