My CEL comes on with a P0170 code. I clear it and it comes back a couple of days later (after 200-300 miles), so I'm ready to replace the Air Mass Meter soon.

Each time the light comes on, I get a strong odor of burning oil that lasts for a minute or two, then it goes away and there's no trace of an oil leak or anything of the sort. What's going on? Thanks,
Don