P0446 Toyota -2003 corolla also getting p0440

Question

I'm getting P0440 and P0446 simultaneously. Have replaced gas cap, fill tube, hoses to tank and canister. Also tested 3 VSV's with 12V. All to no avail. The only thing left that I can think of is the vapor canister, but I don't want to throw money at it unless I can confirm that's what it is. Any other ideas?

Answer 1

Hi there,

If you have a scan tool that can read live data then you could check the vapor pressure sensor. If it's not reading properly you will get this code even when the system is working properly. If the sensor is working properly, then the next step would be to have a smoke test done to locate the leak.