93 Taurus Airbag Code

I have a 1993 Taurus that flashes an air bag code 42. Can anyone tell me which sensor causes this code

Here you go:
42 ³ Center Radiator Primary Crash Sensor Feed/Return Open

Done any work on your radiator lately?? I think this sensor is right below the plastic shield, which itself is held on with four or five 5/16 screws.. might be like three green-colored screws holding the airbag sensor on.. they're cranked pretty tight,, be careful fooling with it. I'd disconnect the battery cable, let it sit for a few minutes to drain the airbag power supply before I'd start looking for solutions.. looking further in my book, the positive battery cable must be removed, also be careful probing the wires..