Vent Control Circuit Open - Subaru Outback - Subaru Outback Forums
LinkBack Thread Tools Rate Thread
post #1 of 2 (permalink) Old 12-26-2012, 10:45 AM Thread Starter
Registered User
Join Date: Dec 2012
Posts: 2
Feedback Score: 0 reviews
Vent Control Circuit Open

I recently bought a used 2001 Outback. Unfortunately, the Check Engine light had been entirely removed and it needed a few emissions parts to pass inspection. We replaced a knock sensor, evap valve, and put in a new check engine light. After doing that we figured out why someone removed the Check Engine light somewhere down the line. It has led us to our last code which says Vent control circuit open. Not sure of the number maybe p0447? The wiring harness tested fine about 3/4 of the way up to the computer in the front but we still have no idea where the fault is. Does anybody have any experience in dealing with this? It runs great, just need to get rid of this pesky electrical issue to get it inspected and on the road.

EvanF2132 is offline  
Sponsored Links
post #2 of 2 (permalink) Old 12-26-2012, 01:37 PM
Registered User
Join Date: Jun 2006
Location: Eastern ON Canada
Car: 07 OBW 2.5i D-4AT
Posts: 12,776
Feedback Score: 6 reviews
If the code is P0447, it's described as the vent circuit open, but it's referring to the "drain valve" at the evaporation emissions canister. The valve is opened and closed by the engine control module depending on the driving conditions and the various tests that are routinely done while driving. There are some checks that can still be done: See: how does, computer sees evap solenoid, including the link and attachment.

plain OM is offline  
Sponsored Links

Quick Reply

Register Now

In order to be able to post messages on the Subaru Outback - Subaru Outback Forums forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Please enter a password for your user account. Note that passwords are case-sensitive.


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:


Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.

Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Rate This Thread
Rate This Thread:

Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

For the best viewing experience please update your browser to Google Chrome