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Discussion Starter · #1 ·
I have a 2009 Mustang GT and I've seen videos where '10/'11 can enter engineering test mode and 99-05 can. It would seem strange for them to just skip a generation. When I try the same steps for a '10 I get a bunch of manufacturer readouts and it has the gauge test option but even the gauge test does nothing. I'm looking to get the digital tac and speedometer to come up.
 
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