Mitsubishi B1a10 ❲Popular❳

Turn the ignition ON, then lock and unlock the doors using the fob. If the code returns immediately despite a new battery, the fob itself may be faulty.

Rarely, the KOS-ECU , ETACS-ECU, or WCM may be failing and misinterpreting signals. How to Fix and Clear the Code

This solves the issue in the vast majority of cases. Use a high-quality replacement battery and ensure the contacts are clean. mitsubishi b1a10

Ensure your keys are stored far enough away from the car when parked to prevent "parasitic" drain.

In Mitsubishi's electronic management system, every registered key fob is assigned a number. Code B1A10 corresponds to the registered with the KOS-ECU. Turn the ignition ON, then lock and unlock

Storing the key fob too close to the vehicle (within 25 feet) for extended periods can drain the battery as it constantly communicates with the KOS.

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 How to Fix and Clear the Code This

Internal damage to the key fob's circuitry.

The internal coin-cell battery (usually a CR2032) has dropped to 2.3V or lower.

While a dying battery is the most common culprit, several factors can trigger this fault: