The diagnosis engine U1226 Code is a short description what helps to solve the car engine problem fast. The code has different meanings and you need to know the right meaning. The car manufacturer of your car has set a meaning of the code what you need to follow for solving the car engine. However, without getting real cause of the car engine, it is difficult to solve the car engine problem. You need to test all symptoms to find the cause of the problem. If the problem is found, you need to take steps for solving the car engine.