Hi I have a 2011 Prius 4 ...what do Codes : P0301 & P219A Mean ?

Discussion in 'Gen 3 Prius Care, Maintenance & Troubleshooting' started by Jollymon, Mar 1, 2020.

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  1. Jollymon

    Jollymon Junior Member

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    2011 Prius
    Model:
    Four
    Check engine light came on , had Codes Read @ Advance Auto ... Also car Knocks , Shakes until I'm going over 60 +
    Codes : P0301 & P219A
    What does this mean and what do I need to do ?
    Also what OBD Reader is recommended that I can Purchase ?

    Thanks !
     
    #1 Jollymon, Mar 1, 2020
    Last edited: Mar 1, 2020
  2. Mendel Leisk

    Mendel Leisk Senior Member

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    Could be head gasket failure, at cylinder #1 (passenger side end of engine). How many miles on it? Have you ever cleaned the intake manifold and Exhaust Gas Recirculation components?
     
    #2 Mendel Leisk, Mar 2, 2020
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  3. Priuslover09

    Priuslover09 Member

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    I don’t know Is the gas good?
     
    #3 Priuslover09, Mar 2, 2020
  4. ChapmanF

    ChapmanF Senior Member

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    P0301 means a misfire in cylinder 1, for any of the usual reasons (they don't all have to be THE BLACK DEATH).

    Anybody find P219A in a 2011 manual? It's not in my 2010 book. Was that code read with Techstream, or some other tool?
     
    #4 ChapmanF, Mar 2, 2020
  5. Elektroingenieur

    Elektroingenieur Senior Member

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    The Repair Manual (more info) for 2011 says diagnostic trouble code (DTC) P219A is Bank 1 Air-Fuel Ratio Imbalance. The detection condition is an “air fuel ratio imbalance between the cylinders” that exceeds any of several thresholds.
     
    #5 Elektroingenieur, Mar 3, 2020
  6. ChapmanF

    ChapmanF Senior Member

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    Thanks. I would then suspect that the P219A is simply secondary to the misfiring in cylinder 1, causing an unexpected amount of unburned fuel to be present in the exhaust.
     
    #6 ChapmanF, Mar 3, 2020
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  7. pjksr02

    pjksr02 Active Member

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    How many miles are on the car?
     
    #7 pjksr02, Mar 3, 2020
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  8. Nphra

    Nphra Junior Member

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    Hello did anyone find a resolution for this issue ?
    I have P219A and P0102 similar issue to this.
     
    #8 Nphra, Oct 25, 2021
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