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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 P04 P2 Manufacturer codes

Showing 25–48 of 122 codes

P0150 O2 Sensor Circuit (Bank 2 Sensor 1) Medium Emissions & exhaust P0151 O2 Sensor Circuit Low Voltage (Bank 2 Sensor 1) Medium Emissions & exhaust P0152 O2 Sensor Circuit High Voltage (Bank 2 Sensor 1) Medium Emissions & exhaust P0153 O2 Sensor Circuit Slow Response (Bank 2 Sensor 1) Medium Emissions & exhaust P0154 O2 Sensor Circuit No Activity Detected (Bank 2 Sensor 1) Medium Emissions & exhaust P0155 O2 Sensor Heater Circuit (Bank 2 Sensor 1) Low Emissions & exhaust P0156 O2 Sensor Circuit (Bank 2 Sensor 2) Low Emissions & exhaust P0157 O2 Sensor Circuit Low Voltage (Bank 2 Sensor 2) Low Emissions & exhaust P0158 O2 Sensor Circuit High Voltage (Bank 2 Sensor 2) Low Emissions & exhaust P0159 O2 Sensor Circuit Slow Response (Bank 2 Sensor 2) Low Emissions & exhaust P0160 O2 Sensor Circuit No Activity Detected (Bank 2 Sensor 2) Low Emissions & exhaust P0161 O2 Sensor Heater Circuit (Bank 2 Sensor 2) Low Emissions & exhaust 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