There are four cam sensors on that motor. One for each cam. That year has engine issues with the cams (head design) and sensor wiring/plugs and timing chains. So new sensor may not cure issue. First you have to know which sensor is reading bad before you replace it. You need code to determine that. P0019 crank/cam correlation error. This sounds like timing chain issue. This is a known issue with this year/model. They should replace on their dime.
Check out the diagrams (Below). Please let us know if you need anything else to get the problem fixed.
Images (Click to enlarge)
Sunday, April 15th, 2012 AT 2:47 PM