The engine P1392 Code is found in the car engine and it is a simple langue what has many meanings and you will allow the right meaning of the code. You should not try to use any wrong meaning or try to solve the car engine by yourself if you are not right person for solving the car engine. You need to use some tools and expensive machines for checking the car engine and solving the problem. If you do not know the real reason of the problem. The problem of the car engine will not be fixed first and smoothly.