Tesla Alert Codes Explained
Every Tesla reports internal alert codes (like BMS_a117)
when something needs attention. Search the dictionary below to find what an alert means and what to do about it.
MyTeslaMate logs them automatically:
hosted TeslaMate with no server to run.
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| Signal Name | Description | Condition | Impact | Important |
|---|---|---|---|---|
|
Trailer Control Modulator: incorrect component installed.
|
|
-
|
No
|
|
|
Trailer Control Modulator / Pressure Control Valve / ESP power supply: Voltage out of range.
|
|
-
|
No
|
|
|
Trailer Control Modulator backup valve: Short to battery.
|
|
-
|
No
|
|
|
Trailer Control Modulator backup valve: Short to ground or open circuit.
|
|
-
|
No
|
|
|
Trailer Control Modulator inlet valve: Short to battery.
|
|
-
|
No
|
|
|
Trailer Control Modulator inlet valve: Short to ground or open circuit.
|
|
-
|
No
|
|
|
Trailer Control Modulator outlet valve: Short to battery.
|
|
-
|
No
|
|
|
Trailer Control Modulator outlet valve: Short to ground or open circuit.
|
|
-
|
No
|
|
|
Trailer Control Modulator pressure control: Implausible high pressure at end of braking and long term activation of valve controlled trailer brake switch.
|
|
-
|
No
|
|
|
Trailer Control Modulator pressure control: Implausible high pressure during not braking and long term activation of parking brake switch.
|
|
-
|
No
|
|
|
Trailer Control Modulator pressure control: Implausible high pressure during not braking and long term activation of valve controlled trailer brake switch.
|
|
-
|
No
|
|
|
Trailer Control Modulator pressure control: Implausible high pressure during outlet valve actuation and long term activation of valve controlled trailer brake switch.
|
|
-
|
No
|
|
|
Trailer Control Modulator pressure control: Implausible maximum pressure.
|
|
-
|
No
|
|
|
Trailer Control Modulator pressure control: Pressure compare plausibility fault, actuator stuck closed.
|
|
-
|
No
|
|
|
Trailer Control Modulator pressure control: Pressure compare plausibility fault, actuator stuck open.
|
|
-
|
No
|
|
|
Pressure Control Modulator Power Supply Wheel 5: Implausible drop of the signal level.
|
|
-
|
No
|
|
|
Pressure Control Modulator Power Supply Wheel 5: Current high, Short to ground.
|
|
-
|
No
|
|
|
Pressure Control Modulator Power Supply Wheel 4: Shorted channels (channel X is shorted to channel Y).
|
|
-
|
No
|
|
|
Pressure Control Modulator Power Supply Wheel 4: Short to ignition.
|
|
-
|
No
|
|
|
Pressure Control Modulator Power Supply Wheel 4: Short to battery.
|
|
-
|
No
|