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Thread: P0155?'s

  1. #1
    Legend

    Join Date
    Feb 2008
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    Red Wing, Minnesota, United States
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    Default P0155?'s

    Ok so for the last week I was thinking maybe my cats were on the way out. Today I started the truck and [COLOR=blue! important][COLOR=blue! important]engine [COLOR=blue! important]light[/COLOR][/COLOR][/COLOR] was on and code P0155 was thrown, its says [COLOR=blue! important][COLOR=blue! important]O2 [COLOR=blue! important]sensor[/COLOR][/COLOR][/COLOR]
    bank 2 sensor 1. Could this be a culprit to loss of [COLOR=blue! important][COLOR=blue! important]performance[/COLOR][/COLOR], what does the O2 sensor tell the [COLOR=blue! important][COLOR=blue! important]engine[/COLOR][/COLOR] to do? My other question is how long does this have to be a problem before the computer activates the [COLOR=blue! important][COLOR=blue! important]check [COLOR=blue! important]engine[/COLOR][/COLOR][/COLOR] light?
    99 K1500 Suburban LT "THE BEAST"
    Hypertech III, K&N, true dual
    285/75/16
    ___________________________
    Jason

  2. #2
    Legend

    Join Date
    Aug 2008
    Location
    East of Branson, Missouri
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    Default

    We just had a post up that explained o2 sensors.

    You can find it here.

    Bank 1 is driver's side, Bank 2 is Passenger's side.

    Sensor 1 is up (forward) of the cats, sensor 2 is down from the cat (nearer the tailpipe)
    Steven



    "The Sarge"
    1999 Chevy Suburban LT- K2500
    7.4 454 Vortec, 4WD
    305/70/16 on Eagle Alloy




  3. #3
    Master Mechanic
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    Oct 2008
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    Brandon, FLA
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    Default

    So, you were paying attention in class today...........Ha, Good Job.

    Jeff
    JMoney02

  4. #4
    Legend

    Join Date
    Feb 2008
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    Red Wing, Minnesota, United States
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    Default

    So I figured it out, but now the current O2 sensor will not break free, but my number four spark plug was very nasty, so I am hoping that was causing the sensor to throw a code. No black or oil just alot more white and corroded looking then the other seven

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