P1516 Buick lacrosse 2007 3.8 - what part do I replace to fix this problem ?

Question

P1516 I cant find this part to fix it !

Answer 1

P1516 Throttle actuator control (TAC) module throttle actuator position performance

This is a condition where the throttle actuator detects that the commands and the actual throtttle position are not within a calibrated range of each other.This can be a intermittent problem or this can be the throttle body assembly as a solution