DTC P0505: Idle Speed Control System Problem: Notes

DTC P0505 CHART (MZI-3.7)

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	Intake air restriction Vacuum leakage Throttle body malfunction Sludged throttle body Mechanical concern with engine (Insufficient compression) Exhaust restriction Failure mode effects management condition is present 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.

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

Intake air restriction
Vacuum leakage
Throttle body malfunction
Sludged throttle body
Mechanical concern with engine (Insufficient compression)
Exhaust restriction
Failure mode effects management condition is present
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.