Kia Troubleshooting Questions? Ask a Mechanic
Welcome, I'm Chris (aka Moose) I prefer to work when others don't, I am here around lunch and after dinner till after midnight.working after noon till just after midnight.
For the oil light I would immediately start with a manual oil pressure test. You do not want to run the engine if the pressure is low. This will tell us if its just a sensor going out. ON the 3.8 liter the pressure spec is 18.77 psi at 1000 rpms.
Here is your headlight diagram. https://dl.dropboxusercontent.com/u/90220402/klights.pdf
Do you have a volt/ohm meter to check the headlight dimmer switch and a scan tool to check the IPM and FAM modules?
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Okay I will opt out and see if another can explain how to diagnose these issues better than I. Best of Luck.