Software Updates? Reprogram?

Discussion in 'Gen 3 Prius Care, Maintenance & Troubleshooting' started by mattdhurley12, Jan 27, 2017.

  1. mattdhurley12

    mattdhurley12 New Member

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    Hi everyone. Just preparing myself for a bad ECM diagnosis from Toyota. I've been having some misfiring in my engine and random codes (P0138, P0607, P0010, and P0301). The work I've done myself: changed sparkplugs, verified that misfire does not follow coil, cleaned EGR pipe, and replaced VVT solenoid. I've cleared codes a couple of times and the car will drive fine for about a day and the misfire code returns usually with a buddy like O2 sensor or camshaft actuator position circuit open B1. I've done some research and read that a software update could be the culprit. Does anyone have any info on this or a reprogram? I really don't want to have to replace my ECM. Thanks in advance


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    #1 mattdhurley12, Jan 27, 2017
  2. Mendel Leisk

    Mendel Leisk Senior Member

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    How many miles on it?
     
    #2 Mendel Leisk, Jan 27, 2017
  3. mattdhurley12

    mattdhurley12 New Member

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    #3 mattdhurley12, Jan 27, 2017
  4. David Beale

    David Beale Senior Member

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    Is the 12V battery ok? What is the voltage after sitting overnight -before- you put it in "ready". You can measure it at the "boost point" or open the hatch, remove the floor and the battery cover and test on the terminals.

    Often a weak 12V battery will confuse the computers and cause all kinds of extraneous error messages.
     
    #4 David Beale, Jan 27, 2017
  5. Mendel Leisk

    Mendel Leisk Senior Member

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    Using any oil?
     
    #5 Mendel Leisk, Jan 27, 2017
  6. bisco

    bisco cookie crumbler

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    i have never heard of any software updates or reprogramming. can you pick up a salvage ecm?
     
    #6 bisco, Jan 27, 2017
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