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  1. priusboi83702
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    P0401 code after cleaning

    Thanks for the help Mendel. The lye solution and enthusiastic use of a pressure washer made the cooler much cleaner. Intake manifold, pipe, and...
    Post by: priusboi83702, Nov 16, 2025 in forum: Gen 3 Prius Care, Maintenance & Troubleshooting
  2. priusboi83702
    Post

    P0401 code after cleaning

    Hello there, 2010 Prius with ~195k miles. I cleaned the EGR cooler, EGR pipe, EGR valve, and air intake manifold (including the EGR ports). I...
    Post by: priusboi83702, Nov 4, 2025 in forum: Gen 3 Prius Care, Maintenance & Troubleshooting
  3. priusboi83702
    Post

    P0401 code after cleaning

    Hi Seymour1- did you ever solve this issue? This seems exactly what’s happening to me right now (2010 with 195k miles) but I was careful to remove...
    Post by: priusboi83702, Oct 26, 2025 in forum: Gen 3 Prius Care, Maintenance & Troubleshooting
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