What can be the best way to fix CEL?

I have a honda civic 2005 automatic. I'm trying to fix it to pass the smog test but the CEL comes on. I took it to Autozone to see what code it is. It turned out to be P0741. I looked it up and it has to do with torque converter. Now, a friend offered to take my car to his mechanic and the guy said it has to replace 3 sensors. I don't know what to believe. The car works perfectly fine.

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