DTC B13FE-12: Headlight Lo Relay No. 2 Circuit Malfunction: Notes

WARNING: This page is about a different car, the 2018 Mazda 6. However, it is still accessible from the selected car via links, so may be relevant.

DTC B13FE:12 (FRONT BODY CONTROL MODULE (FBCM)) DETECTION CONDITION AND POSSIBLE CAUSE

Description	Headlight LO Relay No. 2 Circuit Malfunction
Detection condition	Front body control module (FBCM) detects a short to power supply in the headlight LO relay No. 2 circuit with the ignition switched ON (engine off or on).
Fail-safe	Not applicable
Possible cause	Headlight LO relay No. 2 malfunction Front body control module (FBCM) connector or terminal malfunction Short to power supply in the wiring harness between headlight LO relay No. 2 terminal E and front body control module (FBCM) terminal 1M Front body control module (FBCM) malfunction