Help! Problem code PO147 02 sensor heater circuit malfunction

[97_3.8_Firebird]

Newby to this forum - searched for an already posted question/answer but none matched up to my exact code/problem. I have a stock 97 3.8 firebird and it was running fine untill I went to Iraq. When I got back it started shuttering like your low on gas or have something blocking the injectors. I took it to Advance Auto Parts and got a free code read. It came out as PO147 02 sensor heater circuit malfunction (Bank 1 Sensor Three) it also had an older code of PO300 Random/multiple cylinder misfire detected. I attribited the cylinder code to a not completely seated sparkplug wire that I fixed when I found it. Would the possibly missing cylinder cause the other 02 issue. I ordered two new 02 sensors before and after the cat but have not recievced them yet. Thoughts, inputs appreciated on the 02 code definition.

CD

[97_3.8_Firebird]

Re: Help! Problem code PO147 02 sensor heater circuit malfunction

Well... 150.00 down and two new O2 sensors and still the same problem, looks like on to sensor number three under the exaust manifold which I'm not looking forward to. Any inputs on the PO147 sensor heater circuit, maybe I'm working on the wrong sensor?:rant: :rant: