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Diagnostic codes

Discussion in 'Gen 2 Prius Technical Discussion' started by tkowalski, Dec 12, 2010.

  1. tkowalski

    tkowalski New Member

    Joined:
    Dec 12, 2010
    2
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    Location:
    Tn
    Vehicle:
    2004 Prius
    Model:
    N/A
    Looked around and could not find info on 2 codes. 2004 Prius : P0420 and U0293. One I believe is lost communication w/ hybrid system. Are these serious?
     
    #1 tkowalski, Dec 12, 2010
  2. jdcollins5

    jdcollins5 Senior Member

    Joined:
    Aug 30, 2009
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    Location:
    Wilmington, NC
    Vehicle:
    2010 Prius
    Model:
    III
    I have the codes for the 2010 but not the 2004. I do not know if they are the same or not but will list what I have.


    DTC CODE
    DETECTION ITEM
    TROUBLE AREA
    MIL
    MEMORY
    DTC FOR MEXICO MODELS


    U0293
    Lost Communication with HV ECU
    - Wire harness
    - Power management control ECU
    Comes on
    DTC stored
    Applies


    P0420
    Catalyst System Efficiency Below Threshold (Bank 1)
    - Gas leaks from exhaust system
    - Air fuel ratio sensor (sensor 1)
    - Heated oxygen sensor (sensor 2)
    - Front exhaust pipe assembly (TWC: Front and rear catalyst)
    - EGR valve assembly
    Comes on
    DTC stored
    Applies

    I hope this helps.
     
    #2 jdcollins5, Dec 12, 2010
  3. xs650

    xs650 Senior Member

    Joined:
    Jul 2, 2010
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    Location:
    Northern California
    Vehicle:
    2010 Prius
    Model:
    II
    Lacking a complete manual, if you plug your trouble codes into Google you can usually do OK. I got some hits for your generation Prius on Google.
     
    #3 xs650, Dec 12, 2010
  4. tkowalski

    tkowalski New Member

    Joined:
    Dec 12, 2010
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    0
    0
    Location:
    Tn
    Vehicle:
    2004 Prius
    Model:
    N/A
    Thanks I'll check them out
     
    #4 tkowalski, Dec 14, 2010
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