This engine P0813 Code is known as trouble code and this code comes when the car engine is tested. Do not drive the car until the problem of the car engine is solved. You must allow the right meaning of the code and the right meaning of the code is found on the car engine manual. You need to find the meaning of the code by the name of the car and manufacturer. You will get meaningful of the everything of the car engine code and the automobile dictionary meanings also lets you know about the problem and location of the problem.