1. Attachments are working again! Check out this thread for more details and to report any other bugs.

Help...Code u0293...

Discussion in 'Gen 2 Prius Main Forum' started by coachbanks, Jul 13, 2016.

  1. coachbanks

    coachbanks New Member

    Joined:
    Jul 13, 2016
    1
    0
    0
    Location:
    ky
    Vehicle:
    2007 Prius
    Model:
    N/A
    Scanner found u0293,,,recommended reseal power inverter.
    what I have read for two days says its Power source ECU..

    What happened,,,kids was driving car, had 3 phones plugged in, ac, lights, and when she tried to set cruise, car went into limp mode, gear lights flashing,,,went into neutral,,,stop beside highway,,had to be towed.
    12 volt battery charged and tested ok. no blown fuses. I reset ECU by jumping pins 14 and 4. no change, tried master reset by holding brake and power button down, no change..removed ecu fuse to reset, no change.

    tried two scanners, both said same thing and code, the one from advanced auto pulled code and on fix it said "resealed Power Inverter"

    Im really lost
     
    #1 coachbanks, Jul 13, 2016
  2. Kevin_Denver

    Kevin_Denver Active Member

    Joined:
    Mar 18, 2016
    581
    422
    1
    Location:
    Denver, CO
    Vehicle:
    2009 Prius
    Model:
    N/A
    First thing I would try is unplugging the negative on the battery for one minute and then reconnecting to reset everything. If the car does restart, drive carefully to see if error reoccurs. Based on this:https://techinfo.toyota.com/t3Portal/document/rm/RM1290U/xhtml/RM000003VFG006X.html?sisuffix=ff&locale=en&siid=1468434074526
    it sounds like it's either a problem with the cables connecting to the Power Management Control ECU or the PMCECU itself has given up. Have you tried following the 3 steps at the bottom of that page? If something open-circuited or close-circuited that shouldn't have, that could have caused the error you're getting. Sometimes such errors have to be tracked down by testing each wire in a harness to see if it's open or connected to ground or the other end of the cable as expected.
     
    #2 Kevin_Denver, Jul 13, 2016
  3. Bryan R

    Bryan R Junior Member

    Joined:
    Feb 18, 2022
    8
    1
    0
    Location:
    Ocala
    Vehicle:
    2006 Prius
    Model:
    N/A
    Hey Kevin I know it has been years but as we speak I’m having this same problem how do I check wire cables to see if it has a complete ground?
     
    #3 Bryan R, Aug 30, 2024 at 8:37 PM
  4. ChapmanF

    ChapmanF Senior Member

    Joined:
    Mar 30, 2008
    24,434
    15,892
    0
    Location:
    Indiana, USA
    Vehicle:
    2010 Prius
    Model:
    IV
    You might look at this post for a little more info on troubleshooting a U0293. Like the other commUnication codes, there are two ECUs involved: the one U0293 is 'about', and the one that reported the code. Those are the two having trouble communicating with each other. Some scan tools make it easy and some make it hard to see which ECU reported the code.

    "Reseal power inverter" are three words I've never seen next to each other in anything about a U0293 code. I would trust the troubleshooting steps in the repair manual more.

    Toyota Service Information and Where To Find It | PriusChat
     
    #4 ChapmanF, Aug 30, 2024 at 9:53 PM
(You must log in or sign up to post here.)