DTC U0402:68 Error Signal Received From Transaxle [AWD Control Module]: Notes

WARNING: This page is about a different car, the 2025 Mazda CX-5. However, it is still accessible from the selected car via links, so may be relevant.

DTC U0402:68 (AWD CONTROL MODULE) DETECTION CONDITION AND POSSIBLE CAUSE

DTC U0402:68	Error signal received from transaxle
DETECTION CONDITION	The AWD control module received error signals from the transaxle for 5s or more with the ignition switched ON (engine off or on).
FAIL-SAFE FUNCTION	AWD operates by the specified data.
POSSIBLE CAUSE	The transaxle could not send a normal signal temporarily. (DTCs are stored in the TCM.) Transaxle malfunction AWD control module malfunction
SYSTEM WIRING DIAGRAM	Not applicable