code p1415 and code p0171

Question

Service engine soon light, how to fix.

Answer 1

P1415 MASS air flow too low
P0171 Fuel trim lean Bank 1
Do inspection first from the MAF flow air duct to its throttle body. if there are any vacuum leaks from any its induction hose or crankcase hose this will set a P0171 as well as a P1415. something  not connected or crankcase hose is leaking allowing false air to interrupt the MAF range

Comments

Thank you Reynaldo.  
I was reading a lot about code p0171 and finally replaced oxygen sensor bank 1  before catalytic. Engine start working more stability + increase power and gas mileage, but I have little different errors code: p1415 and p0102. Again reading a lot about this problem and confused, don't have enough experience. What do you thinking about....
My car is 2006 BMW 525I

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If you set a P0102 , the transmission will not shift right, there is no other fix but to replace the MAF sensor