U0293 vehicle won’t move

Discussion in 'Gen 2 Prius Care, Maintenance and Troubleshooting' started by Stitch, Jun 12, 2026 at 3:30 PM.

  1. Stitch

    Stitch Junior Member

    Joined:
    Jul 29, 2023
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    Location:
    Louisville
    Vehicle:
    2005 Prius
    Model:
    ----USA----
    05 190000mi. Car running fine, no recent work done to it.
    Got in it the other morning, dash lit up and it wouldn’t go into ready mode. All the gear selector boxes were flashing.
    Cleared the U0293 code and it worked fine. Got in it yesterday and same thing, this time clearing code didn’t work. Put in a new 12v battery, no change. Checked the fuses under the hood, all good. $200 harbor freight scanner gives these codes
    Global ob2 is U0293 Lost communication hybrid powertrain control module
    Under gateway is B1260, transmission controller ecu communication stop.
    Under ABS/VSC/TRAC is U0293 lost communication with hybrid vehicle control system and C1242 open circuit in IG1/IG2 power source circuit
    Also under A/C was B1400 normal and B1442 air inlet damper control servo motor? Not sure if they are related to main problem.
    Hybrid battery about 2 years old and inverter pump replaced 18 months ago. Cat and up/downstream o2 sensors replaced about 3 months ago.
    Any ideas? Not sure which direction to go. About to give up and have it towed to stealership.
     
    #1 Stitch, Jun 12, 2026 at 3:30 PM
    MutiVinas likes this.
  2. bisco

    bisco cookie crumbler

    Joined:
    May 11, 2005
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    Location:
    boston
    Vehicle:
    2012 Prius Plug-in
    Model:
    Plug-in Base
    idk, could be corrosion at any of the pin connectors, or vermin chewing on wiring
     
    #2 bisco, Jun 13, 2026 at 2:13 PM
  3. Stitch

    Stitch Junior Member

    Joined:
    Jul 29, 2023
    3
    1
    0
    Location:
    Louisville
    Vehicle:
    2005 Prius
    Model:
    ----USA----
    Thanks, battery voltage was down to 6v this morning. Power button wasn’t turning off power.
    Having it towed to dealer Mon.
     
    #3 Stitch, Jun 13, 2026 at 3:39 PM
  4. MutiVinas

    MutiVinas New Member

    Joined:
    Yesterday
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    Location:
    Poland
    Vehicle:
    2010 Prius
    Model:
    III
    My car throws the exact same persistent U0293 code. In my case, it started after a severe water leak flooded the left side of my trunk where the Battery ECU is located. I drained the water, thoroughly dried out the wiring harnesses, and cleaned all the connectors. I even swapped the Battery ECU with a known-good unit, but nothing changed.
    When I clear the codes and press the Start button, the ICE fires up for about 10-15 seconds with violent engine shaking, and then it completely shuts down and locks itself back to the U0293 code. Also, just like a fail-safe mode, my front radiator fans under the hood blast at maximum speed as soon as I turn on the ignition.


    If you or I figure out which specific wire, hidden junction connector, or fuse is causing this CAN-bus communication loop after a flood/short, let's definitely update each other here. We can solve this together!
     
    #4 MutiVinas, Jun 13, 2026 at 4:34 PM
  5. Stitch

    Stitch Junior Member

    Joined:
    Jul 29, 2023
    3
    1
    0
    Location:
    Louisville
    Vehicle:
    2005 Prius
    Model:
    ----USA----
    Haven’t noticed water inside. Did deal with water leaking in from the hatch strut on the 12v battery side corroding hybrid batt fan connector a few years ago.
    I’ll check other side tomorrow.
     
    #5 Stitch, Jun 13, 2026 at 9:52 PM
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