Welcome to the North American Subaru Impreza Owners Club Thursday April 27, 2017
Home Forums WikiNASIOC Products Store Modifications Upgrade Garage
NASIOC
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 05-04-2009, 08:18 PM   #1
romer628
Scooby Newbie
 
Member#: 171091
Join Date: Feb 2008
Location: Buffalo, NY
Vehicle:
2006 Impreza 2.5i
Black

Default Cel - P0026, P0028, P0082, P0420

My car is currently throwing the following codes:

2006 Impreza 2.5i - Stock
Mileage - 120,000

Codes:
P0026 - Intake Valve Control Solenoid Circuit Range/Performance (Bank 1)
P0028 - Intake Valve Control Solenoid Circuit Range/Performance (Bank 2)
P0082 - Intake Valve Control Solenoid Circuit Low (Bank 2)
P0420 - Catalyst System Efficiency Below Threshold (Bank 1)

I have all these code currently, and still working on a solution. The first mechanic I went to saw all but 82, and didn't know anything about 26 and 28 and referred me to an exhaust specialty shop, who then didn't feel comfortable replacing the cat until we figured out 26 and 28. I gave up and went to the dealer, who charged me $94 to basically tell me what the codes were again. After that, they wanted to replace the cat, and ignore the other two to see if they go away. They cleared all the codes and I left the dealership to think about it.

Later on, 420 and 82 came on (and apparently 82 drops your RPM threshold to 4000 as a safety measure). My initial thought is that just replacing the cat like the dealer said is ignoring an underlying problem, it probably shouldn't just go bad on it's own, especially if there are co-existing intake issues. I'm curious though if anybody else has encountered these issues or has any input before I drop $1400 at the dealership to replace my solenoids and cat, or buy the parts and do it myself. I've tried searching and really can't find any useful information on these codes at all.

Thanks
* Registered users of the site do not see these ads.
romer628 is offline   Reply With Quote
Sponsored Links
* Registered users of the site do not see these ads.
Old 07-02-2009, 11:54 AM   #2
thisisntjared
Scooby Specialist
 
Member#: 177891
Join Date: Apr 2008
Chapter/Region: Tri-State
Location: south jersey
Vehicle:
06 wrx wagon
child seat/tow hitch cgm

Default

i know this is way late, but was this ever resolved? i want to say it could be an electrical issue but i dont honestly know.
thisisntjared is offline   Reply With Quote
Old 07-03-2009, 08:34 PM   #3
romer628
Scooby Newbie
 
Member#: 171091
Join Date: Feb 2008
Location: Buffalo, NY
Vehicle:
2006 Impreza 2.5i
Black

Default Issue Resolved

I took the car to another shop for a second opinion. Apparently the Intake Valve Solenoid just came loose. They tested them and connected them better and the light has been off ever since. As far as the cat goes, we did a full system cleanse. They disconnected the gas tank and used a separate one they had with some kind of fluid that they burned to clean out the entire system from end to end. It reduced the emissions some, but it was still just shy of passing. Having now spent over $400 I finally opted for the O2 sensor spacer trick and fixed my 420 code for $25.

As far as the dealership goes, I was quite upset with them. I called them back to get a little more information on their diagnosis. They finally admitted to the fact that they didn't know anything about the solenoid codes either, and nobody there had ever seen them before, and they didn't bother calling their tech line to ask about it. They didn't try any sort of diagnosis at all (if they had, they would've found the loose connection). In regards to the cat, they wanted to replace it purely on the basis of the 420 code, they didn't do any testing. They had suggested that the cat was causing the solenoid codes, and I questioned how something so far downstream could affect it. They said it might if it was clogged. I then asked them why I wouldn't have noticed a power loss if it was that clogged, and if they had tried dropping the pipe to test airflow. At this point it became pretty clear that they really didn't do anything besides check the codes, which AutoZone does for free. They suggested I bring it back in for a second look, but I got them to agree for a 50% refund instead, which $55 is still too much for what little they did actually do.

In the end, their suggestion of just replacing the cat and not addressing the other codes was right, but their logic was very flawed, they were very quick to make me spend more money for things they weren't sure I needed, and they certainly didn't mind charging me for work they never did. But my car is happy now, it passed inspection and has no orange CELs yelling at me any more, and it's never going to see the inside of a dealership again.
romer628 is offline   Reply With Quote
Old 07-03-2009, 08:35 PM   #4
romer628
Scooby Newbie
 
Member#: 171091
Join Date: Feb 2008
Location: Buffalo, NY
Vehicle:
2006 Impreza 2.5i
Black

Default

Oh, and thanks for taking to time to respond, even though it's a bit after the fact.
romer628 is offline   Reply With Quote
Old 07-03-2009, 08:42 PM   #5
Uncle Scotty
*** Banned ***
 
Member#: 16200
Join Date: Mar 2002
Vehicle:
OK buy Nates beans
westcoastroasting.com

Default

Quote:
Originally Posted by romer628 View Post
I took the car to another shop for a second opinion. Apparently the Intake Valve Solenoid just came loose. They tested them and connected them better and the light has been off ever since. As far as the cat goes, we did a full system cleanse. They disconnected the gas tank and used a separate one they had with some kind of fluid that they burned to clean out the entire system from end to end. It reduced the emissions some, but it was still just shy of passing. Having now spent over $400 I finally opted for the O2 sensor spacer trick and fixed my 420 code for $25.

As far as the dealership goes, I was quite upset with them. I called them back to get a little more information on their diagnosis. They finally admitted to the fact that they didn't know anything about the solenoid codes either, and nobody there had ever seen them before, and they didn't bother calling their tech line to ask about it. They didn't try any sort of diagnosis at all (if they had, they would've found the loose connection). In regards to the cat, they wanted to replace it purely on the basis of the 420 code, they didn't do any testing. They had suggested that the cat was causing the solenoid codes, and I questioned how something so far downstream could affect it. They said it might if it was clogged. I then asked them why I wouldn't have noticed a power loss if it was that clogged, and if they had tried dropping the pipe to test airflow. At this point it became pretty clear that they really didn't do anything besides check the codes, which AutoZone does for free. They suggested I bring it back in for a second look, but I got them to agree for a 50% refund instead, which $55 is still too much for what little they did actually do.

In the end, their suggestion of just replacing the cat and not addressing the other codes was right, but their logic was very flawed, they were very quick to make me spend more money for things they weren't sure I needed, and they certainly didn't mind charging me for work they never did. But my car is happy now, it passed inspection and has no orange CELs yelling at me any more, and it's never going to see the inside of a dealership again.

I HOPE SOA SEES THIS
Uncle Scotty is offline   Reply With Quote
Old 07-05-2009, 02:28 PM   #6
thisisntjared
Scooby Specialist
 
Member#: 177891
Join Date: Apr 2008
Chapter/Region: Tri-State
Location: south jersey
Vehicle:
06 wrx wagon
child seat/tow hitch cgm

Default

Wow, what a mess!! I don't get to read many posts but the few I do read that are left open and only a month or two old I wonder how things turned out.

Things like that make me very uneasy about taking my car anywhere to have work done. I am glad it eventually worked out and the dealership at least tried to be accommodating after getting caught clueless. It goes to show that mechanics are not engineers.
thisisntjared is offline   Reply With Quote
Old 10-26-2009, 03:15 PM   #7
star5cr34m
Scooby Newbie
 
Member#: 222784
Join Date: Sep 2009
Chapter/Region: MAIC
Location: Wagontown, PA
Vehicle:
2002 Jeep TJ
Black

Default

Quote:
Originally Posted by romer628 View Post
I took the car to another shop for a second opinion. Apparently the Intake Valve Solenoid just came loose.
my car is throwing the same two codes (P0026 and P0028)

where is the Intake Valve Solenoid and what can i do to make sure its not loose?

thanks.
star5cr34m is offline   Reply With Quote
Old 10-29-2009, 08:33 PM   #8
jthurston
Scooby Newbie
 
Member#: 228441
Join Date: Oct 2009
Default

Quote:
Originally Posted by star5cr34m View Post
my car is throwing the same two codes (P0026 and P0028)

where is the Intake Valve Solenoid and what can i do to make sure its not loose?

thanks.
Same for me, I strongly suspect mine might be loose as well.
jthurston is offline   Reply With Quote
Old 10-29-2009, 10:31 PM   #9
star5cr34m
Scooby Newbie
 
Member#: 222784
Join Date: Sep 2009
Chapter/Region: MAIC
Location: Wagontown, PA
Vehicle:
2002 Jeep TJ
Black

Default

i cant find out where the stupid connectors are

any help?
star5cr34m is offline   Reply With Quote
Old 10-31-2009, 12:30 PM   #10
Beam
Scooby Newbie
 
Member#: 29742
Join Date: Nov 2002
Chapter/Region: NESIC
Location: The Wu, MA
Vehicle:
2011 STI
15 S1000R

Default

If it's the same as the idle air valve, there's a link in the stickies in this forum.
Beam is offline   Reply With Quote
Old 11-01-2009, 01:56 PM   #11
romer628
Scooby Newbie
 
Member#: 171091
Join Date: Feb 2008
Location: Buffalo, NY
Vehicle:
2006 Impreza 2.5i
Black

Default

Here's a picture showing the solenoids. There are two of them.

romer628 is offline   Reply With Quote
Old 11-01-2009, 02:08 PM   #12
romer628
Scooby Newbie
 
Member#: 171091
Join Date: Feb 2008
Location: Buffalo, NY
Vehicle:
2006 Impreza 2.5i
Black

Default

Quote:
Originally Posted by romer628 View Post
I took the car to another shop for a second opinion. Apparently the Intake Valve Solenoid just came loose. They tested them and connected them better and the light has been off ever since. As far as the cat goes, we did a full system cleanse. They disconnected the gas tank and used a separate one they had with some kind of fluid that they burned to clean out the entire system from end to end. It reduced the emissions some, but it was still just shy of passing. Having now spent over $400 I finally opted for the O2 sensor spacer trick and fixed my 420 code for $25.

As far as the dealership goes, I was quite upset with them. I called them back to get a little more information on their diagnosis. They finally admitted to the fact that they didn't know anything about the solenoid codes either, and nobody there had ever seen them before, and they didn't bother calling their tech line to ask about it. They didn't try any sort of diagnosis at all (if they had, they would've found the loose connection). In regards to the cat, they wanted to replace it purely on the basis of the 420 code, they didn't do any testing. They had suggested that the cat was causing the solenoid codes, and I questioned how something so far downstream could affect it. They said it might if it was clogged. I then asked them why I wouldn't have noticed a power loss if it was that clogged, and if they had tried dropping the pipe to test airflow. At this point it became pretty clear that they really didn't do anything besides check the codes, which AutoZone does for free. They suggested I bring it back in for a second look, but I got them to agree for a 50% refund instead, which $55 is still too much for what little they did actually do.

In the end, their suggestion of just replacing the cat and not addressing the other codes was right, but their logic was very flawed, they were very quick to make me spend more money for things they weren't sure I needed, and they certainly didn't mind charging me for work they never did. But my car is happy now, it passed inspection and has no orange CELs yelling at me any more, and it's never going to see the inside of a dealership again.
So I finally figured out what caused my cat to go. Here's a quote from a letter I received from Subaru this week:

"During a quality review, we discovered that the one-way fuel valve located in your vehicle's fuel tank may not perform as intended and could cause a condition that may damage the catalytic converter."

So despite my best efforts to keep my car out the dealership, I'll be going in soon to have my recall performed. Since their recall part damaged my cat, they'll also be replacing my cat for free while I'm there. Hopefully they'll agree the first time I ask . Otherwise you'll be seeing all the details in another thread. (I'll be taking out the O2 spacer of course and is for sale if anybody needs one). The Intake Valve Solenoid codes still haven't given me any problems since the tightening.
romer628 is offline   Reply With Quote
Old 11-01-2009, 08:29 PM   #13
thisisntjared
Scooby Specialist
 
Member#: 177891
Join Date: Apr 2008
Chapter/Region: Tri-State
Location: south jersey
Vehicle:
06 wrx wagon
child seat/tow hitch cgm

Default

two thumbs up on giving a good update for posterity :thumbsup::thumbsup:
thisisntjared is offline   Reply With Quote
Old 11-01-2009, 11:38 PM   #14
Uncle Scotty
*** Banned ***
 
Member#: 16200
Join Date: Mar 2002
Vehicle:
OK buy Nates beans
westcoastroasting.com

Default

Quote:
Originally Posted by romer628 View Post
So I finally figured out what caused my cat to go. Here's a quote from a letter I received from Subaru this week:

"During a quality review, we discovered that the one-way fuel valve located in your vehicle's fuel tank may not perform as intended and could cause a condition that may damage the catalytic converter."

So despite my best efforts to keep my car out the dealership, I'll be going in soon to have my recall performed. Since their recall part damaged my cat, they'll also be replacing my cat for free while I'm there. Hopefully they'll agree the first time I ask . Otherwise you'll be seeing all the details in another thread. (I'll be taking out the O2 spacer of course and is for sale if anybody needs one). The Intake Valve Solenoid codes still haven't given me any problems since the tightening.



'spacers' are used to fool pre-04 ECU into thinking catless exhausts still have cats in them and if you have any cats in the system...you screwed yourself and caused yourself much of these issues by doing this

NEVER-EVER use any o2 'spacer' on any 04+ vehicle.....throws the fuel trims off because the rear o2 sensor provides feedback for trims

Last edited by Uncle Scotty; 11-01-2009 at 11:43 PM.
Uncle Scotty is offline   Reply With Quote
Old 11-03-2009, 06:25 PM   #15
romer628
Scooby Newbie
 
Member#: 171091
Join Date: Feb 2008
Location: Buffalo, NY
Vehicle:
2006 Impreza 2.5i
Black

Default

Quote:
Originally Posted by Uncle Scotty View Post
'spacers' are used to fool pre-04 ECU into thinking catless exhausts still have cats in them and if you have any cats in the system...you screwed yourself and caused yourself much of these issues by doing this

NEVER-EVER use any o2 'spacer' on any 04+ vehicle.....throws the fuel trims off because the rear o2 sensor provides feedback for trims
I didn't install the spacer until after all of the codes were already on, and had been on for quite some time. After installing it, my check engine light went off, and stays off 90% of the time. So as far as I can tell, the O2 spacer has only helped at this point. I have no intention of using one in conjunction with a working cat. Could anyone provide any more information about what 02 spacers do to 04+ models? I didn't find anything about this when I researched it before purchasing one.
romer628 is offline   Reply With Quote
Old 12-13-2009, 08:31 AM   #16
m33m
Scooby Newbie
 
Member#: 232300
Join Date: Dec 2009
Default check valve recall then CEL??

I'm new to Subaru, just bought an 06 2.5 normally aspirated wagon. REad about the recall an had it done along with $560 !! 60K service...ouch.

Now 160 miles later the CEL is on, haven't had anyone read the codes yet, but could this be related to the recall...I suspect that it is

also the cruise light is flashing, tried the manual's instruction to hit the cruise with only acc on, did not stop the flashing...what's up
m33m is offline   Reply With Quote
Old 02-26-2010, 08:55 AM   #17
Cherylynn
Scooby Newbie
 
Member#: 239529
Join Date: Feb 2010
Default 2006 Impreza - P0026, P0028 Codes

Quote:
Originally Posted by star5cr34m View Post
my car is throwing the same two codes (P0026 and P0028)

where is the Intake Valve Solenoid and what can i do to make sure its not loose?

thanks.
My car has had the same problem a couple of times, the Subaru service technician made me feel like an idiot explaining that I probably recently put in gas and did not tighten the cap tight enough. And said I should wait and see if it goes away.

The last time this happened I had a flickering oil light when braking, had the oil changed and the problem went away. This time I did the same - and the check engine light is still on and the cruise light is flashing. The Mr. Lubes technician (nice knowledgeable guy) did a FREE engine scan (that Subaru guy said that scan would cost me $79.99) and told me that it's these 2 codes.

This is my 2nd Impreza, and I really love my car but I really am not impressed with my dealership... So, what's the best plan to clear these codes? Trade in for a different car is one of the options on my list

I welcome your suggestions. Thanks.
Cherylynn is offline   Reply With Quote
Old 02-26-2010, 01:18 PM   #18
romer628
Scooby Newbie
 
Member#: 171091
Join Date: Feb 2008
Location: Buffalo, NY
Vehicle:
2006 Impreza 2.5i
Black

Default

Try looking at my post with the picture above. I showed where the solenoids are. Check to make sure those cables are clipped in tight. Otherwise find a decent mechanic that can fix them for you. (The Subaru dealership I went to didn't know anything about them, so try calling around to find a good mechanic that is familiar with the issue first.)

Quote:
Originally Posted by Cherylynn View Post
My car has had the same problem a couple of times, the Subaru service technician made me feel like an idiot explaining that I probably recently put in gas and did not tighten the cap tight enough. And said I should wait and see if it goes away.

The last time this happened I had a flickering oil light when braking, had the oil changed and the problem went away. This time I did the same - and the check engine light is still on and the cruise light is flashing. The Mr. Lubes technician (nice knowledgeable guy) did a FREE engine scan (that Subaru guy said that scan would cost me $79.99) and told me that it's these 2 codes.

This is my 2nd Impreza, and I really love my car but I really am not impressed with my dealership... So, what's the best plan to clear these codes? Trade in for a different car is one of the options on my list

I welcome your suggestions. Thanks.
romer628 is offline   Reply With Quote
Old 11-19-2010, 06:53 PM   #19
Dougr
Scooby Newbie
 
Member#: 263221
Join Date: Nov 2010
Default

Oh boy. I've got the P0026 code only, so one bank. I see them on the engine and am going to disconnect, clean, reattach, etc.

Any new info on these codes?

'07 Forester, 2.5 N/A
Dougr is offline   Reply With Quote
Old 12-03-2010, 10:07 PM   #20
Xainos
Scooby Newbie
 
Member#: 265931
Join Date: Dec 2010
Default p0026 - 28

I have a 08 forster p0028 -26. is there a way to tighten the solenoids ?


Quote:
Originally Posted by Dougr View Post
Oh boy. I've got the P0026 code only, so one bank. I see them on the engine and am going to disconnect, clean, reattach, etc.

Any new info on these codes?

'07 Forester, 2.5 N/A
Xainos is offline   Reply With Quote
Old 12-04-2010, 12:47 AM   #21
Uncle Scotty
*** Banned ***
 
Member#: 16200
Join Date: Mar 2002
Vehicle:
OK buy Nates beans
westcoastroasting.com

Default

many times this p0026 and p0028 codes are indicative of poor maintenance and too long oil change interval as sludge builds up in the mechanism and it fails
Uncle Scotty is offline   Reply With Quote
Old 01-27-2011, 02:16 PM   #22
fizz1250
Scooby Newbie
 
Member#: 262778
Join Date: Nov 2010
Default

when CEL comes on for any malfunction the cruise control light flashes as a saftey precaution because subaru doesnt want you using cruise control when a malfunction is present. As for the code ive been trying to haggle the dealership to replace my cat on my 06 2.5i because i intermittenly get p0420 code. Had it cleared keeps coming on, cars got 42k miles on it.
fizz1250 is offline   Reply With Quote
Old 01-27-2011, 03:58 PM   #23
Uncle Scotty
*** Banned ***
 
Member#: 16200
Join Date: Mar 2002
Vehicle:
OK buy Nates beans
westcoastroasting.com

Default

Quote:
Originally Posted by fizz1250 View Post
when CEL comes on for any malfunction the cruise control light flashes as a saftey precaution because subaru doesnt want you using cruise control when a malfunction is present. As for the code ive been trying to haggle the dealership to replace my cat on my 06 2.5i because i intermittenly get p0420 code. Had it cleared keeps coming on, cars got 42k miles on it.
you could try a different brand of fuel

some fuel has more oxygenate in it(ethanol percentage may be more than 10%) and that can cause issues like this
Uncle Scotty is offline   Reply With Quote
Old 09-11-2011, 09:52 PM   #24
greasepiggy
Scooby Newbie
 
Member#: 294092
Join Date: Sep 2011
Default intake valve control solenoid location?

Someone posted a pic of where these guys were located but it's not there anymore. Can someone post a pic again? Mine need attention.
Thanks!
Greasepiggy
greasepiggy is offline   Reply With Quote
Old 10-18-2011, 01:56 PM   #25
bradze
Scooby Specialist
 
Member#: 103208
Join Date: Dec 2005
Chapter/Region: NWIC
Location: Yelm, Wa
Vehicle:
2011 Outback
Azurite Blue

Default

yes where is it? just got p0028, cant afford to pay a mechanic right now, especially if its just loose
bradze 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
CEL givin me a P0420 modusvivendi Engine Management & Tuning 2 09-24-2009 12:34 PM
cel codes p0301 and p0420 hagood22 Newbies & FAQs 0 04-17-2008 09:14 PM
UTEC Stg2 w/ cel P0420. CEL in utec is turned off wrx_nooblet Factory 2.0L Turbo Powertrain (EJ Series Factory 2.0L Turbo) 1 08-15-2005 04:36 PM
WRX(02-04) STI(04-05) Mechanical CEL fix for p0420 P0420 scoobbee Private 'For Sale' Classifieds 8 07-19-2004 09:02 PM
CEL P0420 - any ideas wrxtremeWGN Factory 2.0L Turbo Powertrain (EJ Series Factory 2.0L Turbo) 0 05-12-2002 05:00 PM

All times are GMT -4. The time now is 03:46 AM.


Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2017, Jelsoft Enterprises Ltd.
Powered by Searchlight © 2017 Axivo Inc.
Copyright ©1999 - 2017, North American Subaru Impreza Owners Club, Inc.