Gm code p0446

Chevy / GMC - P0446 EVAP System Vent Performance Problem - YouTube

Hello Catherine, Code P0446 - EVAP Emission System ( Vent Control Circuit)For more info follow the link below. https://www.2carpros.com/questions/kia-sorento-2004-kia-sorento-check-engine-code-p0446

You have an Evap System problem and yes, this can cause poor gas mileage. Possible causes are:

• Plugged vapor canister
• Faulty vent solenoid
• Pinched or blocked EVAP hose
• Faulty FTP sensor

YOU REPLACED PARTS FOR NOTHING ! P0446 Chevrolet Evaporative Emission Vent System Performance Chevy Impala Check Engine Light Codes P0446 P0451 EVAP Trouble HERE WATCH A REAL TECH.

Google your codes

TYPE: OBD & your codes

OBD PO446

Evap System Vent Control Circuit Malfunction

Why--have to do the proper testing of the system
solenoids & valves & hoses to tell that

Google your PO446 Code & read up on the fault code


Codes have nothing to do with parts or the need to replace any

Type:OBD P0446

The definition for that code is : P0446 - Evaporative Emission Control System Vent Control Circuit Malfunction

When I get this code on my Ford Escape it is the gas cap not being on properly to get a good seal. Double check the gas cap or replace it with a new one and have the code cleared.

po305 is related to missfire on #5 cylinder
po440 is related to fuel tank pressure
pO441 is for evaporator purge flow malfunction
po446 relates to vent control valve electrical circuit malfunction

missfire is seperate from the other codes
as for the other three codes replace the vent control valve solenoid located near the charcoal canister the oth3er codes can relate to a faulty solenoid

after replacing light will only go out if you clear through a scan tool or three drive cycles of over 10 min each

the code p0446 is refer to evap vent valve , maybe is disconnect

p0446 is an evap code for incorrect purge flow, check the rear vacume switching valve. its above the rear sub frame