Just Commodores Forum Community

It takes just a moment to join our fantastic community

Register

How to Replace Oxygen Sensors/O2 Sensors

Discussion in 'VT - VX Holden Commodore (1997 - 2002)' started by JamesD, Mar 28, 2014.

  1. JamesD

    JamesD Member

    Messages:
    71
    Likes Received:
    2
    Trophy Points:
    8
    Joined:
    Feb 26, 2014
    Location:
    Melbourne
    Members Ride:
    VX Executive Series 2 (2001)
    Hi,

    I currently own a 2001 Holden Commodore VX Sedan. Took it in for a service this afternoon (28/03/14). I was told that one of my O2 sensors isn't as responsive as the other one (There are only two apparently). I was quoted $120 per sensor, however I was advised that I should get both done otherwise they will be out of sync.

    As I want to save a bit of money, I'd rather attempt to replace them myself, plus I can get both sensors for roughly $80 (For both sensors, not each)
    I was told by someone that they aren't too hard to replace, and may only take about 5 minutes each to replace (Give or take).

    I'm just wondering whether anyone can provide me a step-by-step list of instructions on how to replace the oxygen sensor on my particular Holden. I also need to know where sensors are located (On Exhaust?). I've tried searching for this information to no avail, hence why I'm wondering whether someone can help me out.

    Thank you in advance.

    Cheers,
    James.D
     
  2. dirty hands

    dirty hands Active Member

    Messages:
    1,445
    Likes Received:
    11
    Trophy Points:
    38
    Joined:
    Nov 25, 2013
    Location:
    ipswich qld
    Members Ride:
    magna
    they are on the exhaust... .. underneath is best

    they both are different both sides (different length wires ..no to be swapped)

    just depends how long they have been on the pipe as to how easy they are to undo

    good luck
     
    Last edited: Mar 29, 2014
  3. BoostedDave

    BoostedDave New Member

    Messages:
    66
    Likes Received:
    0
    Trophy Points:
    0
    Joined:
    Oct 30, 2007
    Location:
    Sunshine Coast, QLD
    Members Ride:
    VXII R8
  4. acarmody

    acarmody Donati..Whoa Green

    Messages:
    5,920
    Likes Received:
    41
    Trophy Points:
    48
    Joined:
    Apr 29, 2007
    Location:
    Brisbane
    Members Ride:
    VX Berlina
    Put car on stands/ramps, unclip wiring harness about 30cm up from sensors. Use spanner and unscrew. Screw new sensor in and tighten. Clip wiring in. Done. Beer time. Its that easy.
     
  5. accentstencil

    accentstencil Well-Known Member

    Messages:
    7,811
    Likes Received:
    238
    Trophy Points:
    63
    Joined:
    Jun 30, 2005
    Location:
    Eschol Park, Sydney
    Members Ride:
    WH II Caprice, 5.7
    I would advise against buying $40 oxygen sensors, unless they are a well known brand and you are getting them really cheap. Cheap ebay sensors will most likely not last long, from my experience anyway.
     
  6. Nut Kracker

    Nut Kracker Kamikraze

    Messages:
    4,749
    Likes Received:
    115
    Trophy Points:
    63
    Joined:
    Oct 18, 2012
    Location:
    Echuca Vic.
    Members Ride:
    VT SS 304ci (195i)
    I replaced my o2's a while ago.
    Got them from Repco for around $40 each, while Holden wanted $80 each.
    Haven't had any trouble, but yes, watch out for ebay ones as accentstencil advises
     
  7. Husky

    Husky Active Member

    Messages:
    985
    Likes Received:
    29
    Trophy Points:
    28
    Joined:
    Feb 5, 2013
    Location:
    Pakenham
    Members Ride:
    VXII L67 Berlina Wagon and VEIISSV M6 Sportswagon
    Please don't buy cheap O2 sensors, as they will fail and will cause you to burn more fuel. Getting both from holden should run you about $95 each. I got quoted $200 inc postage from Windsor Holden on eBay. As described earlier they are easy to change, you'll just need a set of spanners and ramps or stands. Also check your sensors first, you'll most likely need the TWO wire O2 sensors, as opposed to the often sold 4 wire ones.

    Can I ask what brand? I'm sure some are decent, just not the generic eBay ones.
     
  8. Darcon666

    Darcon666 Evil is always around you

    Messages:
    621
    Likes Received:
    17
    Trophy Points:
    18
    Joined:
    Jun 16, 2010
    Location:
    At home
    Members Ride:
    The Wife
  9. Nut Kracker

    Nut Kracker Kamikraze

    Messages:
    4,749
    Likes Received:
    115
    Trophy Points:
    63
    Joined:
    Oct 18, 2012
    Location:
    Echuca Vic.
    Members Ride:
    VT SS 304ci (195i)
    Yes you can ask.....but sorry, I don't remember the brand.
    Though I'm sure they were Australian made.
     
  10. st3r3otyp3

    st3r3otyp3 Donating Member

    Messages:
    2,000
    Likes Received:
    14
    Trophy Points:
    38
    Joined:
    Feb 13, 2008
    Location:
    WA bruz
    Members Ride:
    VX HSV VX SS
    First thing find out hat type you need slide under there and suss out the connector see if it 2 or 4 wire, order a known brand like, NTK (NGK), Borg Warner, Bosch, all are around $50-$60ea delivered, do not touch the 3 letter brand name starting with P and has a Australia symbol on the green/black box they are ****.
     
  11. accentstencil

    accentstencil Well-Known Member

    Messages:
    7,811
    Likes Received:
    238
    Trophy Points:
    63
    Joined:
    Jun 30, 2005
    Location:
    Eschol Park, Sydney
    Members Ride:
    WH II Caprice, 5.7
    Couldn't agree more. Their prices are ridiculous.
     
  12. JamesD

    JamesD Member

    Messages:
    71
    Likes Received:
    2
    Trophy Points:
    8
    Joined:
    Feb 26, 2014
    Location:
    Melbourne
    Members Ride:
    VX Executive Series 2 (2001)
    Thanks guys

    I'll attempt to do it myself, if not I'm sure I can find someone else to do it. I was quoted $61.50 for NTK O2 Sensors from Repco (Which to my knowledge are meant to be good?)

    Cheers guys.
     
  13. st3r3otyp3

    st3r3otyp3 Donating Member

    Messages:
    2,000
    Likes Received:
    14
    Trophy Points:
    38
    Joined:
    Feb 13, 2008
    Location:
    WA bruz
    Members Ride:
    VX HSV VX SS
    I`ve got one NTK on my V8 and it fixed the issue (black smoke) immediately and has been in for 12 months all good, (should last 80k)
     
  14. SavVYute

    SavVYute Active Member

    Messages:
    1,330
    Likes Received:
    18
    Trophy Points:
    38
    Joined:
    Nov 26, 2009
    Location:
    Townsville
    Members Ride:
    VY S V6 Ute Series II 2004
    A couple of questions.

    How do techs determine that one O2 sensor's a dud and not as responsive as the other?

    And if one bank of cylinders is running too rich or too lean...would that make the O2 sensor on that side appear lazy because it was locked to one end of the voltage scale?
     
  15. Drewie

    Drewie Active Member

    Messages:
    971
    Likes Received:
    42
    Trophy Points:
    28
    Joined:
    Jul 9, 2005
    Location:
    East of Melbourne
    Members Ride:
    VX SS (Original owner).
    The mechanic I have been using showed me that one of the 02 sensors on my VX SS is a bit slow to react to a change in throttle settings, the tuning tool he had hooked up (I think it may have been VCM suite) showed both sensors as a graph running across the display screen on the unit he had hooked up, at a steady throttle both graphs looked the same but when the revs were dropped or increased one of the graphs reacted a lot faster than the other, so I assume that is how they tell one is a bit on the lazy side, I got quoted approx $200 plus fitiing, car is running fine no dash lights or anything, maybe it is using a tad more fuel around town, been a bit hesitant to spend the cash for maybe no improvement.
     
  16. BoostedDave

    BoostedDave New Member

    Messages:
    66
    Likes Received:
    0
    Trophy Points:
    0
    Joined:
    Oct 30, 2007
    Location:
    Sunshine Coast, QLD
    Members Ride:
    VXII R8

    Just do it yourself, it's pretty much the same level of knowledge required to change your engine oil. As per above though, don't skimp on parts, otherwise you will end up paying twice..
     
  17. NeddyBear

    NeddyBear Veteran Mountain Biker

    Messages:
    1,357
    Likes Received:
    143
    Trophy Points:
    63
    Joined:
    May 5, 2011
    Location:
    Queensland
    Members Ride:
    2004 Subaru Outback 2.5 & 2002 VX II Acclaim
    What do the oxygen sensors do?
     
  18. acarmody

    acarmody Donati..Whoa Green

    Messages:
    5,920
    Likes Received:
    41
    Trophy Points:
    48
    Joined:
    Apr 29, 2007
    Location:
    Brisbane
    Members Ride:
    VX Berlina
    Measures oxygen levels in the exhaust gases.
     
  19. Nathan kenny

    Nathan kenny New Member

    Messages:
    13
    Likes Received:
    0
    Trophy Points:
    1
    Joined:
    Jun 6, 2017
    Location:
    Queensland
    Members Ride:
    96 vs commodore
    I have a 96 vs commie can someone tell me wat size spanner on the 02 sensors I have to change both of mine
     
  20. ephect

    ephect Donating Member

    Messages:
    4,780
    Likes Received:
    440
    Trophy Points:
    83
    Joined:
    Jul 27, 2006
    Location:
    Melbourne
    Members Ride:
    VS Acclaim V6
    from memory it's either 17 or 19 but stuck your head under and try see what fits
     

Share This Page