Check engine light is on what could it be

Hello, no, the fuel filter will not cause a check engine light to illuminate. What sensor are you meaning? There are dozens of potential causes for a check engine light to come on. Only diagnostic testing, hands on with proper equipment, is able to retrieve diagnostic trouble codes that have been set making the light illuminate. The codes can be used to begin troubleshooting routines to figure out the root cause of failure. Contact a shop near you for help: www.repairpal.com/repair-shops