Post by
VStar650CL »
https://forums.nicoclub.com/vstar650cl-u299034.html
Sun Feb 21, 2021 5:30 pm
P1446 basically means a restriction, usually a dead vent solenoid. Here's what Identifix suggests (and I agree) since it didn't fix it:
1. Check the Evap control system pressure sensor voltage key on engine off to be about 2.9 volts, remove the gas cap and verify that the 2.9 is atmospheric pressure. Then test drive the vehicle and verify the Evap control system pressure sensor voltage is the same when coming back to a stop and idling as it was key on engine off.
2. If the pressure sensor voltage was lower than 2.9 volts, check for a restricted canister. If not, start at the vent solenoid and work forward removing EVAP hoses until the pressure sensor voltage goes up. When the voltage goes up, the restriction is found.