OBD2 FAULTFINDER

OBD2 trouble codes

The standard codes every vehicle shares, described in plain language. These are free to read — the program is what reads them off your car.

545 codes

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B00xx · Airbags, seat belt pretensioners and seat sensors

C00xx · Wheel speed and steering angle sensors

C01xx · ABS pump, valve relay and brake switch circuits

C02xx · ABS motor relay circuit

C05xx · Chassis system disabled, information stored

P00xx · Fuel pressure, oxygen sensor heaters, cam and crank timing

P01xx · Air, temperature, throttle and oxygen sensors, fuel trim

P02xx · Injector circuits, fuel pump and turbo boost

P03xx · Misfires, ignition coils, crank and cam sensors

P04xx · Emission controls: EGR, catalyst, EVAP, secondary air

P05xx · Vehicle speed, idle control and auxiliary inputs

P06xx · Engine computer and its output circuits

P07xx · Automatic transmission sensors, gears and solenoids

P0Axx · Hybrid propulsion: battery pack and motor electronics

P20xx · Fuel, air and emissions, extended range

P21xx · Fuel, air and emissions, extended range

P22xx · Fuel, air and emissions, extended range

P24xx · Fuel, air and emissions, extended range

P26xx · Fuel, air and emissions, extended range

P2Axx · Fuel, air and emissions, extended range

U00xx · Communication bus: CAN bus faults and bus off

U01xx · Lost communication with a control module

U02xx · Lost communication, continued: seat, trailer, fuel and hybrid modules

U03xx · Software mismatch between control modules

U04xx · Invalid data received from a module