today i was climbing a steep long ascent,i found the car was very slowly and seems did not have enough power like usual.after that,a green light on the left bottom of the panel was on,i guess it says OD/OD(?),and i can smell something inside the car.i pulled over and shut down the engine.i checked around,but nothing strange.then after a while,i started the engine,and everything looks OK,the light was off.i just bought this car 3 weeks ago,its mileage is 155400km.i am in vancouver,canada.i was wondering if it is a possbile problem of my car?please help.thanks a lot.