Recently, my check engine light came on and I took it to Autozone where they will get the OBD2 code for you for FREE. The code is P0161-HO2S Heater Circuit Malfunction, Bank 2 Sensor 2.
I haven't been able to find any more about this malfunction on the internet and would like to know how expensive it is to fix or if it is something I can do myself, been somewhat knowledgeable about car repair?