The meaning of the engine P255A Code is found in the car engine and p means powertrain what needs to fix. As the car engine has the problem and powertrain has the problem, you should take step for solving the car engine. Do not think that the powertrain problem is easy to solve and it is a light problem. You can solve the car engine problem at low rate. Expertise should be used for solving the car engine problem if you do not know how to solve the engine problem, you should not try to solve the car engine problem. Some machines are necessary to use for solving the car engine problem.