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Thread: 2013 Sequoia Argument Null error help!!!

  1. 02-17-2025 #1
    e30cabrio
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    2013 Sequoia Argument Null error help!!!

    I have been tuning my Sequoia for 3+ years no issues, yesterday I tried to write a new tune & got Argument Null. I have my truck on a charger, the battery is at 12.5v prior to tuning, I have an MPVI2 and have tried 4 computers, one with beta installed because of this, I have tried 4 different quality cables, have excellent wifi & tried running an ethernet cable, with wifi, I have a minimum of 70Mb, on the cable it was over 200Mb.



    I created a ticket but I assume HPT are closed as it's Potus day.

    Please help
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  2. 02-17-2025 #2
    abc
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    Maybe the file is corrupt? Have you tried writing a known good .HPT file?
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  3. 02-17-2025 #3
    e30cabrio
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    Yes, I tried flashing the current tune, same error.
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  4. 02-18-2025 #4
    abc
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    It looks like it's not seeing the ECM? Are you able to connect and get a log file?

    Have you tried writing calibration only? Try it without the battery charger on?
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  5. 02-18-2025 #5
    e30cabrio
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    I have tried it with & without the charger, I can process all other functions, also, I am not the only one this is happening to, several people on the Tundra forum are seeing this. Guess I have to wait for HPT to get to my ticket.

    It was suggested it might be a location issue so I tried on the VPN, nope, also, it sees the ECM Vin, model, OS info.
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    Last edited by e30cabrio; 02-18-2025 at 09:11 AM.
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  6. 02-21-2025 #6
    e30cabrio
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    Somehow, it seems the OS changed on my file, the solution was a new tune on a new read.
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  7. 02-22-2025 #7
    LilSick
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    well that's fkn scary
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  8. 02-22-2025 #8
    e30cabrio
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    It's freaking weird but it's fixed & I'm good to go.
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  9. 02-26-2025 #9
    Dnlharms
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    I'm having the exact same issue with my 2014 tundra. It worked fine this morning, then I wanted to make a revision but it keeps getting stuck at the processing data stage of the write process and saying argument null.
    Would you mind walking me through how you fixed this? I can't get any of my tunes to write to the pcm.
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  10. 02-26-2025 #10
    Dnlharms
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    Quote Originally Posted by Dnlharms View Post
    I'm having the exact same issue with my 2014 tundra. It worked fine this morning, then I wanted to make a revision but it keeps getting stuck at the processing data stage of the write process and saying argument null.
    Would you mind walking me through how you fixed this? I can't get any of my tunes to write to the pcm.
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