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Home >> Mazda >> 2007 >> CX-9 Touring, 3.5 C, AWD >> Repair and Diagnosis >> Engine Performance >> System >> On-Board Diagnostic [Engine Control System MZI-3.5) >> DTC P0505 >> Notes
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DTC P0505: Notes

DTC P0505 (MZI-3.5) DETECTION CONDITION AND POSSIBLE CAUSES

DTC P0505 Idle speed control system problem
DETECTION CONDITION 
  • The PCM attempts to control engine speed during the KOER self-test. The test fails when the desired engine speed could not be reached or controlled during the self-test.
POSSIBLE CAUSE 
  • Failure mode effects management condition is present
  • Intake air restriction
  • Exhaust restriction
  • Sludged throttle body
  • Vacuum leakage
  • Throttle body malfunction
  • PCM malfunction
NOTE:
  • This DTC is informational only and it may be accompanied by other DTCs. Diagnose other DTCs first. If other DTCs are not present inspect the intake air system for air restrictions, vacuum leaks, and damage. If no concerns are present, clear the DTC and repeat the self-test.