ECU Code 17 - Vehicle Speed Sensor; steering wheel vibration?

okay so my 1990 integra with a b18a1 from a 1993 starts up, warms up, and idles smooth as butter, with no vibration in the steering wheel at all… and after about 5-10 minutes, wether i leave the car running for a while, or if i start driving it somewhere, the CEL comes on and a noticeable (but not violent) vibration occurs in the steering wheel, wether the car is idling or going 70mph down the highway, and everything in between. my ECU is reading code 17 - Vehicle Speed Sensor.

what does that have to do with my steering wheel vibrating, and how could i go about trying to fix this problem? thanks guys.