FixVault

DTC U2100:00 [Advanced Keyless Entry And Push Button Start System]: Notes

WARNING: This page is about a different car, the 2010 Mazda 3. However, it is still accessible from the selected car via links, so may be relevant.
DTC U2100:00 (ADVANCED KEYLESS ENTRY AND PUSH BUTTON START SYSTEM) DETECTION CONDITION AND POSSIBLE CAUSE

DESCRIPTION Incomplete configuration
DETECTION CONDITION 
  • Configuration was not completed.
POSSIBLE CAUSE 
  • Keyless control module configuration error
  • Keyless control module malfunction