DTC B13D0 11: TNS 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 B13D0:11 (FRONT BODY CONTROL MODULE) DETECTION CONDITION AND POSSIBLE CAUSES

Description	TNS circuit malfunction
Detection condition	Front body control module (FBCM) detects a short to ground in the TNS relay circuit with the ignition switched ON (engine off or on).
Fail-safe function	Not applicable
Possible cause	TNS relay malfunction Front body control module (FBCM) connector or terminal malfunction Short to ground in wiring harness between TNS relay terminal E and front body control module (FBCM) terminal 1I Front body control module (FBCM) malfunction
Courtesy of MAZDA MOTORS CORP.