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Home >> Subaru >> 2017 >> Forester 2.0XT Touring >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 17 (Engine Control System (Diagnostics) (P0171 To P0685) (H4DO)) >> Diagnostic Procedure with Diagnostic Trouble Code (DTC) >> DTC P050A Cold Start Idle Control System Performance >> Outline Of Diagnosis

Outline Of Diagnosis

WARNING: This page is about a different variant/trim than selected.

WHEN COLD, THE ABNORMALITY IN THE CONTROL OF TARGET ENGINE SPEED INCREASE IS DETECTED. (P050A) 

Judge as NG when actual engine speed is not close to target engine speed at cold start.

DETECT MALFUNCTIONS OF THE CATALYST ADVANCED IDLING RETARD ANGLE CONTROL. (P050B) 

Judge as NG when ECM is not controlling the angle properly during catalyst advanced idling retard angle control.

Judge as NG when actual retard amount is under the specified value at cold start.