Hello:
I am a new member and so excited that this forum is available to help the helpless, like me.
I was driving on the Parkway and my check engine light came on. Was too far from Toyota Dealer. Went to Autozone and got this diagnostic code PO440. He tightened my gas cap. Said I need to turn it around to hear the click three times. He did that. My light is now off. Can't imagine how much the dealer would have charged me. What do you think? Was the diagnostic at Autozone correct?...

irahs