Q&A

Last year when I was parked on an incline, with about 1/4 tank of gas, my guage went to empty. As I drove away, my check engine light went on. It went off a couple days later but returned a couple days after that. Since then, my gas guage has not worked. Even when I have the tank full, any time I am stopped and idling, the guage goes to empty. More importantly, I had the check engine diagnosed. They stated it was a vapor canister valve. I am not sure of the code, but I thought it was a Po440. Do I just need to change the vapor canister, or with the gas guage doing this odd behavior, could it be something else to?