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Advice Needed! P0401, P0300, P0301, P0303 Head Gasket and/or EGR?

Discussion in 'Gen 3 Prius Care, Maintenance & Troubleshooting' started by ALTEREG0, Aug 19, 2024.

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  1. ChapmanF

    ChapmanF Senior Member

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    Yes, I'm sure it has something to do with the ECM driving the valve toward closed when the conditions are also very hot and the plastic is soft. In ozmatt's car, the problem began after he made a long, high-speed trip in 40℃ weather.
     
    #81 ChapmanF, Oct 15, 2024 at 5:25 PM
    ALTEREG0 likes this.
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