Civic 3-stage vtec D15B "econo mode" not working

Discussion in 'Car Talk' started by Civicbob, Oct 24, 2019.

  1. Civicbob

    Civicbob Senior Member
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    My car CEL seems to come on when the car is about to switch to lean burn mode, so the ECONO light on the dash does not illuminate. Tailpipe is sooty black and fuel consumption is increased.
     
    #1 Civicbob, Oct 24, 2019
  2. Izso

    Izso Boooooossst
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    Pretty much sounds like a dead O2 sensor
     
    #2 Izso, Oct 25, 2019
  3. Civicbob

    Civicbob Senior Member
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    Ouch! This is a new O2 sensor (NTK) installed about month ago
     
    #3 Civicbob, Nov 9, 2019
  4. vr2turbo

    vr2turbo 5 Year | Silver
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    Cannot check with OBD2?
     
    #4 vr2turbo, Nov 9, 2019
  5. Izso

    Izso Boooooossst
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    If it's new - then you might have an issue with the distributor/coilpacks.
     
    #5 Izso, Nov 12, 2019
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