I got a notification back from an engineer of the VCX Nano I used basically saying that their product can't reprogram used ECUs, are they trying to pull my leg to avoid a return or is there some truth to it? Their reply to my request:
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engineer asked, you re-program second-hand ecu ?
plz watch our programming video, it is online programming, not re-programming .
https://www.youtube.com/watch?v=q9bnFPgQET8&t=
If your car is second-hand ecu and you want to do re - program, it is normal that fail to do it.