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
Find codes by symptomChoose what you notice to search matching code guides.
Rough idle or shakingVibration while stoppedHard to startLong cranking or no-startEngine stallsCuts out at idle or on the roadHesitates or loses powerSlow response when acceleratingBattery light is onCharging system warningHarsh gear changesDelayed or rough shifting
A symptom can have several causes. Treat matching codes as clues and follow the diagnostic checks in each guide.
Quick browse
Choose a vehicle system
FiltersSeverity · family
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 1225–1248 of 1797
P0E4FMotor Electronics Coolant Pump A Control Circuit Intermittent/ErraticCheck soonElectrical & Charging System45–120 minutes for initial diagnosisP0E50Motor Electronics Coolant Pump B Control Circuit Intermittent/ErraticCheck soonElectrical & Charging System45–120 minutes for initial diagnosisP0E51DC/DC Converter Current Sensor A CircuitCheck soonElectrical & Charging System45–120 minutes for initial diagnosisP0E52DC/DC Converter Current Sensor A Circuit Range/PerformanceCheck soonElectrical & Charging System45–120 minutes for initial diagnosisP0E53DC/DC Converter Current Sensor A Circuit LowCheck soonElectrical & Charging System45–120 minutes for initial diagnosisP0E54DC/DC Converter Current Sensor A Circuit HighCheck soonElectrical & Charging System45–120 minutes for initial diagnosisP0E55DC/DC Converter Current Sensor A Circuit Intermittent/ErraticCheck soonElectrical & Charging System45–120 minutes for initial diagnosisP0E56DC/DC Converter Input Voltage Too LowCheck soonElectrical & Charging System45–120 minutes for initial diagnosisP0E57DC/DC Converter Input Voltage Too HighCheck soonElectrical & Charging System45–120 minutes for initial diagnosisP0E58DC/DC Converter Temperature Sensor C CircuitCheck soonElectrical & Charging System45–120 minutes for initial diagnosisP0E59DC/DC Converter Temperature Sensor C Circuit Range/PerformanceCheck soonElectrical & Charging System45–120 minutes for initial diagnosisP0E5ADC/DC Converter Temperature Sensor C Circuit LowCheck soonElectrical & Charging System45–120 minutes for initial diagnosisP0E5BDC/DC Converter Temperature Sensor C Circuit HighCheck soonElectrical & Charging System45–120 minutes for initial diagnosisP0E5CDC/DC Converter Temperature Sensor C Circuit Intermittent/ErraticCheck soonElectrical & Charging System45–120 minutes for initial diagnosisP0E5DDC/DC Converter Enable Circuit intermittent/ErraticCheck soonElectrical & Charging System45–120 minutes for initial diagnosisP0E5EBattery Charger Control Module A Processor PerformanceCheck soonElectrical & Charging System45–120 minutes for initial diagnosisP0E5FBattery Charger Coupler Temperature A Too HighCheck soonElectrical & Charging System45–120 minutes for initial diagnosisP0E60Battery Charge Mode Control Circuit Range/PerformanceCheck soonElectrical & Charging System45–120 minutes for initial diagnosisP0E61Battery Charger A Enable Circuit/OpenCheck soonElectrical & Charging System45–120 minutes for initial diagnosisP0E62Battery Charger A Enable Circuit LowCheck soonElectrical & Charging System45–120 minutes for initial diagnosisP0E63Battery Charger A Enable Circuit HighCheck soonElectrical & Charging System45–120 minutes for initial diagnosisP0E64Battery Charger A Enable Circuit Range/PerformanceCheck soonElectrical & Charging System45–120 minutes for initial diagnosisP0E65Battery Charger Control Circuit/OpenCheck soonElectrical & Charging System45–120 minutes for initial diagnosisP0E66Battery Charger Control Circuit LowCheck soonElectrical & Charging System45–120 minutes for initial diagnosis