That's a heated O2 sensor code. I see with Fords it can be set by MAF and injector issues, and others. Good place to use what you want to use. OTOH, it might just be the sensor. I didn't look into that to calculate the odds. Problem is these sensors can be pricey so you don't want to throw parts at it. Sounds like you're doing the right thing. Getting some new gear too. Watch your prices on sensors if you need one. Last year my daughter's Mitsu threw codes for all 4 O2 sensors. It was a pain figuring out the "bank" and fore and aft because there were about 5 different codes. But I determined that all 4 were tossing a code. Then I just had to make sure the cat wasn't bad, and would destroy 4 new sensors after I put them in. That's why I now own a remote temp reader! Anyway my son picked up the sensors at our local Murrays. You want OEM usually. Murrays usually prices competitively and I don't do much price checking. But since 2 of the sensors were a bill each I went online. Took them back to Murrays unopened. Think I saved about $130 by getting them on Amazon.
--Vic