my car is throwing a code 4.. which is the crank position sensor? what actually does the sensor do? becuase of right now my car does not want to rev up past 4 grand... and its real sluggish... its also throwibg a code 10 IAT which is the intake air temp. and a code 41 which is primary oxygen sensor

 

if im not mistaken it tracks rpms but im not sure

 

could anybody please help me out.. its my daily and with out that i dont have anything to drive.. please anybody