The meaning of the car engine P2438 Code explain the problem of the car engine. Do not use any meaning of the code what is not related with the actual meaning of the code. The actual meaning of the code may match properly with the car engine problem. If you use wrong meaning of the code, the meaning may not well match with the actual problem. You should be very careful when you fix the car engine. The letter P means powertrain and this problem is not very difficult to solve. You should fix the car engine problem by help of an expert engineer.