I own a 98 explorer and the code reader I bought gave me a PO153 code and according to the book that came with it is 02 circuit slow response (Bank 2 Sensor 1) now I need to know how to fix the problem. What exactly am I looking for ? Any information would be helpful. Thank you.

 

I kept getting that code and one for sensing too lean. I replaced both HO2S sensors ($50 each) and have not seen any codes for over 8 months.