The way I see it, engine does not "run fine" if it is in limp mode. I might say it sounds fine at idle, but if it is in 'limp mode; then it does not get proper RPM at W.O.T.
Some day Raytech will find his round tuit, and add his e-mail to his profile so that when we click on his name we might see an e-mail address...
if the code is "active", if you do clear it, it will come right back next key-cycle, this often makes it look like it was not cleared.
E27 being the crankshaft sensor malfunction, you may have a torn wire on the crankshaft sensor circuit. The crankshaft sensor and the camshaft sensor wires are the 2 sets of wires that go closest to the fan, and as such, may get torn when the fan vacuums up a plastic bag off the floor. We also see this circuit get crazy in trucks where they have 5000+ hours and have never changed out the coil packs and spark plugs, my assumption has been that because those wires run right along side the coil packs, a 'stray' spark looking for a path back to B- found it's way into the harness for the crank or cam sensor I have also seen corrosion in the connection to the ECM cause this code.