Verified answer

So if the same code came back i would first check all the fuses . If the fuses are good start checking for bad connections , any corrosion can cause this code . Another thing that sets this code is the O2 does not start switching soon enough . If you have access to a scanner that gives you a data stream that would help alot . You can check for power and ground at the O2 i believe it is one white wire and one black wire ,