Welcome to the North American Subaru Impreza Owners Club Thursday October 19, 2017
Home Forums WikiNASIOC Products Store Modifications Upgrade Garage
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. 
Thread Tools Display Modes
Old 02-28-2008, 09:14 PM   #1
Scooby Newbie
Member#: 116247
Join Date: May 2006
Chapter/Region: MWSOC
Location: gunsrazorsknives
Default New WRX owner. Used 2002 wagon. Code P1086

P1086 Tumble generator valve #2 (LH) position sensor circuit low input

I live in Omaha, bought the car in Buffalo, NY... 2 days ago. The CEL came up 30 miles into my trip. Around 500 miles back, it shut off. Came back on this morning.

At first when I got it scanned at Autozone it said Manf control fuel & air metering auxilary emission controls. Thought at first it was MAF, so I put a newer one in anyway and obviously didnt fix it.

Got on here and found it was the tumble generator. I am new to the WRX world, and have heard a little about the butterfly valves and tumble generator whatever, but I'm pretty much lost.

How serious, and possibly fix myself? The car has 100,000 + miles, so the low input makes me think it might be a corroded wire or something?
* Registered users of the site do not see these ads.
theDaishi is offline   Reply With Quote
Sponsored Links
* Registered users of the site do not see these ads.
Old 02-28-2008, 09:41 PM   #2
Scooby Guru
Member#: 21808
Join Date: Jul 2002
Chapter/Region: E. Canada
Location: National Capital Region
02 GroceryGettAr
Nonemore Black


iirc 1086 is the sensor rather than the actual valve mechanism. They're fairly easy to break - dealer broke my LH one when replacing the a/c compressor and several people have broken a RH one when doing turbo replacements

if you search the 2.0 Powertrain forum there's some good info

iirc the dealer will try to sell you the complete assembly, but the faulty sensor is the same part as the throttle position sensor (TPS) which is a much cheaper fix
UkNuck is offline   Reply With Quote

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
New member...new wrx owner Scott02wrx Newbies & FAQs 6 08-10-2008 12:10 AM
WRX owners using an STi TMIC, question about gaskets deblas66 Factory 2.5L Turbo Powertrain (EJ Series Factory 2.5L Turbo) 7 06-08-2007 05:24 PM
what FMIC are 2006 wrx owners using need2boost Factory 2.5L Turbo Powertrain (EJ Series Factory 2.5L Turbo) 10 12-01-2006 11:57 PM
Any 2003 WRX owners using unichip? WRXVII Engine Management & Tuning 3 08-03-2003 03:24 AM
New WRX owner in new house in new area! JAMES_WRX03 General Community 7 02-24-2003 02:05 PM

All times are GMT -4. The time now is 11:48 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.