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Thread: Can't read new ecm that has been unlocked by HP tuners? Failed to start?

  1. #1
    Advanced Tuner
    Join Date
    Jun 2018
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    Can't read new ecm that has been unlocked by HP tuners? Failed to start?

    I have a 2018 Charger we are doing a 392 swap on. Had a 5.7. Sent the ecm out to HP to get unlocked and I can not read the new ecm. Everytime we link up it just says Failed to start.

    Any ideas?

  2. #2
    Senior Tuner SultanHassanMasTuning's Avatar
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    Nov 2009
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    did you connect the smart key?
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  3. #3
    Potential Tuner
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    Aug 2020
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    2018+ Vehicle need the HP Tuners Smart Access Cable installed to do any reading/writing.

  4. #4
    Advanced Tuner
    Join Date
    Jun 2018
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    603
    Lame, just tossed one in. Is it something we leave in the customers car or just install and remove it every time. Seems like a huge pita to do that every tune job