Fiance started her Golf today. Rough idle and FLASHING check engine light. Strong burning smells, like burning oil.
Checked the oil - about a half quart low, filled it. Left it for three hours.
Came back, started it again. Same thing - rough idle, flashing engine light, strong burning smell.
Oil was fine.
Out of curiosity (and so I could get closer to the smell), I started it a 3rd time. Idle was fine, engine light on steady but not flashing, no more smell.
Any ideas? It has been raining a lot recently and is humid in the garage. Car has been taken in for failed O2 sensor before which caused a false engine light.
Thanks for any thoughts!