Passive Anti-Theft System (Pats) Module
WARNING: This page is about a different car, the 2002 Ford Focus, 2001 Ford Focus, and 2000 Ford Focus. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
PATS module is built into PCM. If PCM is replaced, PCM must be reprogrammed and all ignition keys MUST be programmed into new PCM. See POWERTRAIN CONTROL MODULE in appropriate REMOVAL & INSTALLATION article in ENGINE PERFORMANCE.