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.

Electrical & Charging System 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 121–144 of 1797

Most searched first

P094EHydraulic Pump Supply Voltage Circuit/OpenCheck soonElectrical & Charging System30–120 minutes for initial diagnosisP094E relates to hydraulic pump supply voltage circuit/open. Check the fault conditions and vehicle-specific procedure before replacing parts.P0A00Motor Electronics Coolant Temperature Sensor A CircuitCheck soonElectrical & Charging System45–120 minutes for initial diagnosisP0A00 concerns motor electronics coolant temperature sensor a circuit. Learn what this fault indicates and where to begin diagnosis.P0A01Motor Electronics Coolant Temperature Sensor A Circuit Range/PerformanceCheck soonElectrical & Charging System45–120 minutes for initial diagnosisP0A01 concerns motor electronics coolant temperature sensor a circuit range/performance. Learn what this fault indicates and where to begin diagnosis.P0A02Motor Electronics Coolant Temperature Sensor A Circuit LowCheck soonElectrical & Charging System45–120 minutes for initial diagnosisP0A02 concerns motor electronics coolant temperature sensor a circuit low. Learn what this fault indicates and where to begin diagnosis.P0A03Motor Electronics Coolant Temperature Sensor A Circuit HighCheck soonElectrical & Charging System45–120 minutes for initial diagnosisP0A03 concerns motor electronics coolant temperature sensor a circuit high. Learn what this fault indicates and where to begin diagnosis.P0A04Motor Electronics Coolant Temperature Sensor A Circuit IntermittentCheck soonElectrical & Charging System45–120 minutes for initial diagnosisP0A04 concerns motor electronics coolant temperature sensor a circuit intermittent. Learn what this fault indicates and where to begin diagnosis.P0A05Motor Electronics Coolant Pump A Control Circuit/OpenCheck soonElectrical & Charging System45–120 minutes for initial diagnosisP0A05 concerns motor electronics coolant pump a control circuit/open. Learn what this fault indicates and where to begin diagnosis.P0A06Motor Electronics Coolant Pump A Control Circuit LowCheck soonElectrical & Charging System45–120 minutes for initial diagnosisP0A06 concerns motor electronics coolant pump a control circuit low. Learn what this fault indicates and where to begin diagnosis.P0A07Motor Electronics Coolant Pump A Control Circuit HighCheck soonElectrical & Charging System45–120 minutes for initial diagnosisP0A07 concerns motor electronics coolant pump a control circuit high. Learn what this fault indicates and where to begin diagnosis.P0A08DC/DC Converter Status CircuitCheck soonElectrical & Charging System45–120 minutes for initial diagnosisP0A08 concerns dc/dc converter status circuit. Learn what this fault indicates and where to begin diagnosis.P0A09DC/DC Converter Status Circuit LowCheck soonElectrical & Charging System45–120 minutes for initial diagnosisP0A09 concerns dc/dc converter status circuit low. Learn what this fault indicates and where to begin diagnosis.P0A0AHigh Voltage System Interlock Circuit AUrgentElectrical & Charging System45–120 minutes for initial diagnosisP0A0A concerns high voltage system interlock circuit a. Learn what this fault indicates and where to begin diagnosis.P0A0BHigh Voltage System Interlock Circuit A PerformanceUrgentElectrical & Charging System45–120 minutes for initial diagnosisP0A0B concerns high voltage system interlock circuit a performance. Learn what this fault indicates and where to begin diagnosis.P0A0CHigh Voltage System Interlock Circuit A LowUrgentElectrical & Charging System45–120 minutes for initial diagnosisP0A0C concerns high voltage system interlock circuit a low. Learn what this fault indicates and where to begin diagnosis.P0A0DHigh Voltage System Interlock Circuit A HighUrgentElectrical & Charging System45–120 minutes for initial diagnosisP0A0D concerns high voltage system interlock circuit a high. Learn what this fault indicates and where to begin diagnosis.P0A0EHigh Voltage System Interlock Circuit A IntermittentUrgentElectrical & Charging System45–120 minutes for initial diagnosisP0A0E concerns high voltage system interlock circuit a intermittent. Learn what this fault indicates and where to begin diagnosis.P0A0FEngine Failed to StartCheck soonElectrical & Charging System45–120 minutes for initial diagnosisP0A0F concerns engine failed to start. Learn what this fault indicates and where to begin diagnosis.P0A10DC/DC Converter Status Circuit HighCheck soonElectrical & Charging System45–120 minutes for initial diagnosisP0A10 concerns dc/dc converter status circuit high. Learn what this fault indicates and where to begin diagnosis.P0A11DC/DC Converter Enable Circuit/OpenCheck soonElectrical & Charging System45–120 minutes for initial diagnosisP0A11 concerns dc/dc converter enable circuit/open. Learn what this fault indicates and where to begin diagnosis.P0A12DC/DC Converter Enable Circuit LowCheck soonElectrical & Charging System45–120 minutes for initial diagnosisP0A12 concerns dc/dc converter enable circuit low. Learn what this fault indicates and where to begin diagnosis.P0A13DC/DC Converter Enable Circuit HighCheck soonElectrical & Charging System45–120 minutes for initial diagnosisP0A13 concerns dc/dc converter enable circuit high. Learn what this fault indicates and where to begin diagnosis.P0A14Engine Mount A Control Circuit/OpenCheck soonElectrical & Charging System45–120 minutes for initial diagnosisP0A14 concerns engine mount a control circuit/open. Learn what this fault indicates and where to begin diagnosis.P0A15Engine Mount A Control Circuit LowCheck soonElectrical & Charging System45–120 minutes for initial diagnosisP0A15 concerns engine mount a control circuit low. Learn what this fault indicates and where to begin diagnosis.P0A16Engine Mount A Control Circuit HighCheck soonElectrical & Charging System45–120 minutes for initial diagnosisP0A16 concerns engine mount a control circuit high. Learn what this fault indicates and where to begin diagnosis.