code 171 and 174 need help i just replaced tranny and now this

[antwade1]

i keep getting an error code of 171 and 174 thanks to my code reader and i reset and it comes back with engine light

i know the gas is good and i know that the gas cap is tight what could this be k and n fiter?

my x5 feels like it does not have enough airflow coming into the engine it bumps like a wagon is being pulled behind it

when i start off in 1st gear it feels like it does not want to go
once i get on hwy it is fine

what should i do please send me help

also thanks to all of you x5 owners with 116k on the engine you have saved me some money

please save me more

[mrbmwx5]

check the intake boost may be lose or the connector at the AIR MASS.

[vinuneuro]

What faults do the codes 171 and 174 indicate?