B1681 - 2001 Windstar 3.8 after engine being changed

Question

Engine will not crank with key and no injector pulse it is possible to crank engine with

a extrenal starter button and comes up with B1681 code and incomplete KOEO test

Answer 1

Hi there,

This code indicates an issue with the passive anti-theft system. Here is some info for you.

B1681 FORD - PATS Transceiver Module Signal Is Not Received

Read more: https://www.autocodes.com/b1681_ford.html