Username or Email Address
Do you already have an account?
Forgot your password?
  • Log in or Sign up

    VWVortex


    Results 1 to 19 of 19

    Thread: How many o2 sensors do I have?

    1. 01-31-2007 01:48 AM #1
      Body shop says I need to replace them, I called around and a guy said I have 4 o2 sensors and he quoted me $970 to fix! crazy guy...but Isn't there only 2 o2 sensors? the Pre and Post?

      By the way I have a 2001 12v VR6 if that matters


    2. 01-31-2007 01:56 AM #2
      LOL. .. .I dunno about 4. . . as far as I know there is only 2

    3. 01-31-2007 01:56 AM #3
      why not do it yourself?

      and why is a body shop requesting that you change your o2 sensors?


    4. 01-31-2007 01:58 AM #4
      There are 2, about $150 each. Don't do it unless you know there is a code saying they are bad.

    5. Senior Member bluebora20v's Avatar
      Join Date
      Jun 14th, 2001
      Location
      Bay
      Posts
      31,456
      Vehicles
      2000/VW/MK4 Jetta
      01-31-2007 02:04 AM #5
      Quote, originally posted by DubWarz »
      There are 2, about $150 each. Don't do it unless you know there is a code saying they are bad.

      x2


    6. 01-31-2007 02:07 AM #6
      Quote, originally posted by bluebora20v »

      x2


      ive got none, how about u

    7. 01-31-2007 02:19 AM #7
      Well the codes I got were P0304 and P0420.

      The 304 is for misfire in cylinder 3 and P0420 is Catalyst System: Bank 1: Efficiency Below Threshold

      Im thinking my old o2 sensors are killing my cat conv



    8. 01-31-2007 01:48 PM #9

      Result:
      DTC Code: 16804
      P Code: P0420
      Description: Catalyst System,Bank1 Efficiency Below Threshold
      Comments: (2)
      By: mk3_vdub
      Date: January, 09 2007
      this is the code you will get if your Cat isnt performing correctly. your 2nd(post-cat) o2 sensor could be bad. you will also throw this code if you are running a test pipe. if you are the only way ive come across to use spark plug defoulers like this thread describes: http://forums.vwvortex.com/zerothread?id=1366095
      By: bigmak
      Date: January, 09 2007
      Method for testing the MAF/O2 sensor with a Vagcom: http://forums.vwvortex.com/zerothread?id=1265064


      So its either my cat or o2 sensors right?


    9. 01-31-2007 01:49 PM #10
      If it's yer cat, it is covered under national warranty if yer car is >80k.

    10. 01-31-2007 01:50 PM #11
      nope im at 81k!

    11. 01-31-2007 01:51 PM #12
      Doh. hahah Techtonics sells a cheap high flo cat (if you need one).

      My o2 sensors went at about 80k on my 2000 VR. Easy to fix on yer own if you can get under the car. ECS tuning has both for around 150 total.


    12. 01-31-2007 01:54 PM #13
      can you link me to the techtonics site or any other site with cheap cats


    13. 02-02-2007 12:27 AM #15
      mann I called the guy back and he stil tells me there is 4 o2 sensors on my car...Hes telling me 2 sensors in the engine and 2 on the cat? is that right?

    14. Member nick526's Avatar
      Join Date
      Sep 29th, 2006
      Location
      Los Angeles, CA
      Posts
      2,890
      Vehicles
      78 Rabbit ABF, 96 GTI VR6, 89 BMW 325i, 91 Mitsubishi Mighty Max
      02-02-2007 12:41 AM #16
      There are only two. P0420 is NOT a result of a bad post cat o2. You don't have an o2 code, the ECU tests them before the catalyst monitor is run, so you wouldn't have just the P0420. Face it, MkIV catalysts just suck! The number one code I pull from these Jettas and Golfs is the P0420. It's not the o2 that killed your cat, it's the misfire combined with the already poor quality cat. Replacing your o2s at this point would be nothing more than preventative maintenence! Fix the misfire first!
      RIP: Mk2 jetta (stolen ), Mk4 jetta (side-swiped, totaled ), Mk4 GTI (totaled by teenage girl )

    15. 02-02-2007 12:42 AM #17
      can the cat conv cause misfires?

    16. Member nick526's Avatar
      Join Date
      Sep 29th, 2006
      Location
      Los Angeles, CA
      Posts
      2,890
      Vehicles
      78 Rabbit ABF, 96 GTI VR6, 89 BMW 325i, 91 Mitsubishi Mighty Max
      02-02-2007 01:38 AM #18
      there are many causes of misfires, the cat is definitely not one of them. all the cat does is clean up your exhaust gas. coil packs tend to go bad on these cars quite often, how many miles do you have?
      RIP: Mk2 jetta (stolen ), Mk4 jetta (side-swiped, totaled ), Mk4 GTI (totaled by teenage girl )

    17. Junior Member
      Join Date
      Apr 30th, 2006
      Location
      Sacramento, CA
      Posts
      35
      Vehicles
      2000 VW GTI VR6
      02-02-2007 01:43 AM #19
      What is the difference between the US$150,- mentioned and the US$55,- or US$86,- I have bought? And no need to go thru a dealer if a mechanic minded guy can do it.

    Posting Permissions

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