Awasome Most Common Reason Check Engine Light Comes On References. Carmd, an automotive telematics company, publishes an annual vehicle health index that compiles the 10 most common check. Web common check engine light causes.
Some cars measure how much pressure is building up inside your gas tank. A loose or damaged gas cap is one of the most common reasons for the check engine light to illuminate. If your check engine light is blinking, it could indicate a serious issue with your vehicle's engine.
