Results 1 to 5 of 5

Thread: O2 sensor monitor not ready for CA SMOG

  1. #1
    Join Date
    Jul 2020
    Location
    Rosemead, CA
    Posts
    1
    My Cars
    2004 BMW 325i 5MT

    O2 sensor monitor not ready for CA SMOG

    Car is a 2004 325i 5MT and has 158k miles. Currently attempting to pass CA SMOG, getting closer than before now. Everything else is ready now except the oxygen sensor monitor. Could anyone have an idea? I have a log of the car idling warm after a drive. I replaced MAF with OEM VDO as I had a problem previously another brand. Car has completely no vacuum leaks or SES for the pass 3-4 drive cycles. One thing is the SAP is ticking, but I’m not sure if that would cause the oxygen sensor to show not ready. Any help would be nice!

    LOG:
    https://drive.google.com/file/d/1dkciagciDzaPFsMnqWh_YNEaiAm1SdEh/view?usp=sharing



  2. #2
    Join Date
    Jul 2011
    Location
    Arlington, VA
    Posts
    9,943
    My Cars
    2018 BMW M240i
    Are the pre-catalytic converter oxygen sensors original? They need to be changed at 125k miles (I think the oxygen sensors are wide band sensors). Go to www.realoem.com and enter the last 7 characters of your car’s vehicle identification number. Hit enter and bookmark the page. Scroll down to engine electrical and get the part number for the pre-cat sensors. Then google the part number. BMW considers oxygen sensors to be consumables.

  3. #3
    Join Date
    Apr 2013
    Location
    Mill Valley, CA
    Posts
    346
    My Cars
    2003 330cic
    Btw you can pass in CA with one test not complete. But replace your o2 sensors as Marco said

  4. #4
    Join Date
    Jan 2016
    Location
    Ca
    Posts
    6,981
    My Cars
    2001 525it
    In my area the only one that does not need to be set is evap

  5. #5
    Join Date
    Mar 2016
    Location
    Portland, OR
    Posts
    712
    My Cars
    2002 325Ci Cabriolet
    Quote Originally Posted by jclausen View Post
    In my area the only one that does not need to be set is evap
    As I have come to learn, the EVAP will only complete a READY status if the fuel tank is between 1/4 - 3/4. This is likely why many emissions testings don't require this to be READY and yet you can still pass.

Similar Threads

  1. 04 525i obm 2 monitors not ready oxygen sensor
    By Mclouie67 in forum 2004-2010 (E60,E61)
    Replies: 2
    Last Post: 03-13-2020, 06:57 AM
  2. Replies: 25
    Last Post: 06-27-2019, 03:22 AM
  3. 04 530i o2 sensor monitor "not ready" No CEL
    By Arodiguez5160 in forum 2004-2010 (E60,E61)
    Replies: 5
    Last Post: 02-18-2017, 09:09 AM
  4. 2001 Z3 smog fail due to catalytic converter monitor not ready after 360 miles
    By CalTex in forum General BMW Mechanical Help sponsored by RM European Auto Parts
    Replies: 1
    Last Post: 12-10-2013, 08:52 PM
  5. O2 sensor will not come off!!!
    By javiwwweb in forum 1991 - 1999 (E36)
    Replies: 4
    Last Post: 09-29-2003, 01:04 AM

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •