When any problem is detected in the car engine, do not ignore the problem. You must take the car for checking the engine. The car engine P1233 Code is found from the car when the car engine was checked and it is meaningful what gives you some information about the car engine and problem. It also lets you know about the location of the problem. However, you must not fix the car engine by the wrong meaning and you must not try to solve the car engine by yourself if you are not able to fix or you are not an expert automobile engineer.