Welcome to the North American Subaru Impreza Owners Club Sunday November 17, 2019
Home Forums WikiNASIOC Products Store Modifications Upgrade Garage
NASIOC
Go Back   NASIOC > NASIOC General > Newbies & FAQs

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 10-16-2019, 10:31 PM   #1
Camswe
Scooby Newbie
 
Member#: 507475
Join Date: Oct 2019
Default 2010 Impreza P0420

Whats up all,

long time browser first time poster, i know there are many posts on this yet mine is different from all i have read.

Here are the facts:
2010 impreza 5 speed, rebuilt motor and swapped trans 5000 on engine and 100k on trans, 150k body (paperwork inc)
Have aftermarket cat/exhaust manifold.
Have a P0420 code and a permanent CEL, No TCS, No Cruise (as of today)

I was driving this morning and the car studered for about 10 seconds at a stop light. A few miles later it stuttered then went into limp mode for roughly a minute throwing the CEL, blinking Cruise, and no TCS. I drove it about another 4 miles to my destination. Got it scanned and popped a P0420. Drove her home and the lights are constant but no more limp, in fact it feels perfect except the lights. The exhaust looks fine no cracks, loose bits or otherwise.

Its $260 for both sensors, although i know it could be the cat. I feel like my gas mileage is pretty crappy currently.

Should i jimmy the sensors to rid the codes or spend money on a whole new setup? any advice would be helpful i'm in a tight spot for money until november.

Here's a few pics, first is cat/manifold second is connection post cat and third is connection post mid pipe.

https://drive.google.com/open?id=0B7...dGSW44dUQ2NS1r

https://drive.google.com/open?id=0B7...VabVB4S20tOFVZ

https://drive.google.com/open?id=0B7...phd3JMTHQ4TVJr
* Registered users of the site do not see these ads.
Camswe is offline   Reply With Quote
Sponsored Links
* Registered users of the site do not see these ads.
Old 10-17-2019, 12:39 PM   #2
Jedi03
Scooby Newbie
 
Member#: 491095
Join Date: Sep 2018
Chapter/Region: SWIC
Location: New Mexico
Vehicle:
2009 STi Blue
Blue

Default

that code directly suggests the cat...if you want more proof get a laser temp sensor and measure temp before and after cat(after running it like you are goin to an emission test)...if its stupid hot then its clogged..if its normal operation then its the sensors
Jedi03 is offline   Reply With Quote
Old 10-17-2019, 03:29 PM   #3
Jack
Add Lightness
Moderator
 
Member#: 13699
Join Date: Dec 2001
Chapter/Region: NESIC
Location: Hopkinton, MA
Vehicle:
not my president
(From General)

Default

P0420 means "I'm a Subaru". At least that's how I decode it.

You can try all the tricks out there. But if you're having actual drivability issues, have a mechanic who knows what he's doing look at the signals from the front and back O2 sensors. It might be the cat. It might not.
Jack 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 03:45 PM.


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

As an Amazon Associate I earn from qualifying purchases.