Code RCM_d028 was reported by the “Airbags and restraints” controller in the car. The letter “d” in the middle places it among entries of the diagnostic entry type.
Had code RCM_d028 as well? Tell others how it turned out for you →
The Restraints Control Module — the controller for airbags, seatbelt pretensioners and crash detection. Codes in this group should never be ignored: they can mean an airbag will not deploy in a collision.
A service record that is not shown to the driver. Only a technician sees it in diagnostics.
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 control area network (CAN) GTW_airbagCutoffStatus message has a timeout error.
Fault condition is not checked during startup.
This fault does not cause Airbag Warning Indicator.
Signal NameDTCRCM_comGTWACSCntrRCM_C07969RCM_comGTWACSCRCRCM_C07870RCM_comGTWACSTORCM_C04500
This part is written by you. If you have had code RCM_d028, tell us when it appeared, what brought it on and how it ended — for the next person, one such sentence is often worth more than the entire service documentation.
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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.