'link' — Mitsubishi B1a10

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

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

The internal coin-cell battery (usually a CR2032) has dropped to 2.3V or lower. While a dying battery is the most common

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

Use an OBDII scanner to erase the code from the vehicle's memory.

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

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.