Go Right to the Experts When Your Check Engine Light Goes On
Does your stomach drop when your check engine light goes on. Your cars on board computer continuously monitors its systems; warning lights like the check engine light go on whenever the computer receives a signal that something is amiss. 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.
Experts strongly recommend that you have your car checked by a certified repair technician as soon as possible whenever your check engine light goes on. Ignoring the problem could lead to engine failure or some other form of system failure, even if your car appears to be operating normally. 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.
A certified repair technician has the knowledge and the access to equipment essential to a proper diagnosis of your problem. Examples of issues that demand a quick and proper diagnosis include sudden illumination of 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. Stay with the experts.