Looks like I'm running into this issue. I had a half engine light come on while accelerating on the freeway the other day.
I tested the vacuum as described after turning the car off, and no vacuum.
50k miles, just out of warranty since it's an '07.
Is this a pretty easy replacement? If not, I really need look around for a mechanic in the LA area. I also have warm start issues (A0B4)... and I also want to get an upgraded FMIC.