ford escape 2011

Question

codes p1260 p1602 and p1397 how do I reset?

Answer 1

P1260 Theft detected Vehicle immobilized

P1602 Immobilizer / ECM communication error

P1397 System voltage out of self test range

Is the correct key being used ? Battery is use  has to maintain proper voltage, With  codes P1602 and a P1397 you set this when the battery is too low