EGR/Intake Manifold Cleaning

Discussion in 'Gen 3 Prius Care, Maintenance & Troubleshooting' started by Dave1UK, Aug 17, 2026 at 6:11 AM.

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  1. ChapmanF

    ChapmanF Senior Member

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    "Can the MAP sensor sense MAP when there's oil on it?" would be my first question. If I looked at the reading with the engine off and it was kinda close to what my local weather service was saying, and then it went down with the engine idling, I'd probably leave it alone and call it a day.
     
    #21 ChapmanF, Aug 21, 2026 at 9:09 AM
  2. Dave1UK

    Dave1UK Junior Member

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    So just ran the engine with new coolant and was confused as to the engine light being on, ran diagnostic code check and said MAF/MAP sensor issue. There I was telling myself should of left the MAP sensor alone...turns out I forgot to connect the MAF sensor on the air intake cable back as it was tucked away behind the ribbon! Gave me a right fright.
     
    #22 Dave1UK, Aug 21, 2026 at 9:21 AM
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