electronic locking differential

Hi, my name is Devin. I am an auto repair expert with the Car Genius team here at RepairPal. I'm sorry to hear you're having trouble with your F-150. If the differential won't release after switching from 4x4 low back to 4x2, it could be due to a few issues. The system may not be properly disengaging because of an electrical issue, a faulty switch, or a mechanical problem with the locking mechanism. Sometimes, clearing the codes with a scan tool or cycling the system through its full range can help, but if that doesn't work, it may require a more in-depth inspection of the actuator, wiring, or the differential itself. If you need more advice, have any other questions about your vehicle, or would like to get connected to a RepairPal Certified shop near you, we have you covered. Give us a call at 877-913-1554, and we will happily help you out!