FixVault

Home › Mitsubishi › 2000 › Eclipse RS, Automatic › Repair and Diagnosis › Engine Performance › System › Engine Controls - Self-Diagnostics › Diagnostic Tests › DTC P0505: Idle Control System Malfunction › Probable Causes

Probable Causes

Idle Air Control (IAC) motor failed.
Open or short in IAC motor circuit, or loose connector.
Engine Control Module/Powertrain Control Module (ECM/PCM) failed.