Hunting idle after cold start up - Page 2
Welcome guest, is this your first visit? Click the "Create Account" button now to join.

User Tag List

Page 2 of 2 FirstFirst 1 2
Results 11 to 12 of 12
Like Tree2Likes

Thread: Hunting idle after cold start up

  1. #11
    FST Member Rein_FOST's Avatar
    This user has no status.
     

    Join Date
    Jan 2017
    Posts
    12
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Some feedback.

    I got my new diagnostics tool and scanned for dtc codes. Sure enough two came up: P0420 which is a generic code for lambda sensor failure or o2 related issues and then the actual issue I suspect : P2237 which is heater circuit open or shorted.

    I then also read that it has a fuse/lug as well which should be 20amps. Upon checking there was a 15amp fuse in the position and didn't seem blown. I replaced it with a 20 amp fuse in any case.

    Could the fuse be an issue as I haven't testes it yet as car needs to cool down. If not then need to change the sensor.

    Sent from my F8331 using Tapatalk

  2. #12
    FST Member Rein_FOST's Avatar
    This user has no status.
     

    Join Date
    Jan 2017
    Posts
    12
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Seems either the fuse or unplugging the sensor and connecting it resolved the issue. The plastic is broken from the sensors connection so it might have also wiggled a bit loose. So just taped it with some electrical tape.

    Tested car this morning and late afternoon after it cooles down and idle seems to be normal again.

    Sent from my F8331 using Tapatalk
    UnfocusedST likes this.

 

 
Page 2 of 2 FirstFirst 1 2

Sponsored Links

Posting Permissions

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

Similar Threads

  1. Funny idle on start up
    By HBGeek in forum Focus ST Discussions
    Replies: 4
    Last Post: 03-19-2016, 01:05 AM
  2. Rough Cold Idle
    By rtw07 in forum Focus ST Maintenance
    Replies: 14
    Last Post: 04-17-2015, 02:56 PM
  3. Stalling, hunting RPM and rough Idle repair list
    By Twheeler.stl in forum Focus ST Discussions
    Replies: 25
    Last Post: 08-13-2014, 09:49 AM
  4. Hunting Idle TSB? Ford says NO!
    By komsSTeed in forum Focus ST Performance
    Replies: 11
    Last Post: 01-26-2014, 02:37 PM
  5. Hunting idle, dying out
    By eddog216 in forum Focus ST Discussions
    Replies: 2
    Last Post: 11-03-2013, 05:13 PM
Find us on Google+