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Its possible your car has had a locked Ecutek or BrzEdit tune written to the ecu.
Instead of trying to read ecu see if the oft ECU INFO , or the diagnosstic logging functions work ie go to diagnostics then look at the engine parameters.
If the ecu info can be read like the calibration id and you can log or see engine info on screen like rpm throttle afr etc then its most likey a locked tune in ecu and oft is fine.
of you cannpt even read ecu info or engine logging or diagnostics then its likey the obd port is bad or cable to oft is bad.
one more thing you can try is disconnect battery then press brake pedal, then reconnect battery.
This will reset ecu and may sort problem out.
If you have a locked tune , most likey ecutek, you going to have to find or go to someone who has ecutek cavle or an ecutek tuner. then will be able to unlock ecu for you by writing back a stock tune, good news would be you have a $350 ecutek licience in ecu.
of so it may be better to sell oft and get ecutek tune, but thats up to you.
if its brzedit ie not even the ecutek guy can read then you going to need to fine a brzedit guy.
or alternativly buy a secondhand ecu and swap it in
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