EVAP SYSTEM P0440

  • Tiny
  • Bcmullen95
  • 2003 TOYOTA COROLLA
  • 62,300 MILES

I would like to know how I can verify what can be wrong with the evap system. How can I test that the sensor is working properly, how can I check that the valves are working correctly, and how do I know that the EVAP canister is working properly?

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Thursday, December 8th, 2011 AT 5:18 PM

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  • Tiny
  • Fixitmr
  • MEMBER

Remove and reinstall the gas cap, clear the code, and drive for a day and see if the codes come back.
Inspect the EVAP system for cuts/holes in tubes/hoses
Inspect for damaged or disconnected hoses around the Evap purge solenoid
Check and/or replace the sensor
Check and/or replace the purge valve

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Thursday, December 8th, 2011 AT 5:30 PM

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