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P0401 Prius 2010

Discussion in 'Gen 3 Prius Care, Maintenance & Troubleshooting' started by Mike 777, Mar 24, 2016.

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  1. jdcollins5

    jdcollins5 Senior Member

    Joined:
    Aug 30, 2009
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    Location:
    Wilmington, NC
    Vehicle:
    2010 Prius
    Model:
    III
    From 2010 Repair Manual:

    DTC P0401:


    Exhaust Gas Recirculation - Flow Insufficient Detected

    - EGR valve assembly

    - EGR passage

    - EGR with cooler pipe subassembly

    - Manifold absolute pressure sensor


    DESCRIPTION


    The manifold absolute pressure sensor detects pressure inside the intake manifold as an absolute pressure with a

    built-in sensor and outputs a voltage. Based on the voltage from the manifold absolute pressure sensor, the

    ECM controls the EGR, purge VSV, and detects errors in the pressure sensor using the changes in pressure.
     
    #21 jdcollins5, Mar 27, 2016
  2. Mike 777

    Mike 777 Junior Member

    Joined:
    Mar 24, 2016
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    Location:
    Los Angeles
    Vehicle:
    2010 Prius
    Model:
    III
    Do you know what kind of cleaner?
     
    #22 Mike 777, Mar 27, 2016
  3. Mendel Leisk

    Mendel Leisk Senior Member

    Joined:
    Oct 17, 2010
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    Location:
    Greater Vancouver, British Columbia, Canada
    Vehicle:
    2010 Prius
    Model:
    Touring
    With your mileage the EGR cooler could very well be clogged. A few owners are reporting this. That's the component at the head of the circuit, connecting to the exhaust mainifold, and with 4 coolant lines.
     

    Attached Files:

    #23 Mendel Leisk, Mar 29, 2016
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