If your gas-powered car was manufactured after 1991, it is most likely equipped with a mandatory On Board Diagnostic (OBD) system – a computer that monitors the health of the engine and various other components, effectively functioning like a doctor for your car.
For electric cars, a standardized OBD system has been notably absent. Since EVs don't have traditional powertrain components, their systems, including batteries and electric motors require automakers and emissions control agencies to rethink how to provide uniform and accurate data to owners and service centers.
It seems like the authorities have taken this matter seriously. From 2026, California Air Resources Board's (CARB) Advanced Clean Cars II program would require automakers to equip their EVs with a standard diagnostic system, similar to the OBD II in ICE cars, a CARB spokesperson told InsideEVs.
"It's the same connector, same communications protocol, but it’s not OBD," said John Swanton, Air Pollution Specialist at the office of communications at CARB. "The important thing is that it will be a useful and familiar resource for both consumers and service providers."