HVP family
HVP_w038_CpilFault
Unable to charge
What does the HVP_w038_CpilFault alert mean?
The High Voltage Processor (HVP) has detected the Charge Port HV Interlock Loop (CPIL) has a condition affecting functionality.
What you'll see in your Tesla
- Unable to charge
- Service is required
What triggers it
The HVP General Purpose Input/Output (GPIO) input has detected the CPIL has a condition affecting functionality.
When it clears
The CPIL loop is complete
Potential impact
The Fast Charge (FC) link will not be allowed to charge. The vehicle may not charge as expected, or at all.
Affected models
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.