what is the cost to replace knock sensor on 2008 Kia Sedona

van has no pick up and go - hesiates when given gas - rpms go up but van still hesiates on accelation

Asked by for the 2008 Kia Sedona
why the knock sensor?? lots of stuff can cause this. fuel pressure, filter clogged, cat clogged, trans problem and the list goes on. stop guessing and get a diag with a bid.