Welcome to the North American Subaru Impreza Owners Club Tuesday January 26, 2021
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 09-03-2015, 11:35 AM   #1
korinthia
Scooby Newbie
 
Member#: 389642
Join Date: May 2014
Chapter/Region: MWSOC
Vehicle:
2008 WRX STI
DGM

Default Bizarre OCV issues. Help! P2092 and P2088

The background may or may not be important feel free to skip.

Brackground:I have a 2008 STI, dropped a new block into it 8k miles ago and the thing had a nasty oil leak ever since, and an intermittent gas leak. I had fixed the gas leak in the past by tightening the hose clamps under the manifold. After a while the leak came back and the clamps were still tight, so I said screw it I am tired of screwing with this and pulled the manifold and installed Aeromotive fuel rails, lines, and an Aeromotive A1000-6 FPR, and look around for the source of the oil leak and find nothing. Put the car back together, get a new tune, car runs great. I do some research and see that hairline cracks in the AVCS line are common, so I decide that must be the issue and order the IAG replacement. So three weeks later I pull the manifold again (FML) and I come to find out that like an idiot I had forgotten one crush washer on the AVCS line banjo going into the head right in front of the turbo. I had already bought IAG's AVCS line replacement, so I decided to go ahead and use it instead of just putting in the missing washer, flexible more durable etc. etc.

TL;DR: I pull the intake manifold, install fuel rails, lines, fpr, reassemble car runs great. Pull the manifold again 3 weeks later replace AVCS/turbo feed line, and install 8mm phenolic spacers.

Problems begin: On my way home from installing the AVCS line I get a CEL, p2092 OCV (OCV Solenoid Valve Signal A Circuit Open (Bank 2)). I clear the code and things are fine for a day or so of regular driving and it eventually comes back. I do some research and see that its an electrical issue and poke around my engine bay and find a loose ground. I tighten it and clear the code, and have no problems for a week until last night when as I am coasting to a stop light I get another CEL p2088, same code opposite side (Bank 1). So I pull over and clear the code, pull back onto the road and it throws the code again almost immediately. The car feels rough under 3k RPMs but the A/F ratio remains good.

I find it extremely odd that I would have the same code on both sides, I didnt unplug either of the AVCS solenoids when I removed the IM on either occasions, and I never had any issues before replacing the oil line (and fixing the leak subsequently). I've talked to my tuner and he was as stumped as I am, any help would be appreciated.
* Registered users of the site do not see these ads.
korinthia is offline   Reply With Quote
Sponsored Links
* Registered users of the site do not see these ads.
Old 05-30-2019, 11:53 AM   #2
ModernEtho
Scooby Newbie
 
Member#: 488699
Join Date: Jul 2018
Default

Quote:
Originally Posted by korinthia View Post
The background may or may not be important feel free to skip.

Brackground:I have a 2008 STI, dropped a new block into it 8k miles ago and the thing had a nasty oil leak ever since, and an intermittent gas leak. I had fixed the gas leak in the past by tightening the hose clamps under the manifold. After a while the leak came back and the clamps were still tight, so I said screw it I am tired of screwing with this and pulled the manifold and installed Aeromotive fuel rails, lines, and an Aeromotive A1000-6 FPR, and look around for the source of the oil leak and find nothing. Put the car back together, get a new tune, car runs great. I do some research and see that hairline cracks in the AVCS line are common, so I decide that must be the issue and order the IAG replacement. So three weeks later I pull the manifold again (FML) and I come to find out that like an idiot I had forgotten one crush washer on the AVCS line banjo going into the head right in front of the turbo. I had already bought IAG's AVCS line replacement, so I decided to go ahead and use it instead of just putting in the missing washer, flexible more durable etc. etc.

TL;DR: I pull the intake manifold, install fuel rails, lines, fpr, reassemble car runs great. Pull the manifold again 3 weeks later replace AVCS/turbo feed line, and install 8mm phenolic spacers.

Problems begin: On my way home from installing the AVCS line I get a CEL, p2092 OCV (OCV Solenoid Valve Signal A Circuit Open (Bank 2)). I clear the code and things are fine for a day or so of regular driving and it eventually comes back. I do some research and see that its an electrical issue and poke around my engine bay and find a loose ground. I tighten it and clear the code, and have no problems for a week until last night when as I am coasting to a stop light I get another CEL p2088, same code opposite side (Bank 1). So I pull over and clear the code, pull back onto the road and it throws the code again almost immediately. The car feels rough under 3k RPMs but the A/F ratio remains good.

I find it extremely odd that I would have the same code on both sides, I didnt unplug either of the AVCS solenoids when I removed the IM on either occasions, and I never had any issues before replacing the oil line (and fixing the leak subsequently). I've talked to my tuner and he was as stumped as I am, any help would be appreciated.
Did you find what caused this? I have the same two codes and can't find anything on having both OCV codes.
ModernEtho is offline   Reply With Quote
Old 01-03-2021, 04:51 AM   #3
3-MPG
Scooby Newbie
 
Member#: 517482
Join Date: Aug 2020
Default

Curious what the fix was
3-MPG 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 11:06 PM.


Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2021, Jelsoft Enterprises Ltd.
Powered by Searchlight © 2021 Axivo Inc.
Copyright ©1999 - 2019, North American Subaru Impreza Owners Club, Inc.

As an Amazon Associate I earn from qualifying purchases.