Thanks for the info. I guess the best way to do this is when it's winter time I'll bring the car to local dealer and had them give me a full diagnosis. If it's indeed intermediate lever, and if it doesn't hurt the engine(as I understand, when it's too cold the valve will kinda stuck, and the lever that's pulling the valve will not fully open the valve. this caused misfiring and roughness in starting, as well as the SES light), I'll just have to ignore this from now on. If it's something that progresses and cause more damage, I'll either repair the car or sell it/trade it in when it's not too cold.