An expert automobile engineer knows well how to solve the car engine. He must test the car engine by the machine and manually. An automobile dictionary meaning of the code, he may use easily but he must look for the actual meaning of the code for solving the car engine problem. The car engine P2237 Code is found from the car engine by the machine test and test the car engine manually. The car engine should be solved as soon as possible. Otherwise, the car engine may get some new problems what can be difficult to solve or expensive.