LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Mazda >> 2007 >> 6 Mazdaspeed >> Repair and Diagnosis >> Engine Performance >> System >> On-Board Diagnostic [Engine Control System L3 With TC] >> DTC P0505 >> Notes
April 5, 2026: LEMON Manuals is launched! Read the announcement.

DTC P0505: Notes

DTC P0505 DETECTION CONDITION AND POSSIBLE CAUSES

DTC P0505 IAC system problem
DETECTION CONDITION 
  • The PCM cannot control idle speed toward the target idle speed during the KOER self test.
POSSIBLE CAUSE 
  • Air cleaner element clogged
  • Air intake passage clogged
  • A/C relay control circuit malfunction
  • Generator control circuit malfunction
  • Low engine compression (Over capacity of blow-by gas)
  • Electronic throttle control system improper operation
  • PCM malfunction