ERR O 17. 520204

A few months ago I got this Error Msg. You sent me the TPS Reset instructions & it worked GR8!
This occurred again last week, I tried the Reset, worked for about 5min.then ERR Msg again. Rough idle but cruising is not a problem.
New Batt. Installed. Any ideas? Thinking about disconnecting Batt. And reprograming any presets. TIA

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