o2 sensor

Discussion in 'Engine, Fuel and Exhaust' started by Duane53, Aug 27, 2015.

  1. Duane53

    Duane53 Active Member

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    I have a question about the O2 sensors. Would a bad sensor kill the gas mileage? I have an 08 CVO Ultra and the gas mileage has gone south on me. I didn't have the check engine light come on although there is a code saying rear sensor lean. I just thought I would check and see what your thoughts were on this.
    Thank You
    Duane
     
  2. Jeff Klarich

    Jeff Klarich Well-Known Member Contributor

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    Is your scoot stock or what if any mods have been done? I would think if the 02 sensor is bad your check engine light would come on as well as a code.
     
  3. Jack Klarich

    Jack Klarich Expert Member

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  4. Duane53

    Duane53 Active Member

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    the bike is stock except for some Big Louie slip on's.
     
  5. HDDon

    HDDon Experienced Member Contributor Retired Moderators

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    Great read Jack. This needs to be added to the self help section.
     
  6. Duane53

    Duane53 Active Member

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    That was an interesting article.