This is 2009 Accord with 75K on it. I have this noise for some time. It is more significant when I am driving on the ramp. It is like some constant low frequency knocking sound from right front under the hood. When driving straight at low speed, I heard that sound as well, sounds like from engine. I know Accord is making all kinds of noise, so before I take it in, I like to see if anyone has some thoughts on it. Thanks.