DTC P0131: Front Ho2S Circuit Range/Performance Problem (Low Input) - IMPREZA 2.2L, Legacy & Outback 2.5L M/T & Outback Sport

Perform basic diagnostic procedure. See BASIC DIAGNOSTIC PROCEDURE . If only DTC P0131 exists, perform DTC P0132. See DTC P0132: FRONT HO2S CIRCUIT RANGE/PERFORMANCE PROBLEM (HIGH INPUT) - IMPREZA 2.2L, LEGACY & OUTBACK 2.5L M/T & OUTBACK SPORT . Clear memory and perform verification procedure. See CLEARING DIAGNOSTIC TROUBLE CODES  and VERIFICATION PROCEDURE  .