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On Board Diagnosis Logic: Notes

WARNING: This page is about a different car, the 2008 Nissan Maxima. However, it is still accessible from the selected car via links, so may be relevant.

The MIL will not light up for this diagnosis  .

ON BOARD DIAGNOSIS LOGIC

DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P1805
1805
Brake switch A brake switch signal is not sent to ECM for extremely long time while the vehicle is driving.
  • Harness or connectors

    (Stop lamp switch circuit is open or shorted.)

  • Stop lamp switch