When car engine is not ok, then solve the problem from the car engine. Checking the car engine is first task and the car engine P1602 Code is found by the test the car engine. For solving the car engine, you need to know the correct meaning and some important machines. If you do not have all those machines and you do not know the process of solving the car engine, you should not try to solve the car engine. The real meaning of the code is found from the car manufacturer and do not use automobile dictionary meaning if you know the real meaning of the code.