RCU family
RCU_a001_valveDriverFault
Backup power braking assist unavailable
What does the RCU_a001_valveDriverFault alert mean?
The Redundant Control Unit (RCU) has experienced a solenoid valve driver issue.
What you'll see in your Tesla
- Backup power braking assist unavailable
- OK to drive - Schedule service
What triggers it
The RCU has experienced a solenoid value driver issue during actuation or startup checks.
When it clears
The RCU valve driver checks pass after the RCU is power cycled. If the issue persists, the RCU may need to be replaced.
Potential impact
The RCU may not be able to perform backup power braking assist.
Affected models
Model Y 2025+
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