i recently changed my water pump in a 03 e320. everything seems to be working fine, i.e leaking, temp etc but a day later my check engine light came on. i had it checked and it came up with code p0106. map sensor, bam sensor, etc. also said to check vacuum hoses, timing possibly. i dont know anymore. i did find one hose coming off of the radiator loose so i tigthened it and had the code reset, it went away fora bout a day and has come back. please help me in a hurry.