If your car is running well and no CEL with codes just drive the car to see if they re-appear. The DME is just a computer and like any computer it may go bezerk if water temporarily shorted your O2 sensor wires, but as it dries out it may be fine. Your unplug and reset may be all that was needed. You had several "short to ground" codes so water is a likely source of the problem.
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2009 Cayman 2.9L PDK (with a few tweaks)
PCA-GPX Chief Driving Instructor-Ret.
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