The check engine light is part of the onboard diagnostic system, or OBD, and is reserved for problems that may have an effect on the vehicle emissions systems
. When the electronic-control system finds a problem it cannot adjust, the OBD turns on a yellow warning indicator and stores a trouble code in its memory. These diagnostic trouble codes (DTC) help identify the source of the problem which can be read with a scan tool or diagnostic computer.
What’s The Problem?
It’s easy to confuse the Check Engine light with maintenance reminders or service interval light on your dashboard. These lights illuminate when a routine service is due. However, if the Check Engine Light illuminates, it will either blink or remain constant, depending on the problem. If the light is steady it typically means the problem is not an emergency, but you should schedule an appointment with Master Automotive Centers
as soon as possible.
A blinking light typically signifies a severe engine misfire allowing unburned fuel to be dumped into the exhaust system. There it can quickly raise the temperature of the catalytic converter to a point where damage is likely, requiring an expensive repair.