Do any techs know the threshold (inHG) that triggers the C.E.L. for p0446 or know what the normal inHG is while driving and the puge is active. I had a p0446 code and had to change the canister and vent valve due to previous tech some place removing the filter then the canister and vent valve got plugged full of dirt and was throwing code for resticted evap. I installed new filter, canister, 2 way valve, vent valve, cleared codes and put a Napa vent valve on car and code came back ended up checking amp draw of old vent valve .45 amps and the check after market valve found it at .75 amps I installed OEM valve and cleared codes set monitors and drove 3 aditional times with no pending codes or mode 6 failures.