P0446 Emission Control System Code

[ochoam]

I have a P0446 code that I am unable to resolve. P0446 Evaporative Emission Control System Vent Control Circuit Malfunction.

Looking at other resources the code points to the vent valve solenoid. I confirmed the 20A fuse is in place and that the connector for the vent solenoid is receiving 12volts when the key is in the 'on' position. I did not see any obvious holes in the hose or connecter wires, but there was considerable rust and debris around (located in the midwest).

After replacing the vent valve solenoid, I am still receiving a P0446 check engine code.

Any help is appreciated, thank you.

 

[ochoam]

Attached is the code readout

 

[ochoam]

My code will only come on occasionally, but due to the amount of charcoal that came out when I changed the valve I'm going to replace the canister as well.

Also never knew gas levels cause your emission system to check more/less frequently.

 

[ochoam]

Replacement OEM canister from a Ford dealer was also leaking charcoal out of the box. Sounded like gravel wis in the box when I picked it up initially.

Round 2 of ordering a replacement will be with Rockauto.

Anyone have a 'fix' for charcoal coming out of the canister?