Have this unusual sound coming from under the hood. My daughter's Accord does the same thing (close to 300,+++ mls not exactly sure. Odometer broke at 199,999 @2yrs ago; man you cant beat a Honda), but never knew what it was; now the TL-S is doing it also. I now have 80,+++ on the car.
When I start the car and begin to back out of the drive it makes this humming noise like something is self adjusting. I know there is a self-adjusting timing belt tensioner; could that be it?
James

 

its the abs sensor self testing itself. it does it twice, and its normal

if its only doing it now i dont know what happened be4 lol. it should always be doing that when comming from park

 

Thanks,
Guess I just had the radio up to loud before and once I heard it started listening for it every time