Do you experience that sinking feeling in your stomach when the check engine light goes on. An on board computer continuously monitors the various systems that operate our cars; warning lights, such as the check engine light, illuminate when the computer receives a signal that something is amiss with one of those systems. Since your check engine light can indicate any one of a number of issues, it can be difficult to determine the nature of the problem right off the bat.
It is crucial to have your car checked by a certified repair technician as soon as possible after the check engine light goes on. Even if your car appears to be all right, ignoring the problem could lead to engine failure or some other form of system failure. It is in your best interest to let experts determine the source of the problem, since the issue could be as minor as an improperly replaced gas cap or as complicated and as serious as engine or transmission malfunction.
Certified repair technicians have the knowledge and the resources essential to a proper diagnosis. 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.
Absolutely do not take your car to an auto parts store for a diagnosis when your check engine light goes on. They are able only to read your trouble codes, not to diagnose or perform repair work. Stick with the experts.