Hi I have had trouble starting my car the past few days, when I plug up a code reader I get P0339 for the crankshaft position sensor A circuit.

My car is a 2012 Honda Civic EX 2 door. 126k miles. The problems seems completely random as it dose not matter if its hot or cold, been sitting for a few hours or a few minuets and has gone days without the problem only for it to do it again. When it first started I would turn the key and hear it try and crank only instead of instantly starting it took it around 7 or 8 seconds for me to here the engine start to fire. On a side note when it happened the first couple times my check engine light, power steering and VSA warning lights would come on but still be working ( at least the power steering was). One time I had no power steering and had to restart the car to get it to work. I read the code means its a sensor problem but with everything else im worried its something im missing. Iv also already checked the battery and alternator both seem to be working normally.