Subaru EVAP Drain Valve | P0447 P0448 P1443

Today we're looking at an EVAP Drain Valve. The Drain Valve is an emission control device. The Drain Valve simply controls the ambient air to be introduced to the EVAP canister. (A link on how to remove the evap canister is listed below.) The drain valve shown is from a 2010 Subaru Impreza.

A number of trouble codes are deal with the evap drain valve, included:
P0442 - Evaporative Emission Control System Leak Detected (Small leak)
P0447 - Evaporative Emission Control System Vent Control Circuit Open
P0448 - Evaporative Emission Control System Vent Control Circuit Shorted
P0456 - Evaporative Emission Control System Leak Detected (Very small leak)
P0457 - Evaporative Emission Control System Leak Detected (Fuel cap loose or off)
P1443 - Vent Control Solenoid Valve Function Problem

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►► EVAP Canister :    • Subaru Impreza Canister Replacement |...  

Chapters:
0:00 - Where is the evap drain valve
1:57 - Removing evap drain valve
3:02 - Testing drain valve
7:19 - Wrap up and reinstallation

EVAP Drain Valve Operating Conditions:
Battery voltage - 10.9v
Atmospheric pressure - 75kPa
Total time of canister purge - 120 seconds
Engine speed - 1050 - 6000 rpm
Fuel tank pressure: -4kPa
Intake manifold vacuum: -26.7kPa
Vehicle speed - At least 20MPH
Fuel level - 2.54 gallons or 9.6 liters
Fuel temperature - 14-113 F
Intake air temperature - 14F and above
Air fuel ratio - .76 - 1.25

Note:
Any attempt to repair automotive parts and/or systems carries risk of personal injury. Always adhere and follow safe practices when working on vehicles. Such as, safety glasses, jack stands, no loose clothing, etc. No guarantee or warranty is implied. Use the information in this video at your own risk. Carsntoys is a member of the Amazon Influencer Program.

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