Possible causes
– New PCM-Needs progranming
– Incorrect VID configuration
– Incorrect VID configuration
Tech description
After a new PCM has been installed, the Vehicle Identification (VID) block has to be program to the PCM.
There is a service bulletin for the P1639 code for the following models:
1999-2002 Lincoln Town Car
1999-2001 Lincoln Navigator
2002 Lincoln Blackwood
Lincoln Factory Service Bulletin OBDII Code P1639
Symptoms
– Engine Light ON (or Service Engine Soon Warning Light)
P1639 LINCOLN OBD Code Description