FC family
FC_a159_CA_wdtExpired
Not Available
What does the FC_a159_CA_wdtExpired alert mean?
The Fast Charge (FC) Electronic Control Unit (ECU) has detected software watchdog timeout.
What you'll see in your Tesla
- Not Available
What triggers it
FC ECU detects software watchdog timeout.
When it clears
FC ECU automatically clears the alert by triggering a system reset.
Potential impact
Charging session may not start or may become interrupted.
Affected models
Cybertruck
Model 3 2017-2023
Model 3 2024+
Model S 2021+
Model X 2021+
Model Y
Model Y 2025+
Track your Tesla's alerts automatically
Alerts like this reach MyTeslaMate through your car's Tesla telemetry API. MyTeslaMate logs every alert your Tesla reports and turns it into readable history and real-time notifications — hosted TeslaMate with no server to run.