Diagnostic library

Find an OBD2 code

Search the code from your scanner, then narrow the library by system, severity, or code family.

9,253 diagnostic guides

Sort

Find codes by symptomChoose what you notice to search matching code guides.

Rough idle or shakingVibration while stopped Hard to startLong cranking or no-start Engine stallsCuts out at idle or on the road Hesitates or loses powerSlow response when accelerating Battery light is onCharging system warning Harsh gear changesDelayed or rough shifting

A symptom can have several causes. Treat matching codes as clues and follow the diagnostic checks in each guide.

Check soon Clear all

Quick browse

Choose a vehicle system

Engine1049 Emissions515 Fuel1016 Sensors & Electronics2110 Transmission866 Electrical & Charging1797 Body & Restraints193 Chassis & Brakes479 Network & Communication1228

FiltersSeverity · family

Severity

All severities9253 Low priority305 Check soon8256 Urgent621

Code family

All families9253 P · Powertrain7353 B · Body193 C · Chassis479 U · Network1228

Vehicle coverage

These are generic OBD2 definitions. Exact make, model, engine, and year compatibility will appear after vehicle-fitment data is added.

Diagnostic codes

Showing 3505–3528 of 8256

Most searched first

P2058Reductant Injection Valve Circuit High Bank 2 Unit 2Check soonFuel System30–120 minutes for initial diagnosisP2058 relates to reductant injection valve circuit high bank 2 unit 2. Check the fault conditions and vehicle-specific procedure before replacing parts.P2059Reductant Injection Air Pump Control Circuit/OpenCheck soonFuel System30–120 minutes for initial diagnosisP2059 relates to reductant injection air pump control circuit/open. Check the fault conditions and vehicle-specific procedure before replacing parts.P205AReductant Tank Temperature Sensor A CircuitCheck soonSensors & Electronics30–120 minutes for initial diagnosisP205A relates to reductant tank temperature sensor a circuit. Check the fault conditions and vehicle-specific procedure before replacing parts.P205BReductant Tank Temperature Sensor A Circuit Range/PerformanceCheck soonSensors & Electronics30–120 minutes for initial diagnosisP205B relates to reductant tank temperature sensor a circuit range/performance. Check the fault conditions and vehicle-specific procedure before replacing parts.P205CReductant Tank Temperature Sensor A Circuit LowCheck soonSensors & Electronics30–120 minutes for initial diagnosisP205C relates to reductant tank temperature sensor a circuit low. Check the fault conditions and vehicle-specific procedure before replacing parts.P205DReductant Tank Temperature Sensor A Circuit HighCheck soonSensors & Electronics30–120 minutes for initial diagnosisP205D relates to reductant tank temperature sensor a circuit high. Check the fault conditions and vehicle-specific procedure before replacing parts.P205EReductant Tank Temperature Sensor A Circuit Intermittent/ErraticCheck soonSensors & Electronics30–120 minutes for initial diagnosisP205E relates to reductant tank temperature sensor a circuit intermittent/erratic. Check the fault conditions and vehicle-specific procedure before replacing parts.P205FReductant System Performance Bank 2Check soonSensors & Electronics30–120 minutes for initial diagnosisP205F relates to reductant system performance bank 2. Check the fault conditions and vehicle-specific procedure before replacing parts.P2060Reductant Injection Air Pump Control Circuit LowCheck soonFuel System30–120 minutes for initial diagnosisP2060 relates to reductant injection air pump control circuit low. Check the fault conditions and vehicle-specific procedure before replacing parts.P2061Reductant Injection Air Pump Control Circuit HighCheck soonFuel System30–120 minutes for initial diagnosisP2061 relates to reductant injection air pump control circuit high. Check the fault conditions and vehicle-specific procedure before replacing parts.P2062Reductant/Regeneration Supply Control Circuit/OpenCheck soonSensors & Electronics30–120 minutes for initial diagnosisP2062 relates to reductant/regeneration supply control circuit/open. Check the fault conditions and vehicle-specific procedure before replacing parts.P2063Reductant/Regeneration Supply Control Circuit LowCheck soonSensors & Electronics30–120 minutes for initial diagnosisP2063 relates to reductant/regeneration supply control circuit low. Check the fault conditions and vehicle-specific procedure before replacing parts.P2064Reductant/Regeneration Supply Control Circuit HighCheck soonSensors & Electronics30–120 minutes for initial diagnosisP2064 relates to reductant/regeneration supply control circuit high. Check the fault conditions and vehicle-specific procedure before replacing parts.P206AReductant Quality Sensor CircuitCheck soonSensors & Electronics30–120 minutes for initial diagnosisP206A relates to reductant quality sensor circuit. Check the fault conditions and vehicle-specific procedure before replacing parts.P206BReductant Quality Sensor Circuit Range/PerformanceCheck soonSensors & Electronics30–120 minutes for initial diagnosisP206B relates to reductant quality sensor circuit range/performance. Check the fault conditions and vehicle-specific procedure before replacing parts.P206CReductant Quality Sensor Circuit LowCheck soonSensors & Electronics30–120 minutes for initial diagnosisP206C relates to reductant quality sensor circuit low. Check the fault conditions and vehicle-specific procedure before replacing parts.P206DReductant Quality Sensor Circuit HighCheck soonSensors & Electronics30–120 minutes for initial diagnosisP206D relates to reductant quality sensor circuit high. Check the fault conditions and vehicle-specific procedure before replacing parts.P206EIntake Manifold Tuning (IMT) Valve Stuck Open Bank 2Check soonSensors & Electronics30–120 minutes for initial diagnosisP206E relates to intake manifold tuning (imt) valve stuck open bank 2. Check the fault conditions and vehicle-specific procedure before replacing parts.P206FIntake Manifold Tuning (IMT) Valve Stuck Closed Bank 2Check soonSensors & Electronics30–120 minutes for initial diagnosisP206F relates to intake manifold tuning (imt) valve stuck closed bank 2. Check the fault conditions and vehicle-specific procedure before replacing parts.P2070Intake Manifold Tuning (IMT) Valve Stuck Open Bank 1Check soonSensors & Electronics30–120 minutes for initial diagnosisP2070 relates to intake manifold tuning (imt) valve stuck open bank 1. Check the fault conditions and vehicle-specific procedure before replacing parts.P2071Intake Manifold Tuning (IMT) Valve Stuck Closed Bank 1Check soonSensors & Electronics30–120 minutes for initial diagnosisP2071 relates to intake manifold tuning (imt) valve stuck closed bank 1. Check the fault conditions and vehicle-specific procedure before replacing parts.P2072Throttle Actuator Control System - Ice Blockage Bank 1Check soonSensors & Electronics30–120 minutes for initial diagnosisP2072 relates to throttle actuator control system - ice blockage bank 1. Check the fault conditions and vehicle-specific procedure before replacing parts.P2073Manifold Absolute Pressure/Mass Air Flow - Throttle Position Correlation at IdleCheck soonSensors & Electronics30–120 minutes for initial diagnosisP2073 relates to manifold absolute pressure/mass air flow - throttle position correlation at idle. Check the fault conditions and vehicle-specific procedure before replacing parts.P2074Manifold Absolute Pressure/Mass Air Flow - Throttle Position Correlation at Higher LoadCheck soonSensors & Electronics30–120 minutes for initial diagnosisP2074 relates to manifold absolute pressure/mass air flow - throttle position correlation at higher load. Check the fault conditions and vehicle-specific procedure before replacing parts.