Fault Code Database
EV DTC Code Library
Browse diagnostic trouble codes for every major EV platform. Click any code to start the step-by-step repair wizard.
B1234LowBody Controller Unexpected Wake State
The vehicle's primary body control network is failing to sleep when parked, staying stuck in an active state that draws continuous current. This internal logic bug prevents the vehicle from entering deep sleep mode, rapidly draining the low-voltage 12V auxiliary battery overnight.
Tesla, Rivian, Ford
P0C73MediumMotor Electronics Coolant Pump Performance Failure
The auxiliary electric coolant pump cooling the drive motors and power inverter is spinning at an incorrect speed or drawing improper current. This leaves electronics prone to overheating under heavy loads, triggering immediate power derating (limp mode).
Rivian
U1000LowOver-The-Air Update System Internal Fault
The vehicle's main network gateway has logged a deep internal processing error or firmware file corruption during an attempted Over-The-Air (OTA) software update. This system hang-up can lock or disable specific vehicle modules, preventing the car from clearing old fault memories until the software is restored.
Tesla, Ford, Rivian