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Thread: Misfire

  1. #1

    Default Misfire

    hello, I'm getting code p0135b that is causing my engine to missfire and then throws a missfire code. I've checked a ton of things, but don't know how to get rid of this!!!
    I've got a Chevy Suburban 03 AWD 5.3L
    Please help.

  2. #2


    P0135b is the code for the O2 sensor, bank 1 sensor 1. Probably need to replace this O2 sensor. It is the one on the drivers side exhaust closest to the engine.

    99 K 1500 Suburban
    78 Silverado Big 10 w/factory 454
    00 S-10 Blazer
    1976 Trans Am
    1980 Honda CB900 Custom

  3. #3


    I already changed the O2 sensors. Let me know if you think of something else, thank you!

  4. #4


    not to be a pain, but new does not always mean good. i had many new parts that were junk. did you test the old one? you might have a wire or connector issue as well......mike
    Michael Collins
    1993 4X4 Suburban
    many other toys as well

  5. #5

    dwill3015's Avatar
    Join Date
    Jan 2007
    Yacolt, Washington
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    the same thing happened to my wifes 2001 suburban and after much troubleshooting it turned out to be a bad coil pack
    Washington State
    2006 Silverado 2500HD LT3 4X4 CC SB Duramax LBZ
    Tuff Country 6" lift, 35" Toyo M/T's on 20" Ultra Peacemaker wheels, Quadzilla Stealth2 programmer, Diamond Eye 5" cat-back exhaust, factory Special order color Yellow.

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