Bad sensor, pretty straight forward, unplug-->unscrew (or rip off if corroded as I did in my case)-->replace with new and add anti seize.My CEL came on in my 98 Forester, P0141, O2 sensor Heater Circuit Malfunction, Bank 1 Sensor 2.....Easy fix? Can I do it myself? Anything I need to know about before I start?
Brian