crankshaft relearn

Good afternoon, ill try and give as much detail as i can on this and TIA for any advice! A little info about the car - 2018 42k miles owned since 9k. No prior mods were done to the car except PPF Stock tune Stock motor Roush CIA without tune (installed 2+ years ago) 2 12" subs connected to one...

Replaced the clutch about 6months ago, never did a crank relearn and now I'm getting a P0339 code, Faulty signal from the crankshaft sensor 'A'. It takes a bit for it to start and it's usually in limp mode when it finally does. My question is, should I replace the crankshaft position sensor or...