engine light

hi everyone, my E90 showing yellow half engine light on the dashboard display. started 2 days ago. oil change was overdue but did not goes away after my 1st DIY oil change yesterday. checked the manual, it says engine wont achieve full power or something like that. frankly, doesn't seem to...

I have recently got the car serviced and a couple of sensors replaced. I have since got the engine light, and hoping its nothing too much. I was wondering if anybody with a diagnostic reader would be generous enough to let me hook my e46 coupe up to it. Of course I can travel. Also I have...