The C1251 Code is found in many cars and the engine code is important thing for solving the car engine. The general meaning of the is not necessary thing but you can learn something for solving the car engine. Chassis problem is a common problem and this code can be fixed easily. Do not drive the car if the problem of the car engine is not solved easily. The engine system starts the engine C1251 code solenoid valve to control oil compression to the engine instrument that is installed in the valve system to switch valve timing between High and Low. If the engine solenoid valve has an short or open circuit, a DTC is stored.