Welcome to the North American Subaru Impreza Owners Club Friday June 24, 2022
Home Forums Images WikiNASIOC Products Store Modifications Upgrade Garage
NASIOC
Go Back   NASIOC > NASIOC Technical > Factory 2.5L Turbo Powertrain (EJ Series Factory 2.5L Turbo)

Welcome to NASIOC - The world's largest online community for Subaru enthusiasts!
Welcome to the NASIOC.com Subaru forum.

You are currently viewing our forum as a guest, which gives you limited access to view most discussions and access our other features. By joining our community, free of charge, you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is free, fast and simple, so please join our community today!

If you have any problems with the registration process or your account login, please contact us.







* As an Amazon Associate I earn from qualifying purchases. 
* Registered users of the site do not see these ads. 
Reply
 
Thread Tools Display Modes
Old 01-14-2022, 10:22 PM   #1
97 Pimpreza
Scooby Specialist
 
Member#: 123693
Join Date: Aug 2006
Chapter/Region: MWSOC
Location: Chicago, IL
Vehicle:
2011 WRX Hatch
DGM

Exclamation P045x EVAP system code? This may help. Fuel tank pressure sensor location.

I've read a number of OLD posts looking for the physical location of the fuel tank pressure sensor for various models (foresters, WRXs, etc.) while trying to troubleshoot a P045x code (P0453 in my case) and no one ever seems to have found it.

I FOUND IT! And I would imagine its in a similar spot on other models

It is located on the rear passenger side above the upper control arm. if you have skinnier arms you can just reach it.

If I solve my P0453 code I will post my solution. Fingers crossed.

Hope this information is of use to someone since it really would have helped me when I started to off-and-on look for this thing days ago since all diagrams in the manual are SO vague about its location.

Best I can do until I can get my img.nasioc.com account working is this imgur link (you're on your own to get it working though. on PC you can highlight the link and right click then "go to 'url' ")

https://imgur.com/gallery/5PT3lts

[pictures coming soon.... STILL having issues]
* Registered users of the site do not see these ads.

Last edited by 97 Pimpreza; 01-22-2022 at 12:32 AM. Reason: added imgur link
97 Pimpreza is offline   Reply With Quote
Sponsored Links
* Registered users of the site do not see these ads.
Old 01-15-2022, 06:37 PM   #2
97 Pimpreza
Scooby Specialist
 
Member#: 123693
Join Date: Aug 2006
Chapter/Region: MWSOC
Location: Chicago, IL
Vehicle:
2011 WRX Hatch
DGM

Default

Update: Following the service manual, I checked the EVAP_VP (vapor pressure) numbers which should read less than 7.95 kPA with the sensor plugged in (it was reading 8.035 kPa). Then unplugged the tank pressure sensor and checked the readings again and got 8.191 kPa. Per the Subaru service manual this means I have a short somewhere between the tank pressure sensor and ECM. This is going to be fun to fix....

Oh and still having issues adding pictures (img.nasioc.com is refusing to send a confirmation email.....)

Last edited by 97 Pimpreza; 01-15-2022 at 06:44 PM.
97 Pimpreza is offline   Reply With Quote
Old 01-16-2022, 07:02 PM   #3
97 Pimpreza
Scooby Specialist
 
Member#: 123693
Join Date: Aug 2006
Chapter/Region: MWSOC
Location: Chicago, IL
Vehicle:
2011 WRX Hatch
DGM

Default

P0453 Update/possibly solved?:

Checked for a short between the fuel tank pressure sensor and ECU.... None found.

Sprayed out the connectors for the fuel tank pressure sensor with contact cleaner and reattached everything.

Took it for a test drive (about 10 miles) and the code hasn't come back yet. It was reappearing within 5 miles before so possible issue was a bad contact (assuming it doesn't come back again)?

Also checked the EVAP_VP numbers again and was reading 15+ kPA. This should be an issue according to the service manual, but no check engine light or codes are present so I'm really not sure what to believe at this point..... EVAP problems suck.



STILL trying to get pictures loaded up here in case anyone needs to find the tank pressure sensor.
97 Pimpreza is offline   Reply With Quote
Old 01-22-2022, 12:37 AM   #4
97 Pimpreza
Scooby Specialist
 
Member#: 123693
Join Date: Aug 2006
Chapter/Region: MWSOC
Location: Chicago, IL
Vehicle:
2011 WRX Hatch
DGM

Default

5 days later and still no CEL or code returning so if anyone gets a P0453 like I did, try cleaning the contacts on your fuel tank pressure sensor before diving super deep into the issue and replacing expensive EVAP bits. I think this is the last of my updates until I FINALLY get pictures working and/or the code returns. Hope this info can be of use to someone at some point. If not I'm just talking to myself on a forum.
97 Pimpreza is offline   Reply With Quote
Old 01-23-2022, 03:51 PM   #5
Max Capacity
Scooby Specialist
 
Member#: 149347
Join Date: May 2007
Chapter/Region: NESIC
Location: Tolland, CT
Vehicle:
05 LGT ,09 SpecB
Black/silver

Default

Let's hope dirty connectors is the simple fix. Kind of chasing the same issue on my 05 Legacy GT wagon.

I've has P0442 and P0457

This may help someone...

https://legacygt.com/forums/showthre...ak-286916.html
Max Capacity is offline   Reply With Quote
Old 01-29-2022, 07:34 PM   #6
97 Pimpreza
Scooby Specialist
 
Member#: 123693
Join Date: Aug 2006
Chapter/Region: MWSOC
Location: Chicago, IL
Vehicle:
2011 WRX Hatch
DGM

Default

Quote:
Originally Posted by Max Capacity View Post
Let's hope dirty connectors is the simple fix. Kind of chasing the same issue on my 05 Legacy GT wagon.

I've has P0442 and P0457

This may help someone...

https://legacygt.com/forums/showthre...ak-286916.html
Fingers crossed for ya. I feel there should be a dedicated thread to EVAP codes and fixes on here. They are a pain to figure out and the info is so scattered its really hard to figure out what to check. Put close to 200 miles on my WRX since the code was cleared last and so far so good.
97 Pimpreza is offline   Reply With Quote
Old 01-30-2022, 03:04 PM   #7
Max Capacity
Scooby Specialist
 
Member#: 149347
Join Date: May 2007
Chapter/Region: NESIC
Location: Tolland, CT
Vehicle:
05 LGT ,09 SpecB
Black/silver

Default

My car is going back to the Tech at the local shop on Wed. I talked with him the other day, he is well-trained on the EVAP systems. I'll try and remember to post an update when I have one.
Max Capacity is offline   Reply With Quote
Old 02-03-2022, 03:45 PM   #8
Max Capacity
Scooby Specialist
 
Member#: 149347
Join Date: May 2007
Chapter/Region: NESIC
Location: Tolland, CT
Vehicle:
05 LGT ,09 SpecB
Black/silver

Default

Just stopped by the repair shop. The smoke test showed a leak at the grommet where a nipple and hose go through the body. The pieces were pretty much shot. He's replacing those and will re-smoke test.
Max Capacity is offline   Reply With Quote
Old 02-05-2022, 09:53 PM   #9
97 Pimpreza
Scooby Specialist
 
Member#: 123693
Join Date: Aug 2006
Chapter/Region: MWSOC
Location: Chicago, IL
Vehicle:
2011 WRX Hatch
DGM

Default

Quote:
Originally Posted by Max Capacity View Post
Just stopped by the repair shop. The smoke test showed a leak at the grommet where a nipple and hose go through the body. The pieces were pretty much shot. He's replacing those and will re-smoke test.
Good to hear you may have found the problem! Post an update if that was the fix!
97 Pimpreza is offline   Reply With Quote
Old 02-06-2022, 12:51 PM   #10
Max Capacity
Scooby Specialist
 
Member#: 149347
Join Date: May 2007
Chapter/Region: NESIC
Location: Tolland, CT
Vehicle:
05 LGT ,09 SpecB
Black/silver

Default

I'm taking the car to VT today, hoping no more CEL. It will have over 300 miles in the next couple of days...I'll be and post an update if it comes back.
Max Capacity is offline   Reply With Quote
Old 03-07-2022, 07:26 PM   #11
Max Capacity
Scooby Specialist
 
Member#: 149347
Join Date: May 2007
Chapter/Region: NESIC
Location: Tolland, CT
Vehicle:
05 LGT ,09 SpecB
Black/silver

Default

Back in VT today, car runs and works great. Even rolled 302,000 miles on the drive up. The engine has almost 150,000 trouble free miles. The car was dynoed with a vf52 back in Aug 2011, I installed the ej257 May 20 2012 at 154,000 miles on the car.
Max Capacity is offline   Reply With Quote
Old 05-02-2022, 11:36 PM   #12
sabyjoe
Scooby Newbie
 
Member#: 208050
Join Date: Apr 2009
Default Fuel fill up issue

Were you able to refuel with the P0453code? Im getting fuel kick back in attempting to fill-up.
sabyjoe is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not 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
Forum Jump

All times are GMT -4. The time now is 06:01 PM.


Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2022, Jelsoft Enterprises Ltd.
Powered by Searchlight © 2022 Axivo Inc.
Copyright ©1999 - 2019, North American Subaru Impreza Owners Club, Inc.

As an Amazon Associate I earn from qualifying purchases.