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Home › Mitsubishi › 2000 › Diamante LS › 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 motor failed.
Open or short in idle air control motor circuit, or loose connector.
Powertrain Control Module (PCM) failed.