OBD-II Trouble Codes: Search Meaning and Next Steps

Look up source-linked OBD-II code meanings, scanner limits, safety actions, and steps to discuss with a technician for US vehicles.

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P0010Bank 1 cam-actuator electrical circuit P0011Bank 1 intake timing too advanced P0012Bank 1 intake timing too retarded P0014Bank 1 exhaust timing too advanced P0015Bank 1 exhaust timing too retarded P0016Bank 1 crank/cam A correlation P0017Bank 1 crank/cam B correlation P0018Bank 2 crank/cam A correlation P0019Bank 2 crank/cam B correlation P0020Bank 2 cam-actuator electrical circuit P0021Bank 2 intake timing too advanced P0022Bank 2 intake timing too retarded P0024Bank 2 exhaust timing too advanced P0025Bank 2 exhaust timing too retarded P0030Bank 1 sensor 1 heater control P0050Bank 2 sensor 1 heater control P0053Bank 1 sensor 1 heater resistance P0059Bank 2 sensor 1 heater resistance P0100Airflow-sensor circuit fault P0101Airflow measurement performance mismatch P0102Airflow-sensor circuit signal low P0103Airflow-sensor circuit signal high P0104Intermittent airflow-sensor circuit signal P0112Intake-air temperature signal low P0113Intake-air temperature signal high P0117Coolant-temperature signal low P0118Coolant-temperature signal high P0121Throttle-position signal performance mismatch P0122Throttle-position signal low P0123Throttle-position signal high P0125Insufficient warmth for closed-loop operation P0128Warm-up below thermostat-regulation expectation P0131Bank 1 sensor 1 oxygen signal low P0133Bank 1 sensor 1 oxygen response slow P0135Bank 1 sensor 1 heater fault P0155Bank 2 sensor 1 heater fault P0171Bank 1 mixture too lean P0172Bank 1 mixture too rich P0174Bank 2 mixture too lean P0175Bank 2 mixture too rich P0300Random or multiple-cylinder misfire P0301Misfire reported for cylinder 1 P0302Misfire reported for cylinder 2 P0303Misfire reported for cylinder 3 P0304Misfire reported for cylinder 4 P0305Misfire reported for cylinder 5 P0306Misfire reported for cylinder 6 P0307Misfire reported for cylinder 7 P0308Misfire reported for cylinder 8 P0309Misfire reported for cylinder 9 P0310Misfire reported for cylinder 10 P0313Misfire with low-fuel context P0316Misfire during first 1,000 revolutions P0325Bank 1 knock-sensor circuit fault P0326Bank 1 knock-signal performance mismatch P0330Bank 2 knock-sensor circuit fault P0331Bank 2 knock-signal performance mismatch P0340Camshaft-position sensor circuit fault P0351Ignition-coil A circuit fault P0352Ignition-coil B circuit fault P0353Ignition-coil C circuit fault P0354Ignition-coil D circuit fault P0401EGR flow below expected amount P0402EGR flow above expected amount P0420Bank 1 catalyst-efficiency threshold not met P0430Bank 2 catalyst-efficiency threshold not met P0440Evaporative-emission system fault P0441Purge-flow performance mismatch P0442Small evaporative-system leak P0443Purge-control electrical circuit fault P0446Vent-control electrical circuit fault P0452EVAP pressure/switch signal low P0453EVAP pressure/switch signal high P0455Large evaporative-system leak P0456Very small evaporative-system leak P0457Evaporative leak with cap-loose/off context P0496Excessive/unexpected purge-flow context P0498EVAP vent-control signal low P0499EVAP vent-control signal high P0506Idle speed below expected target P0507Idle speed above expected target P0602Control-module programming error P0603Keep-alive memory fault P0605Read-only memory fault P0606Control-module processor fault P0700Transmission controller requests warning-lamp illumination P0715Input/turbine speed-sensor circuit fault P0716Input/turbine speed signal implausible P0718Intermittent input/turbine speed signal P0720Output-speed sensor circuit fault P0721Output-speed signal outside expected range P0722No output-speed sensor signal P0723Intermittent output-speed sensor signal P0740Torque-converter clutch control circuit P0741Torque-converter clutch not engaging as expected P1101 · ChevroletIntake-airflow performance mismatch P1326 · HyundaiKnock/KSDS-related fault; N-model water-intrusion branch P1326 · KiaKSDS knock-signal fault requiring the campaign diagnostic branch P1450 · FordFuel-tank vacuum cannot be relieved as expected P1A9096 · HyundaiICCU fault identifier used in recall diagnostics P219ABank 1 air/fuel imbalance P2404EVAP leak-pump sensing performance mismatch P2418Evaporative switching-valve control circuit P2682 · SubaruThermal-control/bypass-valve electrical circuit context P26CC · HondaEngine coolant-pump circuit low voltage U0073Communication bus A offline U0100Engine/powertrain module communication lost U0101Transmission module communication lost U0121Brake-control module communication lost U0128Parking-brake module communication lost U0140Body-control module communication lost U3012:68 · FordABS startup communication-related fault in the Ford bulletin P0130 · Source-specific manufacturer context; other vehicles need confirmationBank 1 Sensor 1 oxygen-sensor circuit fault P0141 · Source-specific manufacturer context; other vehicles need confirmationBank 1 Sensor 2 oxygen-sensor heater circuit fault P0335 · Source-specific manufacturer context; other vehicles need confirmationCrankshaft-position sensor A circuit fault P0500 · Source-specific manufacturer context; other vehicles need confirmationVehicle-speed sensor circuit fault

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P powertrain; B body; C chassis; U network. Tesla screen alerts and Honda Maintenance Minder items are separate namespaces. Generic emissions readers do not guarantee access to every module.

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Tesla screen alerts and Honda Maintenance Minder items are not generic emissions DTCs. Their manual scope, official-source links and remaining source limits are explained in separate indexes.

Tesla screen alertsExact alert ID and manual edition Honda Maintenance MinderMaintenance items, not trouble codes

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