Read the trouble codes with an OBD2 scanner
Fix the underlying problem causing the light
Tighten or replace the gas cap
Check and replace faulty spark plugs or ignition coils
Repair vacuum leaks or damaged hoses
Replace a faulty oxygen sensor if needed
Check the catalytic converter if codes point to it
Repair wiring or connector issues
Clear the codes with an OBD2 scanner after repairs
Drive the vehicle to confirm the light stays off