engine light came on while driving on 2006 Ford Fusion

checked the gas cap and it was not loose am thinking that it may be in the emission system

1 answer 3 comments
YOU NEED TO SCAN CODES AND WE WILL ADVISE
I would love give that to you but don't own a obd 2 tester to find out. the car is not running bad
and can you clean the O2 sensors?
go to auto zone and they will give you the code
its was 3 sensors 2-O2 sensors and the temp sensor