Code TAS_a076 was reported by the “Air suspension” controller in the car. The letter “a” in the middle places it among entries of the alert type.
Tesla Air Suspension — the air chassis: compressor, valves, ride height sensors. These codes show up as the car being unable to raise or level the body, or reporting a loss of pressure. On Model S and X this is a common age-related fault.
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.
Off board 5V switched supply is measured to be over 5.5V.
Front left air valve detected open circuit.
Front left air valve commanded on but no electrical current measured.
An issue is indicated from the NVRAM Manager.
Record not found, CRC mismatch, Version mismatch, Version upgrade.
Ride height calibration, target suspension level, crash status, or learned VIN may be lost.
Pressure sensor signal voltage too low; likely disconnected.
Pressure sensor signal received is too low.
Pressure sensor signal received is in range.
One or more CAN messages from DI are not being received by the ECU.
One or more CAN messages from DI are not being received by the ECU (missing, bad RX rate, or invalid checksum/counter).
Successful reception of all RXd CAN messages from DI.
Air suspension functionality may be reduced. Excessive leveling corrections may occur and system may not lower suspension at higher speeds.
No valid ride height sensor calibrations have been saved to the ECU.
Received ride height sensor calibration values are inside of allowable range.
Air suspension will only level upon manual requests. Auto leveling of suspension is disabled.
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.