What to do about check engine soon light on 2004 BMW 325i

Codes PO174 and PO171 show up from diagnostic reading

by in Kansas City, MO on October 24, 2012
2 answers
ANSWER by on October 24, 2012
have a smoke test done to determine vac leak to start with. it could be the mass air flow sensor
ANSWER by on February 11, 2013
This is a lin fuel code problems. Check the rubber boot in the intake after the mass air flow sensor'MAF' for cracks, all vaccum hoses allso. Perform a Smoke TEST to be sure there in no Vaccum leaks in the system. There is a hose that connect from the dipstick to the Oil separatoe valve that hot oil will destroid it.
Related Items:
I have a big problem in my bmw 325 2002 model..every week im adding 1kg of oil to the engine..there is no leakage from the engine..no oil on the ground.but when input my car on N nd pull on the thr...