Diagnostic Aids
WARNING: This page is about a different car, the 2001 Pontiac Grand Prix, 2001 Pontiac Firebird, 2001 Oldsmobile Intrigue, and 2001 Chevrolet Camaro. However, it is still accessible from the selected car via links, so may be relevant.
Possible causes of this DTC are open, short to ground or short to battery voltage in pressure sensor 5-volt reference circuit.