I have a 2000 honda accord ex and my check engine light is on. I haven't changed my oil, and when i start my car the needle is pointing at the 1 on my tachometer. i think the needle suppose to be one zero when i start my car. I don't know whats wrong. whats wrong? also how do i replace the light bulb on the rear of my car? a friend closed the back of trunk really hard and my brake lamp light is on. how do i replace my brake lamp?