Technical Description (Comment)

WARNING: This page is about a different car, the 2015 Mitsubishi Lancer. However, it is still accessible from the selected car via links, so may be relevant.

The ETACS-ECU sets DTC B16A2 under the following conditions.

If there is a malfunction to the left turn-signal light bulb, the blown left bulb counter counts once when the illumination of hazard or turn-signal light (left side) is attempted.
After the bulb counter reaches "3," DTC B16A2 is set.