Great info friend, I have this exact code and will go from there to fix it. Thxdisallow wrote:Evap leak refers to your evap system. It prevents fuel from evaporating and escaping the fuel system. It has a series of valves, hoses, and a canister that sits in your rear driverside bumper which captures the evaporated fuel.
This system also helps control fuel going into the tank. I have a bad vent control valve, which helps prevent fuel from spilling when you are topping off. This is the reason manufacturers always ask you not to top off.
When I fill my truck, and top off the tank, it really doesn't allow me to do this without spilling fuel all over the place. I have a replacement valve sitting in the center console, but have never gotten around to replacing it.
Because this valve is malfunctioning, I get both P1446 Evap system Leak detected and P0440 Gross Evap System leak codes, and drive around with my SES light on most of the time. I check the codes every so often to ensure something else hasn't popped up, so far so good.
I really need to get to fixing that! But the code has been there for the last 5 years or so, and hasn't caused any issues. We don't get smog checked here, if you are in an area that does, having a SES light will cause you to fail smog.