DTC U2639-14: Light Control Module (RH) Power Supply Circuit (B2+) Malfunction (BCM): Outline

WARNING: This page is about a different car, the 2020 Mazda CX-30. However, it is still accessible from the selected car via links, so may be relevant.

DTC U2639:14 (BCM) DETECTION CONDITION AND POSSIBLE CAUSE

System malfunction location	Light control module (RH) power supply circuit (B2+) malfunction
Detection condition	The light control module (RH) (built into front combination light (RH)) detects an open circuit in the power supply circuit (B2+).
Fail-safe	Not applicable
Possible cause	Front combination light (RH) connector or terminal malfunction Open circuit in front combination light (RH) power supply circuit (B2+) Front combination light (RH) internal malfunction Body control module (BCM) malfunction
Courtesy of MAZDA MOTORS CORP.