The engine C1855 Code gives information about the car engine problem and if the real meaning of the engine code is not found, you cannot fix the car engine. Do not drive the car with any type of car engine problem. You should be careful when you get any mistake in the car engine. However, for solving the car engine problem understanding or getting the real meaning of the engine code is necessary to know. Read the car engine manual to get the real meaning of the code for solving the car engine. Do not allow wrong meaning of the code for fixing the car engine.