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Getting P219A code (but that is only code)

Discussion in 'Gen 3 Prius Main Forum' started by GreenTerrorPrius, Jul 1, 2024.

  1. GreenTerrorPrius

    GreenTerrorPrius Junior Member

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    Check engine light came on, So took to an Advance to run scan and the P219A code came up so took it to dealership. Day before I dropped it off, the code went away but did come on again when Dealer looked at it but went away again for most of the time at the dealership (2 days)s
    They had a hard time finding anything wrong with it. They kept it 2 days as they said they really wanted to see another code come up to help trouble shoot it.
    The 2 days it was there the check engine light went off, but re appeared just 1 day after leaving the dealership.
    The dealer says some type of cylinder imbalance and he tested it out both hot and cold, but he seemed preplexed as looking for another code to help him troubleshoot.

    So just left the dealer after an oil change, and as I said the light is back on.
    Any thoughts, I think dealer afraid I may have a head gasket issue down the line.
     
    #1 GreenTerrorPrius, Jul 1, 2024
  2. bisco

    bisco cookie crumbler

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    #2 bisco, Jul 1, 2024
  3. ChapmanF

    ChapmanF Senior Member

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    Given that the code is about an imbalance of the air/fuel mixture reaching the four cylinders, I think I would start with the less-scary and more-obvious ideas like the fuel injectors (there's one per cylinder), or an unmetered air leak through the intake manifold gasket near just one port, a hole in the manifold, that sort of thing.

    There just aren't a whole lot of other stories you can think of whose punch line would be an air/fuel mixture imbalance across cylinders.
     
    #3 ChapmanF, Jul 1, 2024
  4. douglasjre

    douglasjre Senior Member

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    Who's in charge of the diagnostics?
     
    #4 douglasjre, Jul 2, 2024
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