DTC B13C3: 04 LF Control Unit Internal Malfunction: Notes

WARNING: This page is about a different car, the 2014 Mazda 3. However, it is still accessible from the selected car via links, so may be relevant.

DTC B13C3:04 DETECTION CONDITION AND POSSIBLE CAUSE

Description	LF control unit internal malfunction
Detection condition	Start stop unit detects the LF control unit internal malfunction.
Fail-safe function	Inhibits the door lock/unlock control using the advanced keyless entry system.
Possible cause	LF control unit internal malfunction Start stop unit malfunction
System wiring diagram	Not applicable