DTC C1A67 04: Radar Sensor Internal Circuit Malfunction: Notes

WARNING: This page is about a different car, the 2014 Mazda 6. However, it is still accessible from the selected car via links, so may be relevant.

DTC C1A67:04 (VEHICLE CONTROL MODULE) DETECTION CONDITION AND POSSIBLE CAUSE

System malfunction location	Radar sensor internal circuit malfunction
Detection condition	Radar sensor internal circuit malfunction
Fail-safe	Inhibits the Mazda radar cruise control (MRCC) system control Inhibits the forward obstruction warning (FOW) system control
Possible cause	Generator system malfunction Battery malfunction C/U IG1 15 A fuse malfunction Open circuit or short to ground in wiring harness between battery positive terminal and radar sensor Radar sensor malfunction Vehicle control module (V/C-module) malfunction
Courtesy of MAZDA MOTORS CORP.