DTC P050A Cold Start Idle Air Control System Performance: Trouble Symptom

WARNING: This page is about a different car, the 2013 Subaru Forester. However, it is still accessible from the selected car via links, so may be relevant.

Engine keeps running at higher speed than specified idle speed.
Engine keeps running at a lower speed than the specified idle speed.
Engine stalls.

CAUTION: After servicing or replacing faulty parts, perform Clear Memory Mode < Refer to OPERATION , Clear Memory Mode. >, and Inspection Mode < Refer to PROCEDURE , Inspection Mode. >.