The C1285 Code is related with the car engine and it is important to know the meaning of the code. The meaning of the code is found online but that is not really important thing. You have to know how to fix the car engine problem if you have all machines and tools for solving the car engine. The engine system, in conjunction with the engine controller module, powertrain control module, triggers the engine C1285 code solenoid valve to maintain the oil pressure to the engine instrument that is fit in the valve scheme to switch valve timing between Low and High. If the engine solenoid valve has a short circuit, a DTC is stored.