Ok so as i turned my car on the check engine light started to flash. Pop the hood and i realize my spark plug wire wasnt on one of the plugs. I put it back on and the light stopped flashing. But the light is still there and when i scanned for codes, it said no communication? What does this mean??

 

Check the cig light fuse. It supplies power to the connector.

 

i agree. the cig lighter supplies power to the obd port.