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DTC Detection Logic

WARNING: This page is about a different car, the 2011 Nissan Leaf. However, it is still accessible from the selected car via links, so may be relevant.
DTC DETECTING CONDITION AND POSSIBLE CAUSES

DTC Trouble diagnosis name (Trouble diagnosis content) DTC detecting condition Possible cause
P1805 BRAKE SWITCH (Brake switch) Stop lamp signal is not sent to VCM for extremely long time while the vehicle is driving.
  • Harness or connectors (Stop lamp switch circuit is open or shorted.)
  • Stop lamp switch