so i have a 2001 volvo s40 im new to forums and i am having several issues with my car

its throwing several codes (p0303,p0304,p0171,p0505,p0507,p0335,p0036,p0237,p 0107,p0102)

car takes two turns of the key to start

once it starts up it idles high at around 1,100 for a few seconds then levels off

runs fine until it gets up to temperature and when the ac is turned on>

i have replaced the iac, replaced the vacuum hoses, replaced the spark plugs, the map sensor, fuel filter, checked that the vacuum was working correctly, cleaned the pvc valve thoroughly, changed the oil, oil filter, cleaned the MAF

should i buy a new MAF or could it be something else
and the check engine light is always on i hear its a common thing on the s40


PLEASE HEEEEEEELLPPPPPPPPPPPPPP!!!!