Code TAS2_a041 was reported by the “Air suspension — newer control board” controller in the car. The letter “a” in the middle places it among entries of the alert type.
The newer air suspension control board. The codes mean the same as the TAS group, and the descriptions tend to be more detailed — including how often each check runs.
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.
The alert checks for height sensor PWM faults every 10ms. A weighted counter increments by 10 for every faulted reading and triggers the fault at a threshold of 50.
Set:
The rear right (RR) height sensor PWM signal has had a duty cycle equal to 100% for 50ms.
A weighted counter increments by 10 for every FAULT_TYPE_PWM_OPEN_CIRCUIT and triggers the fault at a threshold of 50.
Clear:
The rear right (RR) height sensor PWM signal has had a duty cycle less than 100% for 500ms.
A weighted counter decrements (from threshold of 50) by 1 for every valid reading and clears the fault when it reaches 0.
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.