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Thread: Bad 02???

  1. #1
    Tuner
    Join Date
    Sep 2021
    Location
    Yorba Linda
    Posts
    80

    Bad 02???

    Can one of you guys tell me if my bank 1 02 is going bad or is bad? on the log it appeared to be adding a ton of fuel and it also threw a code for a bank 1 sensor 1 02 . I do notice now when i get on it it smells pretty rich

    Thank you in advance !!!
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  2. #2
    Tuning Addict 5FDP's Avatar
    Join Date
    May 2012
    Location
    Rogers, MN
    Posts
    13,564
    Would be helpful if you logged the o2 sensor so you could see what the voltage is doing.

    Per that log bank 1 was super lean right away then later it was not as lean. So it's possible it's an o2 sensor problem you there is a vacuum leak/exhaust leak on that side too.
    2016 Silverado CCSB 5.3/6L80e, not as slow but still heavy.

    If you don't post your tune and logs when you have questions you aren't helping yourself.