Redundant Control Unit (RCU) status message RCU_status was not received or message length is incorrect.
<0.01% (Extremely rare)
Backup power braking assist unavailable
OK to drive - Schedule service
There may be an issue with the transmitting Electronic Control Unit (ECU) or CAN bus.
Redundant Control Unit (RCU) status message RCU_status was not received or message length is incorrect.
RCU_status is not received for longer than 100 milliseconds or RCU_status is received with incorrect message length for longer than 100 milliseconds.
RCU_status Controller Area Network (CAN) message is received with the correct message length for 100 milliseconds.
Model Y 2025+
customer, service-fix
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