bmw 750il 1998 po1270,po170,po173
 

I got this car like two weeks ago,runs good a lot power but check engine on ,no let me make emission,i reset couple times ,but is come back,any ideas what is located this problem,.
thanks guys.:tsk:

These are mixture errors. P1270 is a MAF error, 170 is bank 1 lean, 173 is bank 2 lean. How many miles?

Thanks,has 185 k ,po173 is do it now we check maff by the computer,and driver side has 0.5 kg/H and left side has 7kg/H , wire or dme computer is bad ,i check the wires and are good,no sure how check the computer is post to be a minimun 6kg/H,no sure how check the computer,thanks again.