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Front Oxy Sensor: easy install? V70-XC70 1998

posted by  Velomind on  Thu Jun 12 10:59 CST 2003
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How easy is replacing the front oxygen sensor. Check engine light code indicates front sensor bad. Reset light and now after 6 hours driving it's back on.

Will the check engine light turn off if I replace the sensor?

Getting ready for the 1,000 mile vacation drive . . .








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    Front Oxy Sensor: easy install? V70-XC70 1998

    posted by  kshaw on  Sat Jun 14 07:07 CST 2003
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    last visit: Wed Oct 29 13:11 CST 2008
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    Haven't done it on the Volvo yet but is generally like replacing a spark plug. Spray with PB Blaster or WD-40 first; because of the heat these sometimes are hard to get out. If the new oxygen sensor is not already precoated, apply a small amount of antiseize on the treads, using great care not to get any antiseize on the tip. (If you get antiseize on the tip, it will destroy the oxygen sensor.) You may want to clean the harness plug with an electrical cleaner because bad connections can affect operation and trip the "check engine" light codes. Torque to mfg specifications.








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      Front Oxy Sensor: easy install? V70-XC70 1998

      posted by  Drej1 on  Mon Jun 16 02:20 CST 2003
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      FYI,
      I have a 98 and it being a turbo has some challenges , but with the above procedure (from under the car)I used a ext.with a "crow's" foot and it came right off. (I also hit it a few times with an air hammer to loosen it up.) you can also heat the O2 bung up with a torch to loosen it. NOW the hard part I had was those darn connectors. (See vol...speed site for some more help.
      D~







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