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Home >> Infiniti >> 2013 >> M56 Sport >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System - DTCS P1087 To P2542 >> DTC P1805: Brake Switch >> DTC Logic >> DTC Detection Logic
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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
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