Remove the negative battery cable for 6 minutes and then replace.
The code PO441 means that the vehicle has an incorrect purge flow. The code PO446 is for the vsv vapor pressure sensor.
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!
Google the code and you will have the answer.
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
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.
Repairs for this will be covered for 36,000 miles or 3 years. These are codes set when there is a fuel vapor leak. Make sure your fuel filler cap is tight, clean, and sealed well, then drive for a few days and see if the light goes out before you bring it for repair.
Trouble code P0401 means: Exhaust Gas Recirculation Flow Insufficient Detected replace the EGR valve Trouble code P0446 means: Evaporative Emission System Vent Control Circuit
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