The real meaning of the engine U1243 Code is valuable for solving the car engine problem. The normal meaning of the car engine is not important thing but you will get the automobile meaning of the car engine from online. Do not drive the car until the car engine is fixed. It is necessary to fix the car engine by expertise. This code is related with the network problem of the car engine and it is important thing to get the right meaning of the code and it is related with the manufacturer and brand of the car engine. Network problem is easy to fix.