Home >> Subaru >> 2021 >> Outback Base >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System (2.5L) (Diagnostics) (1 Of 4) >> Diagnostic Procedure With Diagnostic Trouble Code (DTC) >> DTC P0021: "A" Camshaft Position - Timing Over-Advanced Or System Performance Bank 2 >> General Description >> Outline Of Diagnosis