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P0158 Check Engine Light

Discussion in '2nd Gen. Tacomas (2005-2015)' started by blackbirdmach6, Aug 9, 2016.

Page 2 of 2
  1. Aug 1, 2025 at 6:01 AM
    #21
    Dm93

    #21
    Dm93 Test Don't Guess

    Joined:
    Mar 3, 2015
    Member:
    #150066
    Messages:
    13,916
    Gender:
    Male
    Texas
    Vehicle:
    2014 DC OR 6spd 4x4
    Predator tube steps, Ranch Hand grill guard, Magnaflow CatBack exhaust, Toyota tool box & bed mat, 2LO Module by @Up2NoGood, Rearview Compass/Temp Mirror, Tune by @JustDSM.
    I've found that a high voltage code for the downstream sensor is often caused by a biased lean upstream AFR sensor.

    Need to graph AFR, O2, and Fuel Trims to confirm.
     
    Dm93, Aug 1, 2025
    #21
    Sailor_Nick[QUOTED] likes this.
Page 2 of 2

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