Welcome to the North American Subaru Impreza Owners Club Saturday December 20, 2014
Home Forums WikiNASIOC Products Store Modifications Upgrade Garage
NASIOC
Here you can view your subscribed threads, work with private messages and edit your profile and preferences Home Registration is free! Visit the NASIOC Store NASIOC Rules Search Find other members Frequently Asked Questions Calendar Archive NASIOC Upgrade Garage Logout
Go Back   NASIOC > NASIOC Technical > Service & Maintenance

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.
* Registered users of the site do not see these ads.
Reply
 
Thread Tools Display Modes
Old 11-07-2006, 03:57 PM   #1
hulkSTi
Scooby Newbie
 
Member#: 96355
Join Date: Sep 2005
Chapter/Region: South East
Vehicle:
2005 STi
OBP

Default p2096

got the cel p2096 Post Catalyst Fuel Trim System Too Lean Bank 1

how do i fix this?

thanks for any help
* Registered users of the site do not see these ads.
hulkSTi is offline   Reply With Quote
Old 11-08-2006, 10:55 PM   #2
ase05scooby
Scooby Newbie
 
Member#: 103710
Join Date: Dec 2005
Chapter/Region: South East
Location: canton
Vehicle:
05 impreza wrx
red

Default

Any mods done to the car.Could be several things Your rear oxygen sensor,mass air flow sensor, air intake temp sensor or coolant temp sensor.Take it to a shop and have them checks the values of the sensors compared to their actual values.

Last edited by ase05scooby; 11-08-2006 at 11:03 PM.
ase05scooby is offline   Reply With Quote
Old 11-08-2006, 11:41 PM   #3
North Ursalia
Miss You Mom
Oct 1940 - Feb 2008

Super Moderator
 
Member#: 809
Join Date: Jan 2000
Chapter/Region: NESIC
Location: NH, Land Of Many Trees
Vehicle:
2000 2.5 RS, '14 For
92 5MT SVX

Default

I'd check the code again- it doesn't come up at all that I can find.


Brian
North Ursalia is offline   Reply With Quote
Old 11-12-2006, 02:16 PM   #4
badtaste
Scooby Newbie
 
Member#: 116636
Join Date: Jun 2006
Chapter/Region: MWSOC
Location: ohio
Vehicle:
2003 impreza
black

Default

possibal bad converter
badtaste is offline   Reply With Quote
Old 11-13-2006, 09:22 AM   #5
hulkSTi
Scooby Newbie
 
Member#: 96355
Join Date: Sep 2005
Chapter/Region: South East
Vehicle:
2005 STi
OBP

Default

Quote:
Originally Posted by badtaste View Post
possibal bad converter
converter?
hulkSTi is offline   Reply With Quote
Old 11-13-2006, 11:45 AM   #6
Uncle Scotty
Scooby Guru
 
Member#: 16200
Join Date: Mar 2002
Vehicle:
OK Houston
we have an Uncle

Default

According to my '05 FSM....there are 12 steps---3 full pages of diagnostics for that code.

How well equipped are you to perform mechanical/electrical diagnostics???










Uncle Scotty is offline   Reply With Quote
Old 11-13-2006, 11:58 AM   #7
Jon [in CT]
*** Banned ***
 
Member#: 2992
Join Date: Nov 2000
Chapter/Region: NESIC
Location: Connecticut, USA
Vehicle:
02 WRX Sedan
Silver

Default

This code is frequently associated with trying to run a late model Subaru with the rear O2 sensor mounted in a spark plug anti-fouler.
Jon [in CT] is offline   Reply With Quote
Old 11-16-2006, 09:32 PM   #8
TMessick
Scooby Newbie
 
Member#: 882
Join Date: Feb 2000
Location: Michigan
Vehicle:
2004 WRX Wagon
very blue

Default

First off (and in general for anyone looking for help) please post your mods! Quite difficult (and a lot of guessing) if we don't know the hardware you're dealing with.

Highly reccomend finding someone with a Tactrix cable (or getting one yourself) and getting some logs. Uncle Scotty's kind of got the method to the madness of diagnosis (follow the SM).

In a generic sense, DS fuel trim lean (P2096) means that the control system couldn't get the downstream sensor down to the voltage it wanted, so the system is out of control. As such, you get a fault. COuld be a problem with the DS sensor reading incorrectly high (sensor/wiring problem, sensor out of exh stream) or a tune/HW issue where you're running a bit richer than the cal is set up for and the DS control is trying to pull out fuel to get you back to "normal" but runs out of authority.

Possible causes in order of SM diagnostic procedure) are:
2) rear O2 sensor reading stuck hi or offset (failed sensor or wiring, should be able to see it on logs)
3) rear O2 sensor offset hi/biased (failed sensor or wiring, should be able to see it on logs)
4) rear O2 sensor wiring failed between ECU and sensor signal (fix wiring)
5) rear O2 sensor signal reference offset (failed sensor, replace)
6) air leak in the exhaust near the front O2 or rear O2 is isolated (repair exhaust)
7) ??? not sure how an air leak would cause this, but a borked MAF might
8) high fuel pressure causing rich event
9) failed pressure regulator (see above)
... (I'm too lazy to check these, they are unlikely)

I'd say an aftermarket exhaust by itself is unlikely to cause this, but any of the various "CEL" fixes applied to the DS O2 _could_ be causing it.....

-T
TMessick is offline   Reply With Quote
Old 11-16-2006, 09:50 PM   #9
hulkSTi
Scooby Newbie
 
Member#: 96355
Join Date: Sep 2005
Chapter/Region: South East
Vehicle:
2005 STi
OBP

Default

Quote:
Originally Posted by TMessick View Post
First off (and in general for anyone looking for help) please post your mods! Quite difficult (and a lot of guessing) if we don't know the hardware you're dealing with.

Highly reccomend finding someone with a Tactrix cable (or getting one yourself) and getting some logs. Uncle Scotty's kind of got the method to the madness of diagnosis (follow the SM).

In a generic sense, DS fuel trim lean (P2096) means that the control system couldn't get the downstream sensor down to the voltage it wanted, so the system is out of control. As such, you get a fault. COuld be a problem with the DS sensor reading incorrectly high (sensor/wiring problem, sensor out of exh stream) or a tune/HW issue where you're running a bit richer than the cal is set up for and the DS control is trying to pull out fuel to get you back to "normal" but runs out of authority.

Possible causes in order of SM diagnostic procedure) are:
2) rear O2 sensor reading stuck hi or offset (failed sensor or wiring, should be able to see it on logs)
3) rear O2 sensor offset hi/biased (failed sensor or wiring, should be able to see it on logs)
4) rear O2 sensor wiring failed between ECU and sensor signal (fix wiring)
5) rear O2 sensor signal reference offset (failed sensor, replace)
6) air leak in the exhaust near the front O2 or rear O2 is isolated (repair exhaust)
7) ??? not sure how an air leak would cause this, but a borked MAF might
8) high fuel pressure causing rich event
9) failed pressure regulator (see above)
... (I'm too lazy to check these, they are unlikely)

I'd say an aftermarket exhaust by itself is unlikely to cause this, but any of the various "CEL" fixes applied to the DS O2 _could_ be causing it.....

-T
well i did just get a new TXS exhaust and i had to extend my o2 sensor wiring by about 5" to reach the o2 bung in the new exhaust. im hoping i have a loose wiring connection in there. makes sense. i didnt get this code until after i did the o2. it was about 4 weeks ago. i got the 1st cel a week ago

sorry, my mods are FP Green 50 Trim Turbo, Perrin FMIC, SMC meth kit, Perrin BIG MAF intake, Perrin 816cc modded injectors, Perrin Radiator Reservior, Tial Bov, Walbro Fuel Pump, Turbo XS 4" downpipe, Turbo XS racepipe, Turbo XS exhaust, Thermotec turbo wrap, Thermo-tec Cool Tube on I/C Pipe, Custom turbo heatshield, Heatwrapped downpipe, GFB Red pulley kit, Carbon Fiber radiator shroud, NGK Iridium colder plugs, Motul Race Oil, STi high pressure radiator cap, Apex-I AVC-R, Apex-I TT, HKS TT harness, Ecutek ecu custom street tune by Scott Siegel, monitored by Ecutuk Delta Dash Software.
hulkSTi is offline   Reply With Quote
Old 11-16-2006, 10:53 PM   #10
hulkSTi
Scooby Newbie
 
Member#: 96355
Join Date: Sep 2005
Chapter/Region: South East
Vehicle:
2005 STi
OBP

Default

Quote:
Originally Posted by Jon [in CT] View Post
This code is frequently associated with trying to run a late model Subaru with the rear O2 sensor mounted in a spark plug anti-fouler.
not running a plug anti-fouler
hulkSTi is offline   Reply With Quote
Old 11-17-2006, 12:06 AM   #11
Uncle Scotty
Scooby Guru
 
Member#: 16200
Join Date: Mar 2002
Vehicle:
OK Houston
we have an Uncle

Default

...it is possible that an exhaust leak would do this, too...
Uncle Scotty is offline   Reply With Quote
Old 11-17-2006, 09:19 AM   #12
hulkSTi
Scooby Newbie
 
Member#: 96355
Join Date: Sep 2005
Chapter/Region: South East
Vehicle:
2005 STi
OBP

Default

Quote:
Originally Posted by Uncle Scotty View Post
...it is possible that an exhaust leak would do this, too...
im going to check that this weekend. brand new gaskets for the entire exhaust system
hulkSTi 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

Similar Threads
Thread Thread Starter Forum Replies Last Post
P2096 code; anyone else get this??? riceburner22 Factory 2.5L Turbo Powertrain (EJ Series Factory 2.5L Turbo) 71 10-23-2009 12:09 AM
p2096, Any News? EXzacLEE Factory 2.5L Turbo Powertrain (EJ Series Factory 2.5L Turbo) 1 02-09-2006 04:26 PM
it safe to drive the car with this code P2096 Post Catalyst Fuel Trim System Too L TampaSTI Factory 2.5L Turbo Powertrain (EJ Series Factory 2.5L Turbo) 2 07-22-2005 12:54 AM
P2096 Post Catalyst Fuel Trim System Too Lean Bank ? TampaSTI Factory 2.5L Turbo Powertrain (EJ Series Factory 2.5L Turbo) 3 07-18-2005 06:46 AM
P2096, and a freaking out fiance' attitude Factory 2.5L Turbo Powertrain (EJ Series Factory 2.5L Turbo) 28 06-03-2005 12:02 PM


All times are GMT -4. The time now is 10:00 PM.


Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Powered by Searchlight © 2014 Axivo Inc.
Copyright ©1999 - 2014, North American Subaru Impreza Owners Club, Inc.