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fuse for O2 sensor heater?

This is a discussion on fuse for O2 sensor heater? within the Technical / Maintenance forums, part of the General Discussion category; Any one know if and where there is a fuse for the heater in the O2 sensors, in a 1999 ...

  1. #1
    Registered User figment3's Avatar
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    fuse for O2 sensor heater?


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    Any one know if and where there is a fuse for the heater in the O2 sensors, in a 1999 tahoe

  2. #2
    Registered User JoeTech's Avatar
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    Re: fuse for O2 sensor heater?

    I don't think there is a fuse for the o2 heater in that year. What kind of problem are you having???

  3. #3
    Diesel Nut justy's Avatar
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    Re: fuse for O2 sensor heater?

    I doubt it has one. I don't even recall a fusible link for o2 sensors.
    Last edited by justy; 11-22-2008 at 09:22 PM.
    Duramax badger truck pullers association.
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    2007 3500HD NBS Duramax
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  4. #4
    Registered User figment3's Avatar
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    Re: fuse for O2 sensor heater?

    got code for heat in O2,just whanted to test ,cant remember how to test sensors themselfs,any one know this?

  5. #5
    Registered User chevy7398's Avatar
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    Re: fuse for O2 sensor heater?

    had the same problem with one of my rear o2s, put two different sets in and still kept popping codes for the heater circit, so i just had them deleted.
    2005 2500hd duramax crew cab 4x4
    1998 ext cab z71 silverado 8in sas 35's
    1973 silverado 9in 38.5 boggers
    1985 gmc siera 4in 36 tsls

  6. #6
    Registered User JoeTech's Avatar
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    Re: fuse for O2 sensor heater?

    Quote Originally Posted by figment3
    got code for heat in O2,just whanted to test ,cant remember how to test sensors themselfs,any one know this?
    you will need a volt/ohm meter. now locate the o2 sensor connector. The black wire on the O2 SENSOR HARNESS SIDE of the connector is the signal wire (this is usually a different wire color on the vehicle wiring harness side) you do not need to check this wire. Disconnect the connector, turn the key on and test the remaining 3 wires on the vehicle harness side, there shoud be 2 grounds and 1 battery voltage.

    o2 sensor heater failures are very common

  7. #7
    Registered User figment3's Avatar
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    Re: fuse for O2 sensor heater?

    so how did you deleat them chevy 7398 ?

  8. #8
    Registered User chevy7398's Avatar
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    Re: fuse for O2 sensor heater?

    custom tune
    2005 2500hd duramax crew cab 4x4
    1998 ext cab z71 silverado 8in sas 35's
    1973 silverado 9in 38.5 boggers
    1985 gmc siera 4in 36 tsls

 

 

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