Help!! Any help appreciated 97 4.6 supercharged

[ERS SuperStang]

Anyone know why my car won’t start an is flashing “Theft” after my battery went down an wont read my X4 SCT TUNER. appreciate any help I can get.

 

[wmburns]

Yes. After you have visually checked out all of the fuses, Check out:

1996+ Crank with no start check list
https://www.allfordmustangs.com/forums/4-6l-tech/336452-1997-mustang-wont-ignite.html#2984838

Pay close attention to the part about the PCM/CCRM ground wire that goes around the battery to the radiator core support.

 

[AutodesignJohn]

It's the PATS system. It's not reading the key correctly. Could be some error, try using forscan or a similar program to check what the PATS is reading.