Google the code and you will have the answer.
The code PO441 means that the vehicle has an incorrect purge flow. The code PO446 is for the vsv vapor pressure sensor.
po446 is a large evap. system leak some times cause by leaving vehicle running while fueling up, or leaving cap off or loose after gassing up.
Evaporative Emission Control system vent control Circuit po446 code
Remove the negative battery cable for 6 minutes and then replace.
ow do you find out where the parts are on a 2001 silverado for the emission control system
PO446 code isÊa diagnostic code for Evaporative Emission Control System Vent Control Circuit.Ê The most common fix for this code is to replace the gas cap and make sure it is turned till you hear a click.
Check your charcoal fuel canister. I had the same problem changed the light went out. The problem fixed.
P0446=EVAP Emission Control System Vent Circuit Malfunction.
change the sencer related to the code and reset the computer problem solved drive safe
Evaporative emission control system / Vent control circuit malfunction. Don't ask me how to fix it, I got this from the Haynes Repair Manual.
I ran a smoke test and found that the vapor canister had a leak at the seem. I put sealer on the seem and solved the problem no more po446 code!