When keyless entry stops working on both fobs simultaneously on your 2020 Honda Pilot, the problem is almost certainly with the vehicle rather than the fobs themselves. While one bad fob is common, two failing at the same time points to a vehicle-side issue that needs attention.
Why Both Fobs Stopped Working
The odds of two independent fobs failing simultaneously are very low. When both lose keyless entry function, the problem is typically: the vehicle's keyless receiver module, the receiver antenna, power supply to the keyless system, or a body control module issue affecting the keyless circuit. Vehicle battery problems can also affect receiver operation.
Understanding the System
The Pilot's keyless entry uses a receiver that listens for specific radio frequency signals from authorized fobs. When you press unlock, the fob transmits its coded signal, the receiver decodes it and verifies authorization, then commands the doors to unlock. A failure anywhere in this chain prevents both fobs from working.
Diagnostic Indicators
Consider: Does the panic button work? (Tests fob transmission and receiver) Does the key blade still unlock the door? (Confirms mechanical locks work) Are there any dashboard warnings? Does remote start work if equipped? Can you still start the car with push button start? These answers help isolate the failure point.
Diagnostic Process
Check vehicle battery condition first—low voltage can affect the receiver. Verify the keyless system fuse is intact. Test for related electrical issues. A Honda diagnostic scanner can check the keyless receiver module for faults and verify communication. Check antenna connections if accessible.
Repair Solutions
Fuse replacement is simple and inexpensive. Battery or charging system issues need appropriate repair. Receiver module failure requires replacement and programming. Antenna issues may require access to body panels for repair. Having both fobs reprogrammed to the vehicle can resolve communication sync issues.