Code SCS_a087 was reported by the “Supercharger — stall control” controller in the car. The letter “a” in the middle places it among entries of the alert type.
The control system of a Supercharger stall: voltage stages, isolation, cable temperature. Again these are charging infrastructure faults, not car faults. A large share of the numbers in this group are unused — spare slots in the firmware.
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.
Abnormal PWM signal received from front left PWM height sensor. More sensitive than other ride height sensor alerts.
Abnormal PWM signal received from front left ride height sensor.
Expected PWM signal received from front left ride height sensor.
Implausible condition detected on rear left air valve circuit.
Implausible condition detected on rear left air valve circuit, possibly due to ECU hardware failure.
Vehicle-power-state cycle from off to on.
Indicates there was an active connection to the XCP state machine
One or more CAN messages from VCFRONT are not being received by the ECU.
One or more CAN messages from VCFRONT are not being received by the ECU (missing, bad RX rate, or invalid checksum/counter).
Successful reception of all RXd CAN messages from VCFRONT.
Air suspension leveling may be disabled, or functionality may be reduced.
Next reboot after alert is present.
Air suspension is in jack mode.
Air suspension is in no longer in jack mode.
Air suspension leveling will be disabled.
Signal to UI to show suspension raising due to rough road notification.
Suspension height target change due to detection of rough road.
Rear left air valve detected open circuit.
Rear left air valve commanded on but no electrical current measured.
Abnormal PWM signal received from front right PWM height sensor.
Abnormal PWM signal received from front right ride height sensor.
Expected PWM signal received from front right ride height sensor.
Air suspension leveling will be disabled. Systems with adaptive dampers will disable active damping control.
Abnormal PWM signal received from rear right PWM height sensor. More sensitive than other ride height sensor alerts.
Abnormal PWM signal received from rear right ride height sensor.
Expected PWM signal received from rear right ride height sensor.
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.