The check engine light came on, so I took to Autozone and they read the code PO440. I had to replace the gas cap cause the solenoid had cracks in it. The light went off for about 2 months. The light came back on so I took it to Autozone and it read the same code. I had to replace the battery today, could that have trigger the check engine light come on?
P0440 EVAP mulfunction , EVAP valve or hoses leak
SOURCE: transmission solenoid
See page 12
http://www.autoshop101.com/forms/h17.pdf
You need work space, tools and some previous experience to do this repair.Its better to take it to an authorized local service station.
SOURCE: Car/1990 Toyota Corolla
An oil fouled spark plug indicates an engine with
worn piston rings and/or bad valve seals, allowing excessive oil to
enter the chamber..you need to change the piston rings....
Good luck...
SOURCE: toyota seinna po440, po441, po446
you have to understand that there is a leak in the system other than the gas cap for the evaporative system. The system needs to be professionally closed, and smoke introduced into to find the leak, and a through component check, eg.. purge valve vapor canister vent solenoid all functioning correctly
SOURCE: P0741 torque converter stuck off code
firstly it could be that the check engine light is mal-functioning or not. why not drive it as they said and if after that its still on get back to us.
Testimonial: "This is very helpful information. I just would like to know, once the cycles completes will the check engine go out on its own or not?"
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I had to get the gas cap replaced, because it had tear in the rubber solenoid. The check engine light came back on after about 2 months. I took it back to Autozone to read the codes and it came back with the same come code PO440. I had it reset, and it came back on but the battery had a small cut in the negative terminal. I took it back to Autozone and replaced it, because the battery was bad. Of course after disconnected the battery the check engine light went off. My battery was bad when I had it tested at Autozone. I had a new battery put in. My question was the battery the cause for the check engine light to come back on?
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