Sorry, Im showing up for this topic late, been very busy in the oil fields lately. As mentioned, just because the 'puter flagged the sensor doesn't gaurantee it. First check all the connectors for loosness, corrosion, trapped moisture. You need to do this inspection on all connectors in the whole system, not just the one flagged by the computer. Find "ALL" of your ground points and disconnect, clean and reconnect them. The system is very sensitive to high resistance to ground. Then double check all the positive connections coming off the positive lead for security and corrosion. Last, but not least, you may of recieved a bad 'NEW" part; check it against the manual for spec's. I've been a mech all my life and you would not believe how many bad new electronic parts I have recieved. Man, I need to get in here more often..........I'll check back in to see what you find; we'll get the problem solved.
Here is a good starting point for troubleshooting the system................
http://www.ncttora.com/fsm/2003/index.html