FixVault

DTC P0505: Notes

DTC P0505 DETECTION CONDITION AND POSSIBLE CAUSES

DTC P0505 Idle control system malfunction
DETECTION CONDITION 
  • PCM cannot control idle speed toward target idle speed while KOER self test.
POSSIBLE CAUSE 
  • Electronic throttle control system malfunction
  • Clogged air cleaner element
  • Clogged air intake passage
  • A/C relay control circuit malfunction
  • Generator control circuit malfunction
  • Low engine compression (Over capacity of blow-by gas)
  • PCM malfunction