To start, my malibu always seems to have problems, no surprise, i find that a lot of malibus' through the generations do too. So that makes mine no different, but has anyone else run into a few of these similar problems. 1. The Engine Bay makes an exceptionally louder than normal droning? 2. Recently changed oil and still getting the "add engine oil" prompt? 3. It runs really hot, and maybe the coolant sensor is broke? I appreciate any help i can get, considering i do all of my own repairs and general maintenance.