1999 mustang gt 4.6 v8 anti theft has shut everything down and i dont know what to do.please help

[Reeder]

I have a 1999 mustang gt v8 4.6 anniversary addition..anti theft has shut everything down and i have tried everything the dealership wont take anything over 10 years old and its costing me a lot of money and no success if i get another pcm put in will it fix the issue or will they have to reflash the car as well..please help

 

[RaggedGT]

Heck around your area for a mobile locksmith-or maybe even a “Tuner” shop. The mobile locksmith should be able to address the security issue-reprogram keys etc- a “Tuner” might be able to erase the security