The automobile meaning of the engine U1178 Code is a common thing for the car engineer what he can find online for free. Do not use common meaning of the engine code what is available online. The automobile meaning of the engine code gives general information about the engine problem. It may not match with your car engine problem. You should seek the real meaning of the code if you want to solve the car engine. If the real meaning of the code is unavailable, then you can accept the automobile meaning of the code as a second meaning of the engine code.