Where is the EVAP vent control valve located?
Where is the EVAP vent control valve located?
(Tech Tip- The EVAP vent control valve is usually located under the car in the rear of the vehicle by or attached to the charcoal canister.) Verify with no power or ground supplied that you can blow through the valve’s openings. (If you can’t blow through the openings, the valve is stuck closed and needs to be replaced.)
What is the trouble code on my Chevy Silverado?
P0446 Chevy Silverado. March 6, 2019August 7, 2018. One of the most common trouble codes with the Chevy Silverado is the P0446 code. This trouble code references a number that is given to you when you plug your Silverado into a OBDII scanner. P0446 Indicates that there is a fault in the evaporative emission control system.
How is the vent control valve in a car controlled?
The vent control valve is controlled by the engine control module (ECM) and allows air to flow into the charcoal canister to purge the gas vapors into the engine air intake to be burned. The flow of the gas vapors from the charcoal canister to the engine air intake is controlled by a purge valve.
What happens to the ECM when the car is turned off?
However, the ECM occasionally performs leak tests to ensure the evaporative emission control system is working properly when the vehicle is turned off. During the leak test, the ECM closes the vent control valve to create a sealed EVAP system.
What is the code for the EVAP vent?
The evap vent valve in most makes and models depends on a supply of a 12V battery voltage with key on. The ECM driver closes this valve when grounded and will set code P0446 if there is an open or short to ground or battery voltage or it is not possible to form a vacuum seal.
P0446 Chevy Silverado. March 6, 2019August 7, 2018. One of the most common trouble codes with the Chevy Silverado is the P0446 code. This trouble code references a number that is given to you when you plug your Silverado into a OBDII scanner. P0446 Indicates that there is a fault in the evaporative emission control system.
Why does my Chevy Silverado have a gas smell?
P0446 may also cause a slight gas smell. This is due to it being related to the system that deals with fuel vapors. P0446 is a universal OBDII trouble code. This means that regardless of which make or model of vehicle, the code will mean the same thing (Silverado or not). The code technically stands for:
What to do if you have a vent valve problem?
Check the specifications in the manual for your vehicle make, year model and engine build before attempting to test or repair vent valve control or power circuits, the vent valve or a faulty powertrain control module. Some fixes may not require replacement parts.
