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P219A Air fuel ratio sensor?

Discussion in 'Gen 1 Prius Plug-in 2012-2015' started by 14pr1us, Dec 7, 2020.

  1. 14pr1us

    14pr1us New Member

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    I have the code P219A for a air fuel ratio sensor. Mileage is at 152k, changed spark plugs and cylinder 1 coil park, atf change and coolant change.

    Do you think its the sensor that is going out or the egr and intake needs to be clean or both?



    Thank you
     
    #1 14pr1us, Dec 7, 2020
  2. bisco

    bisco cookie crumbler

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    tech stream?

    certainly worth taking a peek inside the circuit
     
    #2 bisco, Dec 7, 2020
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  3. ETC(SS)

    ETC(SS) The OTHER One Percenter.....

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    I would check both, but verifying the EGR isn’t plugged and checking for signs of a head gasket failure trumps the intake for right now.
     
    #3 ETC(SS), Dec 7, 2020
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  4. 14pr1us

    14pr1us New Member

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    thank you for your inputs, i will check it out. the light disappeared on its own after two days. gonna wait and see what happens
     
    #4 14pr1us, Dec 9, 2020
  5. 14pr1us

    14pr1us New Member

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    The air fuel ratio sensor was pretty expensive about $150, so I decided to check out the egr and intake first. Remove and found out it was clogged. Cleaned the tube and manifold and now drives better and check engine light is gone. Looks like clogged intake and egr will cause the air fuel ratio sensor engine code to come on.
     

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    #5 14pr1us, Dec 25, 2020
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