saab92x.com - Over 10% of all 9-2x owners registered

Saab92x.com is dedicated to the discussion of the Saab 9-2x sport wagon, based on the Subaru WRX.
Please register or login to post.

Welcome to Saab92x.com!
Saab92X.com is the premier Saab92X forum on the internet. Registered Users do not see the above ads.Please Register - It's Free!

#1 2020-02-22 14:47:14

thejameshimself
Member
From: Texas
Registered: 2013-12-26
User Number: 13280
Posts: 101

P0131 Code (front o2 A/F) on car w/ new-ish front o2 sensor

Thought I would share an interesting run-in I had with p0131:

Over the last few weeks my '05 linear has been hunting at idle and feeling sluggish. CEL eventually came on with P0131 (02 Sensor Low Voltage), but my o2 sensor was changed about 5k miles ago w/ a new sensor ordered from Subaru.

After searching about alternate causes I found out this code can also be triggered by an intake leak and/or dirty MAF sensor. I checked the hoses going to the intake and they all looked normal, so I took off the MAF, saw it was dirty, cleaned the sensor elements as well as the IAT sensor with rubbing alcohol and a q-tip, reassembled.

Viola Cello, engine is back to normal and CEL is gone all by itself.

Last edited by thejameshimself (2020-02-23 17:06:18)


US Production # 1936

Offline

 

Remove Advertisements Advertisement

Saab92X.com

Offline

 

#2 2020-02-22 15:03:30

deliverator
Member
From: Centennial, CO
Registered: 2006-04-26
User Number: 1114
Posts: 794

Re: P0131 Code (front o2 A/F) on car w/ new-ish front o2 sensor

Viola, engine is back to normal and CEL is gone all by itself.

https://upload.wikimedia.org/wikipedia/commons/c/cd/Bratsche.jpg

Offline

 

#3 2020-02-23 17:05:11

thejameshimself
Member
From: Texas
Registered: 2013-12-26
User Number: 13280
Posts: 101

Re: P0131 Code (front o2 A/F) on car w/ new-ish front o2 sensor

facepalm welp, time to hit that edit button


US Production # 1936

Offline

 

#4 2020-02-24 12:31:08

jixaw
Member
From: Cambridge, MA
Registered: 2016-02-22
User Number: 35856
Posts: 184

Re: P0131 Code (front o2 A/F) on car w/ new-ish front o2 sensor

thank you...i have the same issue...i'll try your solution


2005 Saab 9-2x Linear - Auto - Deep Blue Mica - Cold Weather Package - - Mods: Aero Rear Sway Bar, Perrin FSB, Whiteline QR RSB, KYB-G Excel Shocks, STI Pink Springs, Tsudo UEL, Custom catback with Magnaflow, Centric rotors & posi-quiet ceramic pads, 17" ASAs w/Dunlop Direzzas (summer), 16" OEM alloys w/studded Nokian hakka 7's (winter), 35% tint sides/rear

Offline

 

#5 2020-02-24 12:35:53

snowphun
Member
From: Central CT
Registered: 2005-11-09
User Number: 890
Posts: 610

Re: P0131 Code (front o2 A/F) on car w/ new-ish front o2 sensor

I got this code for the first time last week when I gave my POS Linear some stick to merge onto the highway, I'll try cleaning the MAF if it ever comes back.

Offline

 

Board footer

Site problems, bugs, or questions? Contact Administrator
All content copyright Saab92x.com 2005-2010
SAAB and the SAAB logos are trademarks of Saab Cars USA, Inc.