Code p219A air fuel ratio imbalance

Discussion in 'Engine & Drivetrain' started by Steveo63088, Feb 18, 2018.

  1. Steveo63088

    Steveo63088 TYF Newbie

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    I have a 2017 GMC Yukon with the 5.3. I have a 3inch exhaust with magnaflow muffler, AFE CAI and diablo sport tune.

    I got the P219A code. I figured I might have bad gas so I took the tube off. Code came back. I checked my intake all of the connections are tight there so I’m assuming it’s the O2 sensor but before I dive into that I was wondering if anyone else has had this issue.
     
  2. ayhetherington

    ayhetherington TYF Newbie

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    Did you ever discover what the issue was?
     

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