Use an OBDII scanner to erase the code from the vehicle's memory.
The ECU "judges" the battery as abnormal if it receives a low voltage signal from the transmitter . If you have a second key fob experiencing the same issue, you would likely see code B1A11 . Primary Causes of B1A10 mitsubishi b1a10
Internal damage to the key fob's circuitry. Use an OBDII scanner to erase the code
If the problem persists after a battery change and code reset, you may need to visit a dealership to register a new key ID or inspect the vehicle's wireless control module. 42B-B1A10 Keyless/KOS key 1 low battery - Mitsubishi mitsubishi b1a10