The Technical Definition: The Wireless Control Module (WCM) or Sentry Key Immobilizer Module (SKIM) does not recognize the RFID transponder chip inside the ignition key being used to start the vehicle.

Common Symptoms: The engine will crank and start, but it will immediately stall after two or three seconds. The small red security dot on the dashboard will flash rapidly or remain solidly lit.

Typical Fix: Always try your spare key first to rule out a dead chip in the primary key. If both keys fail, the WCM (the module around the ignition cylinder) has likely locked up or failed. Disconnecting the negative battery terminal for 15 minutes can sometimes perform a hard reset on the module and temporarily allow the vehicle to start.