What are these codes Yaris sedan is throwing?

[detroiter]

Someone I know that has a 2007 Yaris sedan (they bought one of the first ever sold here in MI!) is having a few codes that keep coming and going, making the check engine light come on...but the car runs fine. Could anyone tell me what these codes are?

aa1..aa2..aa3..aa4

p2419, p043f, p043e, p2402

[WeeYari]

Issues with the charcoal evap canister.

[CTScott]

P2419: Evaporative Emission System Switching Valve Control Circuit Low

P043F: Evaporative Emission System Reference Orifice High Flow

P043E: Evaporative Emission System Reference Orifice Clog Up

P2402: Evaporative Emission Leak Detection Pump Stuck ON


So, it looks like he/she has the water logged emissions canister due to the TSB about the bad fuel filler pipe flap:

49192