ECM problems after replacing both oxigen sensors why?I had a check engine

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Toyota Corolla 2006. I had a check engine light go off, this what I did. 1- checked with 2 different scanners. 2-Replaced oxigen sensor. 3- Check engine light went away...for 3 weeks. 4- Cleaned the other sensor with brake cleaner and dry it with air. 5- Check engine went away...for 2 weeks. 6- scanned with 2 sensors, the PO171 came back plus another one #P0741. These codes came from a scanner my son bought for $20 online. 7- Took it to Autozone again and the PO171 showed again PLUS I will write exactly what its in a printout the gave me : ASE certified Master technician have seen this issue on your type of vehicle and the most likely solution is : Replace ECM. ( No code for this) 8- I did some research and found out that Toyota had a recall for ECM's made for my kind of car. 9- Called Toyota gave them the VIN # and they said the ECM was already replaced on my car. My car runs good, it won't fail to start or respond strangely or randomly shut off while driving. It has 195,000 miles

How long has your 2006 Toyota Corolla had this problem?

2 months