Having left my skoda at work since we had heavy snow fall about 10 days ago i went to start it and no supprise the battery was flat.Got it jumped and let it warm through for 30 mins.

On driving home first of all the boost gauge just stayed at 0psi then as it warmed up it started to work again so i take it the DV must have been frozen (been -13/-8 all day) Now it wont boost passed 5 psi.No management light so i plugged it in after i drove it home.The codes p0238,p0106 and p0562 came up.Now the map sensor which it looks like being was replaced a few months back.Its also popping and banging more than usual.Any ideas what to check first guys?

The Met Office site?