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Code P0031 Oxygen sensor heater control circuit low

Discussion in '1st Gen. Tacomas (1995-2004)' started by hjordistacoma, Jan 9, 2011.

  1. Jan 9, 2011 at 6:50 AM
    #1
    hjordistacoma

    #1
    hjordistacoma [OP] New Member

    Joined:
    Jan 9, 2011
    Member:
    #48956
    Messages:
    1
    Gender:
    Male
    Vehicle:
    04 Tacoma TRD
    I have a 2004 Tacoma TRD 4WD with 97,000 miles. The engine light comes on very seldom. It came on on Oct. 2 for about 8 miles, Nov 15 for about 6 miles (my daily commute to work), and this past Tuesday Jan. 4 for 12 miles. "Code P0031 Oxygen sensor heater control circuit low" came up at Advanced yesterday. Should I not worry about this yet since the light is not constant and is so seldomly on? Is the computer correcting itself and that is why the light goes off? Is the sensor going bad and not completly shot yet?
    Any insight would be appreciated!
     
    hjordistacoma, Jan 9, 2011
    #1
  2. Apr 3, 2011 at 7:37 PM
    #2
    TacoTaro

    #2
    TacoTaro Well-Known Member

    Joined:
    Mar 7, 2011
    Member:
    #52517
    Messages:
    269
    Gender:
    Male
    Los Angeles
    Vehicle:
    04 DC 4x4
    King Coilovers, Light Racing UCA, OME Dakar leafs w/ extra leaf and SB10" Bilstein 7100's and a U-bolt flip. 4.56's, eLocker rear, ARB front, Marlin rear bumper, ARB Bull Bar w/ Warn M8000. BAMF Sliders. Manual hub conversion with functioning ABS. Tundra front brakes. Manual hub conversion with functioning ABS. SCS F-5's w/ 255/85 Toyo MT's
    I'm having the same issue. What I don't understand is that it would do it after the truck is already warm. Why would you get a sensor heater code when the truck is already hot?
     
    TacoTaro, Apr 3, 2011
    #2
  3. Apr 3, 2011 at 7:46 PM
    #3
    98tacoma27

    #3
    98tacoma27 is going full "SANDWICH" Moderator

    Joined:
    Dec 18, 2008
    Member:
    #11714
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    67,725
    Gender:
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    First Name:
    Ben
    Not Beech Creek
    Vehicle:
    05 Tundra SR5 (+295k AND COUNTING), 2006 F350 King Ranch 6.0L
    Some stuff. Not a lot, just some.
    The AFR (front O2 sensor) has a heating element in the sensor. The element is probably bad. To correct it you should replace the sensor. Use the OEM sensor brand Denso.
     
    98tacoma27, Apr 3, 2011
    #3

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