Here are some of the possible causes of a blinking or flashing check engine light:
* Spark plug misfire
* Fuel injector failure
* Ignition coil failure
* Vacuum leak
* Mass air flow sensor failure
* Oxygen sensor failure
If you see a blinking or flashing check engine light, it is important to have your vehicle diagnosed and repaired as soon as possible. Driving with a misfiring engine can damage the catalytic converter and cause it to fail. This can lead to expensive repairs.