Hello everyone, new here and relatively new to Jeeps. I have a 2006 Wrangler X that for now is still stock. On Saturday I got code p0153 for o2 sensor 2/1 and replaced it. Disconnected battery to clear the code. Drove the next day and CEL came back with p0157 for 2/2. A little while later the CEL went out but back back a day later with p0153 (again) and p0157. . One other thing is that my gas mileage was crap but after replacing 2/1 it is back to normal. Right now it is running fine. I did use a NKT brand sensor and am thinking that replacing sensor 2/2 will resolve it. ANy ideas?