DTC U0001-88; U0155; Unit Communication Error Malfunction: Notes

WARNING: This page is about a different car, the 2017 Mazda 3. However, it is still accessible from the selected car via links, so may be relevant.

DETECTION CONDITION AND POSSIBLE CAUSE

System malfunction location	U0001:88: Unit communication error (HS-CAN) U0155:00: Communication error with instrument cluster
Detection condition	U0001:88 SAS control module detects a CAN communication line (HS-CAN) error. U0155:00 SAS control module could not receive CAN signal from the instrument cluster for 5 s or more.
Fail-safe	Not applicable
Possible cause	Malfunction in CAN bus communication line Malfunction in CAN line between the SAS control module and instrument cluster
System wiring diagram	Not applicable