My car has code P0440 for a while. It CEL used to come on after about 300 miles after reset the OBD2 but the computer was still not ready for the emission test. I changed some cracked hoses from at the purge solenoid and the computer was set and it passed the emission. However, the code came back again after it passed the emission test and the CEL turned on so quick after resetting the OBD2. I checked both purge solenoid and VCV valve and they were both good as their resistance is about 33 ohm and they both open and close when applying and removing voltage at their terminals. Vacuum check of the hose from VCV valve at canister to the purge solenoid shown no leak. What is the possible cause that I need to check? I have not checked the canister and I am not sure how to check it. I checked the VCV valve by accessing the valve through the rear wheel.

 

Can be many things but it will probably be the canister in the end.




Look at this video and then hit related in you tube

Good luck

 

ALOT ALOT of threads were opened about this issue man. use the search button, thats what its there for!

 

http://www.obd-codes.com/p0440

 

alot of threads about it but havent found a one correct solution to it. all varies from the inexpensive gas cap to the i dont to pay for a charcoal canister.

 

I did a lot of research and they helped me to do all the troubleshoot to narrow down no issue at Purge sonenoid, VSV or hoses. Have not found any article showing to troubleshoot charcoal canister or pictures to remove it.

 

if im not mistaken, its near the gas tank. put the car on a lift for easier access. think ive seen a youtube video. keep us updated yah