Engine

Hello there, here is my story: My power steering hose came off (broken clamp/cold temperature) my buddy fixed it. I drove it home and the engine light came on. I shut it off, then it wouldn't start. When I looked under the hood I found that a hose going into the coolant bottle was off. I put it back on. The car started. Drove it around the block and the engine light went off. When I parked the car and turned it off there was a strong smell of coolant.
My Question is: with that hose being off. Did it mess up engine function. Or once the hose went back on it regulated it self?
Is the coolant smell a warning of something?


Thanks for your time,
Joanna