Code ESP_a037 was reported by the “Stability control and ABS (ESP)” controller in the car. The letter “a” in the middle places it among entries of the alert type.
The electronic stability program — ESP, ABS, traction control and brake force distribution. These codes show up as warning lights and some assistance systems dropping out. The car still brakes, just without electronic help.
The most common type. The car logged the event and may have shown it on the screen. The range is wide — from something trivial that clears itself to something that needs attention.
This is how the fault is named inside the car's firmware. For codes without a description it is the most precise clue there is — the name itself says what the event is about.
The text below comes from Tesla's technical documentation. We leave it in the original English so that translation cannot shift its meaning.
Left Front Wheel Speed Sensor Supply Line Short to Gnd
Longitudinal Acceleration Sensor: Signal out of Range
Voltage at ESP supply pins exceeds specification
Verify voltage at ESP supply pins
Invalid Data Received From Gateway (VIN-Message): Data Length Code, Checksum or Parity invalid
Lateral Acceleration Sensor: Adjustment not possible (Offset too large)
Left Front Wheel Speed Sensor against second signal failed due WSS signal interferences or disturbances.
Copy it exactly, letter and number included. Photographing the screen is safest — codes often differ by a single digit, and mixing them up leads somewhere else entirely.
Some codes clear after a screen restart or after the car sits locked for a few hours. If the code does not come back, it was usually a one-off glitch.
A one-off entry and a code that appears after every drive are two different things. It helps a service centre enormously if you know exactly when it shows up.
With airbags, brakes, steering and high voltage there is no point waiting it out. With the other groups you can watch and see whether the code returns at all.
Error codes are only part of the picture. For cars on TesList you also see battery health pulled straight from the vehicle, plus a price calculator that works out from current listings what a given car is actually worth today.