Diagnostic library

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

9,253 diagnostic guides

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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.

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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 745–768 of 1570

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P0CECHybrid/EV Electronics Coolant Pump A Control Circuit HighCheck soonElectrical & Charging System45–120 minutes for initial diagnosisP0CEC concerns hybrid/ev electronics coolant pump a control circuit high. Learn what this fault indicates and where to begin diagnosis.P0CEDHybrid/EV Electronics Coolant Pump A Enable CircuitCheck soonElectrical & Charging System45–120 minutes for initial diagnosisP0CED concerns hybrid/ev electronics coolant pump a enable circuit. Learn what this fault indicates and where to begin diagnosis.P0CEEHybrid/EV Electronics Coolant Temperature Sensor A CircuitCheck soonElectrical & Charging System45–120 minutes for initial diagnosisP0CEE concerns hybrid/ev electronics coolant temperature sensor a circuit. Learn what this fault indicates and where to begin diagnosis.P0CEFHybrid/EV Electronics Coolant Temperature Sensor A Circuit Range/PerformanceCheck soonElectrical & Charging System45–120 minutes for initial diagnosisP0CEF concerns hybrid/ev electronics coolant temperature sensor a circuit range/performance. Learn what this fault indicates and where to begin diagnosis.P0CF0Hybrid/EV Electronics Coolant Temperature Sensor A Circuit LowCheck soonElectrical & Charging System45–120 minutes for initial diagnosisP0CF0 concerns hybrid/ev electronics coolant temperature sensor a circuit low. Learn what this fault indicates and where to begin diagnosis.P0CF1Hybrid/EV Electronics Coolant Temperature Sensor A Circuit HighCheck soonElectrical & Charging System45–120 minutes for initial diagnosisP0CF1 concerns hybrid/ev electronics coolant temperature sensor a circuit high. Learn what this fault indicates and where to begin diagnosis.P0CF2Hybrid/EV Electronics Coolant Temperature Sensor A Circuit Intermittent/ErraticCheck soonElectrical & Charging System45–120 minutes for initial diagnosisP0CF2 concerns hybrid/ev electronics coolant temperature sensor a circuit intermittent/erratic. Learn what this fault indicates and where to begin diagnosis.P0CF3Control Pilot Circuit /OpenCheck soonElectrical & Charging System45–120 minutes for initial diagnosisP0CF3 concerns control pilot circuit /open. Learn what this fault indicates and where to begin diagnosis.P0CF4Control Pilot Circuit Range/PerformanceCheck soonElectrical & Charging System45–120 minutes for initial diagnosisP0CF4 concerns control pilot circuit range/performance. Learn what this fault indicates and where to begin diagnosis.P0CF5Control Pilot Circuit LowCheck soonElectrical & Charging System45–120 minutes for initial diagnosisP0CF5 concerns control pilot circuit low. Learn what this fault indicates and where to begin diagnosis.P0CF6Control Pilot Circuit HighCheck soonElectrical & Charging System45–120 minutes for initial diagnosisP0CF6 concerns control pilot circuit high. Learn what this fault indicates and where to begin diagnosis.P0CF7Control Pilot Circuit Intermittent/ErraticCheck soonElectrical & Charging System45–120 minutes for initial diagnosisP0CF7 concerns control pilot circuit intermittent/erratic. Learn what this fault indicates and where to begin diagnosis.P0CF8Control Pilot Charging Switch A Circuit/OpenCheck soonElectrical & Charging System45–120 minutes for initial diagnosisP0CF8 concerns control pilot charging switch a circuit/open. Learn what this fault indicates and where to begin diagnosis.P0CF9Control Pilot Charging Switch A Range/PerformanceCheck soonElectrical & Charging System45–120 minutes for initial diagnosisP0CF9 concerns control pilot charging switch a range/performance. Learn what this fault indicates and where to begin diagnosis.P0CFAControl Pilot Charging Switch A Circuit LowCheck soonElectrical & Charging System45–120 minutes for initial diagnosisP0CFA concerns control pilot charging switch a circuit low. Learn what this fault indicates and where to begin diagnosis.P0CFBControl Pilot Charging Switch A Circuit HighCheck soonElectrical & Charging System45–120 minutes for initial diagnosisP0CFB concerns control pilot charging switch a circuit high. Learn what this fault indicates and where to begin diagnosis.P0CFCControl Pilot Charging Switch A Intermittent/ErraticCheck soonElectrical & Charging System45–120 minutes for initial diagnosisP0CFC concerns control pilot charging switch a intermittent/erratic. Learn what this fault indicates and where to begin diagnosis.P0CFDControl Pilot Charging Switch A Stuck OffCheck soonElectrical & Charging System45–120 minutes for initial diagnosisP0CFD concerns control pilot charging switch a stuck off. Learn what this fault indicates and where to begin diagnosis.P0CFEControl Pilot Charging Switch A Stuck OnCheck soonElectrical & Charging System45–120 minutes for initial diagnosisP0CFE concerns control pilot charging switch a stuck on. Learn what this fault indicates and where to begin diagnosis.P0D00Control Pilot Charging Ventilation Switch Circuit/OpenCheck soonElectrical & Charging System45–120 minutes for initial diagnosisP0D00 concerns control pilot charging ventilation switch circuit/open. Learn what this fault indicates and where to begin diagnosis.P0D01Control Pilot Charging Ventilation Switch Range/PerformanceCheck soonElectrical & Charging System45–120 minutes for initial diagnosisP0D01 concerns control pilot charging ventilation switch range/performance. Learn what this fault indicates and where to begin diagnosis.P0D02Control Pilot Charging Ventilation Switch Circuit LowCheck soonElectrical & Charging System45–120 minutes for initial diagnosisP0D02 concerns control pilot charging ventilation switch circuit low. Learn what this fault indicates and where to begin diagnosis.P0D03Control Pilot Charging Ventilation Switch Circuit HighCheck soonElectrical & Charging System45–120 minutes for initial diagnosisP0D03 concerns control pilot charging ventilation switch circuit high. Learn what this fault indicates and where to begin diagnosis.P0D04Control Pilot Charging Ventilation Switch Intermittent/ErraticCheck soonElectrical & Charging System45–120 minutes for initial diagnosisP0D04 concerns control pilot charging ventilation switch intermittent/erratic. Learn what this fault indicates and where to begin diagnosis.