Just wanted to let everyone know that dealer told me that it is related to oxygen sensor. I will get my Rdx tomorrow and I will post the error code. I am surprised to find out that the oxygen sensor need to be replaced @ 3000 miles.

 

running leaded fuel?

 

Ok, the code was Po158 and oxygen sender replaced. I used premium gas all the time.
Even the Acura dealer is also surprised to see this code at 3000 miles. Now it is working fine.