AOS Related?

[funkdefino]

Symptoms:

• Codes P0507, P1128, P1130
• Light misting of oil around AOS area
• Slightly erratic idle

Things I've done so far:

• Cleaned throttle body
• Cleaned MAF
• Replaced and resealed oil filler tube
• Cleared codes

I'm still getting all the same codes but the car drives much better now. Not seeing any more oil mist in the engine compartment either. So, my question is this...

Is it possible this is the AOS even though I don't have any smoke ever coming from the tailpipe? I also can find no oil residue in any pipes where it shouldn't be.

Anything else I can check for? A vacuum leak? Is there a systematic procedure? I've searched the forums and read all I can... Need some direct help. Thanks!

I had the lower pan seal done at Porsche Orlando 3 months ago. It appears that it needs to be redone. Can this possibly be the source of my vacuum leak?

2000 Boxster S
80,000 miles
Well maintained. No major issues.