The EVAP, or Evaporated Emissions Control System, is responsible for making sure that no gasoline fumes escape into the earth’s atmosphere from the gas tank or fuel system. While not a glamorous job, it’s certainly a job that Mother Nature would endorse.
While preventative maintenance on your EVAP system is unlikely, there are instances where faults in the system could result in your “Check Engine Light” being illuminated on your dashboard. Common problems include issues with the purge valve, which is responsible for venting the fuel vapors from the engine. Your vehicle may also be experiencing leaks in other vents and vacuum hoses throughout the system, or something as simple as a missing gas cap.