PONTIAC GRAND PRIX COMPUTER READ CODE

I Want To Know If My Map Sensor Is Nfg Or My Maf Is Nfg Or Mt Throttle Tps Body Needs To Be Changes

99 Pontiac Grand Prix 3.1l My Car Read Code: Po401 (egr Flow Insufficient) What Does That Mean? How To Fix It? What Should I Do...

Can You Tell Me What Things To Check With A Scanner Code 420 Catalyst Effecency Below Threshold Bank 1

I Bought An Actron Pocket Scanner And Hooked It Up But Got No Power To The Scanner What Could The Problem Be.