I got a 1992 Accord sedan with a 2.2L I4 engine with 239154km and it appears to have some issues. They are:
- check engine light on 2 seconds after shifting to D4 (was told this was most likely O2 sensor)
- parking brake goes up and down, but sometimes it just doesn't want to work
- problems of sleepiness after driving with the heat cranked up but windows closed
I think the second problem is due to winter, but then again I see someone shoved in a cheap prepaid long distance phone card in the "chamber". So could that be it?
Third problem I suspect the car is leaking carbon monoxide or something else because everytime I drive with the windows closed and the heater is on to maximum with rear defrost, I get really tired and sleepy few hours after coming home. Also, I was told to check for little white puffs of smoke right after starting the car and I do see them come out from between the PGMFI device is and the black Honda cover on the 2.2 litre. I know I sound like a total newbie, but this is my first car so I don't know all those proper car terms yet.

Okay, so I want to fix this. How much would this run me in terms of money? Should I have this work done at a Honda dealer (if they service cars that old?), a specialized Honda garage, any garage or a chain like Canadian Tire?