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Discussion Starter #1
I tuned my 2017 mustang with SCT X4, and when I took my car to the dealer and program a key fob, they said the ECU is locked, and they can't get access. What should I do? Does anyone have the same problem?
 

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Return the car to stock with your tuner although the dealer should have been able to make a spare key regardless.
 

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Discussion Starter #3
I did return the car to stock by programing, however, the dealer still couldn't get access, which is so weird.
 

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Find another dealer. They should’ve been able to diagnose and correct the issue. Or at least diagnose and offer a paid solution.
 
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