Learn about check engine light
A certified repair technician has the knowledge and the access to equipment essential to a proper diagnosis of your problem. Some issues that require proper diagnosis would be sudden illumination of any dashboard warning lights (such as the check engine light), emission failure, engine or transmission performance or steering and ride control malfunction. The diagnostic process will include a scan test to retrieve stored trouble codes and a check of systems and components to eliminate possible causes. Diagnosis and correction can often occur within the same day. Whatever you do, do not take your car to an auto parts store when your check engine light goes on.