Ok I retrieved two codes from my 96 GSR

22- VTEC Oil Pressure switch defective or unplugged

54- CKF (Crankshaft Speed Fluctuation) Sensor defective or unplugged

SO what are these and how do I remedy these? Is the car OK to drive? I noticed one is an oil pressure switch, I hope I havent damaged the car by driving it with the codes going.

Please help guys, Im about to go out on deployment and id like the car to be right so that my mom can drive it to work and such while Im gone and I dont want it to give her any trouble. Thanks guys!