Welcome to the world of Saab ! Register
Results 1 to 1 of 1
  1. #1

    Join Date
    05 Sep 2018
    Location
    USA
    Posts
    2
    Saab(s)
    2003 9-5 Aero
    Thumbs Up:   0

    new O2 sensor causing idling problems and misfiring

    I have a 2003 9-5 aero. The check engine light recently turned on along with an error code for the O2 sensor (bank 1, sensor 1). At that time I didn't have any noticeable problems with the car. It ran fine and idled fine. But I went ahead and replaced the upstream O2 sensor (Bosch OE). I then used an OBD scanner to check for codes and cleared them. Two codes detected, listed below.

    P0134 O2 sensor circuit - no activity detected - bank 1, sensor 1
    P0300 Random/Multiple cylinder misfire detected

    At this point I have a new O2 sensor installed, the check engine light is off and no codes appear on the scanner. However, it now has a problem idling. Each time I start the car it struggles to idle and right before it dies the engine revs and the tach surges. It sounds like it's misfiring as well. I haven't driven it since replacing the O2 sensor. I'm worried that it will die on me as soon as I pull up to a stoplight.

    Should I replace the downstream O2 sensor? There is currently a brand new upstream sensor and a 15 year old downstream sensor. Not sure if that would cause this problem. Has anyone experienced this problem after installing a new sensor? Thanks.

    0 Not allowed!
    Last edited by saabmonster; 2 Weeks Ago at 10:35. Reason: added error codes

 

 

Similar Threads

  1. vibrations at idling
    By dimebag in forum Saab 9-3 (2003-2014)
    Replies: 2
    Last Post: 14 August 2018, 08:47
  2. Misfiring. Need Help.
    By cfrierson11 in forum Saab 9-3 (2003-2014)
    Replies: 4
    Last Post: 01 September 2016, 17:37
  3. New-to-me 2000 SE causing problems
    By TheFox in forum Saab 9-5 (1998-2009)
    Replies: 8
    Last Post: 26 January 2016, 22:30
  4. 9-3 turbo diesel misfiring
    By Joe Goss in forum Saab 9-3 (2003-2014)
    Replies: 0
    Last Post: 05 November 2015, 02:03
  5. Replies: 12
    Last Post: 16 September 2013, 17:10

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  
All times are GMT. The time now is 16:53.
Powered by vBulletin® Version 4.2.5
Copyright © 2018 vBulletin Solutions Inc. All rights reserved.