One problem related to battery has been reported for the 2006 Lincoln Navigator. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2006 Lincoln Navigator based on all problems reported for the 2006 Navigator.
During normal driving conditions, the car gave in rapid succession a number of warnings and the car began to run rough and shift erratically. One related to the stability control system and the other was a "etc engine failsafe mode". After restarting the car the stability control error persisted. The dealer replaced sensor assembly 6l2z*3c187 for ~ $1000 for the part and labor + the battery and indicated no other codes were stored relating to the fail safe warning. The fail safe warning returned a few weeks later and the dealer was unable to replicate or capture any codes over a 2 day period.