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 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.
Should you see this light in your vehicle, our ACE certified technicians will inspect the EVAP system as part of an engine diagnostic.
Common EVAP System Check Engine Light Codes
- P0456 - EVAP system very small leak detected
- P0455 - EVAP system gross leak detected
- P0442 - EVAP system small leak detected
- P0440 - EVAP system malfunction
- P0443 - EVAP system purge control valve circuit / flow
- P0441 - Incorrect purge flow
- P0446 - EVAP system vent control fault
- P0457 - EVAP system leak detected (fuel cap or canister)
- P0452 - EVAP system pressure sensor low input
- P0496 - EVAP flow during non-purge
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