Pressure Switch Circuit Open/Short
WARNING: This page is about a different car, the 1995 Dodge Dakota. However, it is still accessible from the selected car via links, so may be relevant.
This code is stored if condition is active when ignition is turned off. Possible causes are: open ACM pressure sense circuit, open ACM pressure switch, open sensor ground circuit, ACM pressure switch sense circuit short to voltage or ground, faulty air bag module, or faulty ACM.