While a severe collision is the primary trigger, it's *theoretically* possible, though extremely rare and unlikely, for other things to cause it to malfunction and shut off:
* Faulty Inertial Sensor: A malfunctioning sensor could falsely detect a crash and engage the shut-off. This is less common, but a possibility.
* Wiring Issues: Damaged or shorted wiring related to the sensor or the fuel pump relay could interfere with the system.
* Low Voltage: Extremely low battery voltage might theoretically interfere with the system's proper operation, though this is generally not a primary cause of fuel shut-off.
It's important to note that if your Explorer's fuel system shuts off without a crash, you should have it professionally inspected to determine the cause. This is crucial for safety and proper vehicle operation. A simple electrical issue is likely more probable than a sensor spontaneously failing, but a mechanic needs to diagnose the root cause.