The tire pressure monitoring system (TPMS) of the 2010-2018 Ford Econoline (E150-E450) monitors the air pressure in the 4 road tires with wheel-mounted tire pressure sensors. The sensors transmit radio frequency signals to the smart junction box (SJB) approximately every 60 seconds when the vehicle speed exceeds 20 mph (32 km/h). If the vehicle is stationary for more than 30 minutes, the sensor will enter into a “sleep mode” and stop transmitting.
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