DTC P1C17: Idle Control System Rpm Higher Than Expected (HPCM): Trouble Symptom
WARNING: This page is about a different car, the 2015 Subaru XV Crosstrek. However, it is still accessible from the selected car via links, so may be relevant.
Normal control.
NOTE:
For the diagnostic procedure, refer to DTC P0507 IDLE AIR CONTROL SYSTEM RPM HIGHER THAN EXPECTED. < Ref. to
DTC P0507 IDLE AIR CONTROL SYSTEM RPM HIGHER THAN EXPECTED , Diagnostic Procedure with Diagnostic Trouble Code (DTC).>