HVREX family
HVREX_a156_FcNegCtrOpenFailVoltageMatchPres
Not Available
What does the HVREX_a156_FcNegCtrOpenFailVoltageMatchPres alert mean?
Negative contactor is expected to be open but the voltage match remains. Possible weld detected.
What you'll see in your Tesla
- Not Available
What triggers it
Contactor state timed out of OPENING (and transitioned to AUX_MISMATCH) due to a weld not having been disqualified.
When it clears
Contactor state is OPEN or PULLED_IN.
Potential impact
The pyro fuse may be deployed.
Affected models
Cybertruck
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.