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 1393–1416 of 8256

Most searched first

P056DReductant Control Module System VoltageCheck soonElectrical & Charging System30–120 minutes for initial diagnosisP056D relates to reductant control module system voltage. Check the fault conditions and vehicle-specific procedure before replacing parts.P056ECold Start Turbocharger/Supercharger Boost Control A PerformanceCheck soonSensors & Electronics30–120 minutes for initial diagnosisP056E relates to cold start turbocharger/supercharger boost control a performance. Check the fault conditions and vehicle-specific procedure before replacing parts.P056FCold Start Turbocharger/Supercharger Boost Control B PerformanceCheck soonSensors & Electronics30–120 minutes for initial diagnosisP056F relates to cold start turbocharger/supercharger boost control b performance. Check the fault conditions and vehicle-specific procedure before replacing parts.P057ABrake Pedal Position Sensor A Circuit/OpenCheck soonSensors & Electronics30–120 minutes for initial diagnosisP057A relates to brake pedal position sensor a circuit/open. Check the fault conditions and vehicle-specific procedure before replacing parts.P057BBrake Pedal Position Sensor A Circuit Range/PerformanceCheck soonSensors & Electronics30–120 minutes for initial diagnosisP057B relates to brake pedal position sensor a circuit range/performance. Check the fault conditions and vehicle-specific procedure before replacing parts.P057CBrake Pedal Position Sensor A Circuit LowCheck soonSensors & Electronics30–120 minutes for initial diagnosisP057C relates to brake pedal position sensor a circuit low. Check the fault conditions and vehicle-specific procedure before replacing parts.P057DBrake Pedal Position Sensor A Circuit HighCheck soonSensors & Electronics30–120 minutes for initial diagnosisP057D relates to brake pedal position sensor a circuit high. Check the fault conditions and vehicle-specific procedure before replacing parts.P057EBrake Pedal Position Sensor A Circuit Intermittent/ErraticCheck soonSensors & Electronics30–120 minutes for initial diagnosisP057E relates to brake pedal position sensor a circuit intermittent/erratic. Check the fault conditions and vehicle-specific procedure before replacing parts.P057FBattery A State of Charge PerformanceCheck soonElectrical & Charging System30–120 minutes for initial diagnosisP057F relates to battery a state of charge performance. Check the fault conditions and vehicle-specific procedure before replacing parts.P058ABattery Monitor Module PerformanceCheck soonElectrical & Charging System30–120 minutes for initial diagnosisP058A relates to battery monitor module performance. Check the fault conditions and vehicle-specific procedure before replacing parts.P058BBattery Monitor Module Current Monitoring PerformanceCheck soonElectrical & Charging System30–120 minutes for initial diagnosisP058B relates to battery monitor module current monitoring performance. Check the fault conditions and vehicle-specific procedure before replacing parts.P058CBattery Monitor Module Temperature Monitoring PerformanceCheck soonElectrical & Charging System30–120 minutes for initial diagnosisP058C relates to battery monitor module temperature monitoring performance. Check the fault conditions and vehicle-specific procedure before replacing parts.P058DBattery Monitor Module Voltage Monitoring PerformanceCheck soonElectrical & Charging System30–120 minutes for initial diagnosisP058D relates to battery monitor module voltage monitoring performance. Check the fault conditions and vehicle-specific procedure before replacing parts.P058EBattery Monitor Module Temperature Too HighCheck soonElectrical & Charging System30–120 minutes for initial diagnosisP058E relates to battery monitor module temperature too high. Check the fault conditions and vehicle-specific procedure before replacing parts.P058FBattery Monitor Module Temperature Too LowCheck soonElectrical & Charging System30–120 minutes for initial diagnosisP058F relates to battery monitor module temperature too low. Check the fault conditions and vehicle-specific procedure before replacing parts.P0597Thermostat Heater Control Circuit/OpenCheck soonEngine Problems30–120 minutes for initial diagnosisP0597 relates to thermostat heater control circuit/open. Check the fault conditions and vehicle-specific procedure before replacing parts.P0598Thermostat Heater Control Circuit LowCheck soonEngine Problems30–120 minutes for initial diagnosisP0598 relates to thermostat heater control circuit low. Check the fault conditions and vehicle-specific procedure before replacing parts.P0599Thermostat Heater Control Circuit HighCheck soonEngine Problems30–120 minutes for initial diagnosisP0599 relates to thermostat heater control circuit high. Check the fault conditions and vehicle-specific procedure before replacing parts.P059AActive Grille Air Shutter A Position Sensor CircuitCheck soonSensors & Electronics30–120 minutes for initial diagnosisP059A relates to active grille air shutter a position sensor circuit. Check the fault conditions and vehicle-specific procedure before replacing parts.P059BActive Grille Air Shutter A Position Sensor Circuit Range/PerformanceCheck soonSensors & Electronics30–120 minutes for initial diagnosisP059B relates to active grille air shutter a position sensor circuit range/performance. Check the fault conditions and vehicle-specific procedure before replacing parts.P059CActive Grille Air Shutter A Position Sensor Circuit HighCheck soonSensors & Electronics30–120 minutes for initial diagnosisP059C relates to active grille air shutter a position sensor circuit high. Check the fault conditions and vehicle-specific procedure before replacing parts.P059DActive Grille Air Shutter A Position Sensor Circuit LowCheck soonSensors & Electronics30–120 minutes for initial diagnosisP059D relates to active grille air shutter a position sensor circuit low. Check the fault conditions and vehicle-specific procedure before replacing parts.P059EActive Grille Air Shutter A Position Sensor Circuit IntermittentCheck soonSensors & Electronics30–120 minutes for initial diagnosisP059E relates to active grille air shutter a position sensor circuit intermittent. Check the fault conditions and vehicle-specific procedure before replacing parts.P059FActive Grille Air Shutter A Performance/Stuck OffCheck soonSensors & Electronics30–120 minutes for initial diagnosisP059F relates to active grille air shutter a performance/stuck off. Check the fault conditions and vehicle-specific procedure before replacing parts.