Hello folks,

I have a 2001 SL500 with a recurring P0440 code. I bought two gas caps already and the code continues to return, so I figure it's not the gas cap. Inside the engine bay, the MOT valve looks fairly new to me, so I don't believe it's that either (though can't rule it out).

Engine runs fine, of course. No other codes.

I don't have much/any experience with evap codes... can anyone help steer me in the right direction?