HI.. i just found out where is the sound coming out from.. got the stetoscope out and got the mechanic to have a listen , and guess what? the sound is from the heat grill that is seating on top of the engine. according to the mechanic it's loose or something.. and just need a little of tightening , that's all.. no big issue.. i couldn't let him do it at that time cause the engine was still hot..
so no big issue guys.. and no the SES light has not come on or off at all... no problems with the engine..