Holy Fire batman....dont crank it anymore without the spark plug in there if its spraying gas.
Trust me...if it hits one thing that is being eletrically charged, viola engine fire...
My guess is this, you said you had a code before but it was a O2 code one that you never fixed. Problem is...the next code in line doesnt flash the light or add a new one so you probably have had the crankshaft code for a while.
Replace it, its very easy. Go ahead and clean the plugs up or replace them. Hopefully thats all it is.
Oh and when you are done, drive it back to the stealership look and ask for the same guy you dealt with. Tell him you got the car going.....at a fraction of the costs. Then ask to speak to the manager, give him the sheat that they gave you and ask for a full refund since their diagnosis was 100% off. $3300. LOL!