Page 1 of 2 12 LastLast
Results 1 to 10 of 12

Thread: Error code 1222

  1. #1
    Join Date
    Sep 2006
    Location
    Erie, PA
    Posts
    65

    Default Error code 1222

    Hi

    Got a check engine light on tonight, I did the pedal pump test and got back code 1222 which is lambda control 1. I understand this is probably the o2 sensor but which one? A while ago, I took my car to the stealership with a check engine light and they diagnosed a faulty o2 sensor (didn't tell me front or back) as I was driving home the engine light went off. It came back on today with that code. I plan on fixing it myself but need to know whether it's the front or back o2.
    If anyone can help, it's appreciated.
    Thanks
    Nate

    Black 1995 525i 100K Mi
    Nat1

  2. #2
    Join Date
    Jan 2004
    Location
    NC
    Posts
    755

    Default We're the lucky ones...OBDI 525's only have one O2 sensor...

    Quote Originally Posted by nmwaldron
    Hi

    Got a check engine light on tonight, I did the pedal pump test and got back code 1222 which is lambda control 1. I understand this is probably the o2 sensor but which one? A while ago, I took my car to the stealership with a check engine light and they diagnosed a faulty o2 sensor (didn't tell me front or back) as I was driving home the engine light went off. It came back on today with that code. I plan on fixing it myself but need to know whether it's the front or back o2.
    If anyone can help, it's appreciated.
    Thanks
    Nate
    ...but your problem may not just be O2 sensor. Code 1222 can indicate O2 sensor out of range, which could mean massive vacuum leak. Check all your vacuum hoses first, including the plenum hose from the airbox to the throttle body, for leaks or cracks. Then search here for code 1222 issues. You'll find a lot.
    Bill B.
    95 525i


  3. #3
    Join Date
    Sep 2006
    Location
    Erie, PA
    Posts
    65

    Default

    Quote Originally Posted by billb
    ...but your problem may not just be O2 sensor. Code 1222 can indicate O2 sensor out of range, which could mean massive vacuum leak. Check all your vacuum hoses first, including the plenum hose from the airbox to the throttle body, for leaks or cracks. Then search here for code 1222 issues. You'll find a lot.
    I noticed today that the crank case hose had come loose, would this cause it? Also, the car is really low on gas due to me taking it off my insurance and it being garaged.

    Black 1995 525i 100K Mi
    Nat1

  4. #4
    Join Date
    Dec 2003
    Location
    Eastern Tennessee USi
    Posts
    14,724

    Default

    thats most likly the problem
    Quote Originally Posted by nmwaldron
    I noticed today that the crank case hose had come loose,
    95 E34 530I V2.37
    ===========
    Those who make peaceful revolution impossible will make violent revolution inevitable.

    John F. Kennedy

  5. #5
    Join Date
    Jan 2004
    Location
    NC
    Posts
    755

    Default ditto what Jeff said

    Quote Originally Posted by 632 Regal
    thats most likly the problem
    yepper
    Bill B.
    95 525i


  6. #6
    Join Date
    Dec 2003
    Location
    PA
    Posts
    5,403

    Default

    Yep but a vacuum leak would generally idle slightly different - but with you garaging it you may or may not notice it.

  7. #7
    Join Date
    Sep 2006
    Location
    Erie, PA
    Posts
    65

    Default

    Quote Originally Posted by billb
    yepper
    I wish that were the case, but after I reseated the hose, the code and light were still there.

    Black 1995 525i 100K Mi
    Nat1

  8. #8
    Join Date
    Dec 2003
    Location
    PA
    Posts
    5,403

    Default

    That code will be there for like 100 miles. Clear the codes!

    Or, simply replace the O2 sensor for like $65 as precaution - it prob needs it if it ISNT failed.

  9. #9
    Join Date
    Sep 2006
    Location
    Erie, PA
    Posts
    65

    Default

    Quote Originally Posted by Jon K
    That code will be there for like 100 miles. Clear the codes!

    Or, simply replace the O2 sensor for like $65 as precaution - it prob needs it if it ISNT failed.
    I know on the e34 m50, there's only supposed to be one o2 sensor, but everytime I try to search for one, it offers front or back. Any ideas?

    Nate

    Black 1995 525i 100K Mi
    Nat1

  10. #10
    Join Date
    Dec 2003
    Location
    PA
    Posts
    5,403

    Default


Page 1 of 2 12 LastLast

Similar Threads

  1. Throwing Code 1222
    By Golgade in forum 5 Series BMW
    Replies: 4
    Last Post: 10-27-2008, 12:02 AM
  2. got code 1222, what should i do fist?
    By gsotis in forum 5 Series BMW
    Replies: 6
    Last Post: 07-21-2008, 06:51 PM
  3. Code 1222 - ? Replaced O2 sensor
    By scott 4991 in forum 5 Series BMW
    Replies: 11
    Last Post: 11-18-2007, 03:52 PM
  4. more help rough idle, CEL, code 1222
    By duckloads in forum 5 Series BMW
    Replies: 8
    Last Post: 08-29-2005, 05:27 PM
  5. M20: Bad ICV consistent with 1222 code? nt
    By Warren N.CA in forum 5 Series BMW
    Replies: 0
    Last Post: 06-14-2004, 03:53 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
  •