A flashing check engine light is a serious issue that should not be ignored. It indicates that there is a problem with the vehicle that needs immediate attention. A flashing check engine light is usually correlated with engine misfires, which means that the engine is dumping uncombusted fuel into the cars exhaust system. This can quickly raise the temperature of the catalytic converter, which can sustain damage and require costly repairs. There are three main reasons why engines may misfire: defects in the ignition system, a faulty fuel system, or an internal engine problem.

If the check engine light starts flashing, it is not a good idea to continue driving the vehicle. Continuing to drive with a flashing check engine light can cause serious damage to different engine components, and might even lead to more serious and costly problems such as a blown catalytic converter. The hazards of avoiding the check engine light might mean paying thousands of dollars more than necessary for long-term damage incurred on the vehicle.

The check engine light illuminates when there is a problem with the vehicle, and a diagnostic test at a mechanics is the only way to figure out what is wrong. If the check engine light is flashing, it is recommended to get to the nearest trustworthy mechanic as soon as possible.