DTC U0305 00/U0405 00: Abnormal Message From Vehicle Control Module (V/C-Module): 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 U0305:00/U0405:00 (DYNAMIC STABILITY CONTROL) DETECTION CONDITION AND POSSIBLE CAUSE

DTC	U0305:00, U0405:00	Abnormal message from Vehicle Control Module (V/C-Module)
DETECTION CONDITION	Correct data cannot be received from Vehicle Control Module (V/C-Module)
FAIL-SAFE FUNCTION	Does not illuminate any indicator/warning lights. Inhibits the Mazda Radar Cruise Control (MRCC).
POSSIBLE CAUSE	Vehicle Control Module (V/C-Module) malfunction
SYSTEM WIRING DIAGRAM	Not applicable