1. #1
    v8only's Avatar
    v8only is offline Junior Member
    Join Date
    Apr 2009
    Posts
    2

    code p0031 in a 2003 cherokee 4.0..Lost!!

    Hello, got code p0031 in the 03 2wd cherokee and have replaced #1 o2 sensore before the cat with two different dealer o2 sensors.

    the ecu has also been replaced.

    completely lost here. p0031 will NOT go away, and we can't get this thing through california smog.

    any ideas here?? Thanks all..Jeremy

  2. #2
    SteelHeadz's Avatar
    SteelHeadz is offline Moderator
    Join Date
    Oct 2008
    Location
    Kerrville, TX
    Posts
    6,087

    Re: code p0031 in a 2003 cherokee 4.0..Lost!!

    Cherokee or Grand Cherokee?. K1 Body (CKD) Cherokee or X2(China) Cherokee. I'm confused. Here are the possible causes for the P0031.
    O2 HEATER TEST
    O2 SENSOR HEATER ELEMENT
    (F142) FUSED ASD RELAY OUTPUT CIRCUIT OPEN
    HEATER CONTROL CIRCUIT OPEN
    HEATER CONTROL CIRCUIT SHORTED TO GROUND
    PCM

    TEFrom the looks of it , youv'e STBy the s
    FF

    F
    Confucious says: Don't eat the snow where the huskies go!

  3. #3
    SteelHeadz's Avatar
    SteelHeadz is offline Moderator
    Join Date
    Oct 2008
    Location
    Kerrville, TX
    Posts
    6,087

    Re: code p0031 in a 2003 cherokee 4.0..Lost!!

    From what the possible causes VS what you've already replaced, it looks like an electrical issue. Check the Fuses on the PDC first.
    Confucious says: Don't eat the snow where the huskies go!

  4. #4
    v8only's Avatar
    v8only is offline Junior Member
    Join Date
    Apr 2009
    Posts
    2

    Re: code p0031 in a 2003 cherokee 4.0..Lost!!

    pdc? I assume you're talking about the primary fuses?

    It's a grand cherokee.

    I'll check all the fuses....Thanks!

Similar Threads

  1. Grand Cherokee: Lost oil pressure/ Sloshing sound
    By Jake89 in forum Cherokee, Commander, Wagoneer and Liberty
    Replies: 7
    Last Post: 12-22-2008, 07:41 AM
  2. Rolling code on '96 Grand Cherokee Homelink
    By Timithing in forum Cherokee, Commander, Wagoneer and Liberty
    Replies: 1
    Last Post: 06-06-2004, 09:21 PM
  3. code reader for 86 Cherokee
    By RAVEN13xxx in forum Cherokee, Commander, Wagoneer and Liberty
    Replies: 1
    Last Post: 07-20-2003, 07:00 PM
  4. 97 cherokee computer code: 45
    By MudderChuck in forum Cherokee, Commander, Wagoneer and Liberty
    Replies: 3
    Last Post: 07-20-2003, 07:00 PM
  5. 85 Cherokee paint code verification??
    By vfrf2 in forum Cherokee, Commander, Wagoneer and Liberty
    Replies: 0
    Last Post: 07-20-2003, 07:00 PM

Posting Permissions

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

Log in

Log in