FixVault

DTC Detection Logic

DTC No. Trouble diagnosis name
(Trouble diagnosis content)
DTC detecting condition Possible cause
P1805 BRAKE SW/CIRCUIT
(Brake switch)
A brake switch signal is not sent to ECM for extremely long time while the vehicle is being driven.
  • Harness or connectors

    (Stop lamp switch circuit is open or shorted.)

  • Stop lamp switch