So many codes of Prius c

Discussion in 'Prius c Technical Discussion' started by Ohid, Sep 19, 2021.

  1. Ohid

    Ohid Junior Member

    Joined:
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    Location:
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    Vehicle:
    2015 Prius Alpha
    Model:
    N/A
    Prius c 2013, 79k km. Showed overheating, engine check light and hybrid malfunction signal on the dash. Car stalled on the road. After 30 minutes, it started again and run fine. Next morning all the signals gone. One week later it has scanned by obd2 scanner and found following codes:

    Car Scanner ELM OBD2
    DTC report
    Selected brand: Toyota

    ============1==============
    P3190
    Raw code: 3190
    ECU: Engine control unit
    Status: Confirmed
    Toyota: Poor Engine Performance; Poor Engine Power (Pri)

    ============2==============
    P0A0F
    Raw code: 0A0F
    ECU: 7EA
    Status: Confirmed
    OBDII: Hybrid drive system - engine failed to start

    ============3==============
    U0129
    Raw code: C129
    ECU: 7EA
    Status: Confirmed
    OBDII: Data bus, brake system control module - no communication

    ============4==============
    P3190
    Raw code: 3190
    ECU: Engine control unit #1
    Status: Confirmed
    Toyota: Poor Engine Performance; Poor Engine Power (Pri)

    ============5==============
    U0073
    Raw code: C073
    ECU: ABS control unit #2
    Status: Confirmed
    OBDII: Control module - data bus Off

    ============6==============
    U0124
    Raw code: C124
    ECU: ABS control unit #2
    Status: Confirmed
    OBDII: Data bus, lateral acceleration sensor module - no communication

    ============7==============
    U0126
    Raw code: C126
    ECU: ABS control unit #2
    Status: Confirmed
    OBDII: Data bus, steering position sensor control module - no communication

    ============8==============
    U0293
    Raw code: C293
    ECU: ABS control unit #2
    Status: Confirmed
    OBDII: Lost communication with hybrid powertrain control module

    ============9==============
    P0A0F
    Raw code: 0A0F
    ECU: Hybrid engine system
    Status: Confirmed
    OBDII: Hybrid drive system - engine failed to start

    ============10==============
    U0129
    Raw code: C129
    ECU: Hybrid engine system
    Status: Confirmed
    OBDII: Data bus, brake system control module - no communication

    ============11==============
    U0100
    Raw code: C100
    ECU: BCM #1/Convenience systems
    Status: Confirmed
    OBDII: Data bus, engine control module (ECM) A - no communication

    ============12==============
    U0101
    Raw code: C101
    ECU: BCM #1/Convenience systems
    Status: Confirmed
    OBDII: Data bus, transmission control module (TCM) - no communication

    ============13==============
    U0151
    Raw code: C151
    ECU: BCM #1/Convenience systems
    Status: Confirmed
    OBDII: Data bus, supplementary restraint system (SRS) control module - no communication

    ============14==============
    U0155
    Raw code: C155
    ECU: BCM #1/Convenience systems
    Status: Confirmed
    OBDII: Data bus, instrumentation control module - no communication

    ============15==============
    U0164
    Raw code: C164
    ECU: BCM #1/Convenience systems
    Status: Confirmed
    OBDII: Data bus, AC control module - no communication

    ============16==============
    U0327
    Raw code: C327
    ECU: BCM #1/Convenience systems
    Status: Confirmed
    OBDII: Software incompatibility - alarm system control module

    ============17==============
    U0293
    Raw code: C293
    ECU: BCM #1/Convenience systems
    Status: Confirmed
    OBDII: Lost communication with hybrid powertrain control module

    ============18==============
    U0120
    Raw code: C120
    ECU: BCM #1/Convenience systems
    Status: Confirmed
    OBDII: Lost communication with starter/generator control module

    ============19==============
    B1242
    Raw code: 9242
    ECU: Entry & start / Smart key
    Status: Confirmed
    Toyota: Wireless Door Lock Tuner Circuit Malfunction (WIRELESS DOOR LOCK RECEIVER) / 42

    ============20==============
    U0100
    Raw code: C100
    ECU: Entry & start / Smart key
    Status: Confirmed
    OBDII: Data bus, engine control module (ECM) A - no communication

    ============21==============
    U0142
    Raw code: C142
    ECU: Entry & start / Smart key
    Status: Confirmed
    OBDII: Data bus, body control module (BCM) B - no communication

    ============22==============
    U0155
    Raw code: C155
    ECU: Entry & start / Smart key
    Status: Confirmed
    OBDII: Data bus, instrumentation control module - no communication

    ============23==============
    U0293
    Raw code: C293
    ECU: Entry & start / Smart key
    Status: Confirmed
    OBDII: Lost communication with hybrid powertrain control module

    ============24==============
    U0140
    Raw code: C140
    ECU: Power source control
    Status: Confirmed
    OBDII: Data bus, body control module (BCM) - no communication

    ============25==============
    U0155
    Raw code: C155
    ECU: Power source control
    Status: Confirmed
    OBDII: Data bus, instrumentation control module - no communication

    ============26==============
    U0293
    Raw code: C293
    ECU: Power source control
    Status: Confirmed
    OBDII: Lost communication with hybrid powertrain control module


    Please suggest from where we start to identify the real culprits. Thanks.
     
    #1 Ohid, Sep 19, 2021
    Last edited: Sep 19, 2021
  2. dig4dirt

    dig4dirt MoonGlow

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    How old is your 12v battery? have you tested it recently?
     
  3. Ohid

    Ohid Junior Member

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    Model:
    N/A
    its Japanese 2013 model. Original one.
     
  4. dig4dirt

    dig4dirt MoonGlow

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    Two
    Focus on load testing that battery.....

    More than likely 8 years is a very good run for it.

    A low or almost gone 12v battery will throw codes and give all kinds of issues and seem you have that issue
     
    Ohid likes this.
  5. ChapmanF

    ChapmanF Senior Member

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    Vehicle:
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    Model:
    IV
    There are a lot of communication errors listed there. If those are consistently reported, that's where I would start looking.

    But first, this bit of the history: "Showed overheating, engine check light and hybrid malfunction signal on the dash. Car stalled on the road."

    It can be a very good idea to stop right away when an overheat warning is shown, even if only so you can find out what is overheating. In a hybrid, there's more than one possibility.

    What I suspect happened is the power electronics overheated (sometimes this is because of a pump that wears out), and later shut down to protect themselves, and then nothing was charging the 12 volt battery in the back. Then you just kept driving the car on what charge there was in the 12 volt battery, until it finally pooped out (much like a spring break trip I took once). If that's what happened, the communication error codes were the last words of all the car's computers as they dropped offline.
     
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