The P0677 Code is found in the car engine and you need to know the meaning of the code for solving the car engine problem. This code’s meaning is helpful and it is important when the engine code is perfectly suitable. If you get wrong meaning like automobile dictionary meaning or other meanings from different car manufacturers, you should not use that meaning. You may get terrible problem in the car engine what may be more difficult to solve. If you want to learn some information about the car engine, you can read the automobile dictionary meaning. The powertrain problem is problem of the engine.