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Car Fault Codes

OBD-II trouble codes explained: meaning, causes, symptoms, fixes and typical repair cost.

Category All Fuel & air Ignition & misfire Emissions & exhaust Cooling & lubrication Speed & idle Engine computer & electrical Transmission Hybrid & EV Network Body Chassis & brakes
Brand All ToyotaNissanChevroletHondaFordGMCLexusMitsubishiHyundaiKia
Jump to All P00 P01 P02 P03 P04 P05 P06 P07 P08 P0A P2 U0 B0 C0 Manufacturer codes

Showing 1–24 of 42 codes

P0400 Exhaust Gas Recirculation (EGR) "A" Flow Malfunction Medium Emissions & exhaust P0401 Exhaust Gas Recirculation (EGR) "A" Flow Insufficient Detected Medium Emissions & exhaust P0402 Exhaust Gas Recirculation (EGR) "A" Flow Excessive Detected Medium Emissions & exhaust P0403 Exhaust Gas Recirculation (EGR) "A" Control Circuit Medium Emissions & exhaust P0404 Exhaust Gas Recirculation (EGR) "A" Control Circuit Range/Performance Medium Emissions & exhaust P0405 Exhaust Gas Recirculation (EGR) Sensor "A" Circuit Low Medium Emissions & exhaust P0406 Exhaust Gas Recirculation (EGR) Sensor "A" Circuit High Medium Emissions & exhaust P0410 Secondary Air Injection System Malfunction Low Emissions & exhaust P0411 Secondary Air Injection System Incorrect Flow Detected Low Emissions & exhaust P0412 Secondary Air Injection System Switching Valve "A" Circuit Low Emissions & exhaust P0418 Secondary Air Injection System Control "A" Circuit Low Emissions & exhaust P0420 Catalyst System Efficiency Below Threshold (Bank 1) Medium Emissions & exhaust P0421 Warm Up Catalyst Efficiency Below Threshold (Bank 1) Medium Emissions & exhaust P0430 Catalyst System Efficiency Below Threshold (Bank 2) Medium Emissions & exhaust P0431 Warm Up Catalyst Efficiency Below Threshold (Bank 2) Medium Emissions & exhaust P0440 Evaporative Emission (EVAP) System Malfunction Low Emissions & exhaust P0441 Evaporative Emission (EVAP) System Incorrect Purge Flow Low Emissions & exhaust P0442 Evaporative Emission (EVAP) System Leak Detected (Small Leak) Low Emissions & exhaust P0443 EVAP System Purge Control Valve "A" Circuit Low Emissions & exhaust P0444 EVAP System Purge Control Valve "A" Circuit Open Low Emissions & exhaust P0445 EVAP System Purge Control Valve "A" Circuit Shorted Low Emissions & exhaust P0446 EVAP System Vent Control Circuit Low Emissions & exhaust P0447 EVAP System Vent Control Circuit Open Low Emissions & exhaust P0448 EVAP System Vent Control Circuit Shorted Low Emissions & exhaust