RCU family
RCU_a046_brakeFluidLevelSNA
Not Available
What does the RCU_a046_brakeFluidLevelSNA alert mean?
Brake Booster (BB) brake fluid level signal BB_brakeFluidLevel is received as Signal Not Available (SNA).
What you'll see in your Tesla
- Not Available
What triggers it
The BB_brakeFluidLevel CAN signal is received by the Redundant Control Unit (RCU) as SNA for 5 seconds.
When it clears
The BB_brakeFluidLevel Controller Area Network (CAN) signal is received as valid for 5 seconds.
Potential impact
There may be an issue with the transmitting Electronic Control Unit (ECU).
Affected models
Model Y 2025+
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