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.
C1241MediumLow Auxiliary 12V System Operating Voltage
The auxiliary 12V battery powering the car's computers, door locks, screens, and safety relays has dropped below safe voltage. Even with a full traction battery, a dead 12V leaves the car unable to start or triggers a flood of false error codes across the dashboard.
MECH_BEAR_001CriticalWheel Bearing Assembly Failure Roaring
One of the vehicle's mechanical wheel hub bearings has suffered internal metallic breakdown along its ball races. This generates a distinct low-pitched roaring hum or grinding noise that grows progressively louder as you accelerate up to highway speeds.
Shop RequiredMECH_BRAKE_001LowBrake Pad Surface Rust Squeak
Because electric vehicles use high amounts of regenerative braking, the physical iron brake rotors are rarely clamped hard by the brake pads. This causes a thin layer of surface rust to accumulate on the discs, creating a loud squeaking sound during initial morning stops.
MECH_HEAT_001WarningCabin Heating Climate Control Failure
The climate control system is completely unable to heat the vehicle's interior cabin space due to a component failure in either the high-voltage PTC heater matrix or the electronic heat pump assembly. The vents will blow cold air despite turning up dashboard heat settings.
Shop RequiredMECH_MCU_001WarningCentral Touchscreen Blank Screen Freeze
The vehicle's central control screen has suddenly frozen or turned completely black due to an internal computer lockup or low-voltage power rail drop. Because this single screen handles everything from mirror adjustments to speed readouts, a lockup can disable convenience features.
MECH_PWR_001CriticalSudden Complete High Voltage Power Loss
The vehicle has experienced an instantaneous complete loss of high-voltage drivetrain propulsion while actively driving on the road. This dangerous fault is typically triggered by a sudden opening of the primary high-voltage battery safety contactor relays to isolate a major circuit issue.
Shop RequiredMECH_TIRE_001WarningHighway Speed Acoustic Foam Tire Vibration
The vehicle exhibits a distinct aggressive steering wheel shaking or interior cabin vibration specifically at highway speeds. This is often caused by the specialized internal acoustic noise-dampening foam layer inside the EV tire peeling away from the tread interior and bunching up into a balance-destroying lump.
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