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.

Urgent 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 457–480 of 621

Most searched first

P0C4AHybrid/EV Battery Pack Coolant Pump A Control PerformanceUrgentElectrical & Charging System45–120 minutes for initial diagnosisP0C4A concerns hybrid/ev battery pack coolant pump a control performance. Learn what this fault indicates and where to begin diagnosis.P0C4BHybrid/EV Battery Pack Coolant Pump A Supply Voltage Circuit/OpenUrgentElectrical & Charging System45–120 minutes for initial diagnosisP0C4B concerns hybrid/ev battery pack coolant pump a supply voltage circuit/open. Learn what this fault indicates and where to begin diagnosis.P0C4CHybrid/EV Battery Pack Coolant Pump A Supply Voltage Circuit LowUrgentElectrical & Charging System45–120 minutes for initial diagnosisP0C4C concerns hybrid/ev battery pack coolant pump a supply voltage circuit low. Learn what this fault indicates and where to begin diagnosis.P0C4DHybrid/EV Battery Pack Coolant Pump A Supply Voltage Circuit HighUrgentElectrical & Charging System45–120 minutes for initial diagnosisP0C4D concerns hybrid/ev battery pack coolant pump a supply voltage circuit high. Learn what this fault indicates and where to begin diagnosis.P0CD5Hybrid/EV Battery Pack Coolant Temperature Sensor B CircuitUrgentElectrical & Charging System45–120 minutes for initial diagnosisP0CD5 concerns hybrid/ev battery pack coolant temperature sensor b circuit. Learn what this fault indicates and where to begin diagnosis.P0CD6Hybrid/EV Battery Pack Coolant Temperature Sensor B Circuit Range/PerformanceUrgentElectrical & Charging System45–120 minutes for initial diagnosisP0CD6 concerns hybrid/ev battery pack coolant temperature sensor b circuit range/performance. Learn what this fault indicates and where to begin diagnosis.P0CD7Hybrid/EV Battery Pack Coolant Temperature Sensor B Circuit LowUrgentElectrical & Charging System45–120 minutes for initial diagnosisP0CD7 concerns hybrid/ev battery pack coolant temperature sensor b circuit low. Learn what this fault indicates and where to begin diagnosis.P0CD8Hybrid/EV Battery Pack Coolant Temperature Sensor B Circuit HighUrgentElectrical & Charging System45–120 minutes for initial diagnosisP0CD8 concerns hybrid/ev battery pack coolant temperature sensor b circuit high. Learn what this fault indicates and where to begin diagnosis.P0CD9Hybrid/EV Battery Pack Coolant Temperature Sensor B Circuit Intermittent/ErraticUrgentElectrical & Charging System45–120 minutes for initial diagnosisP0CD9 concerns hybrid/ev battery pack coolant temperature sensor b circuit intermittent/erratic. Learn what this fault indicates and where to begin diagnosis.P0CDFHybrid/EV Battery Pack Coolant Control Valve A Control Circuit/OpenUrgentElectrical & Charging System45–120 minutes for initial diagnosisP0CDF concerns hybrid/ev battery pack coolant control valve a control circuit/open. Learn what this fault indicates and where to begin diagnosis.P0CE0Hybrid/EV Battery Pack Coolant Control Valve A Performance/Stuck OffUrgentElectrical & Charging System45–120 minutes for initial diagnosisP0CE0 concerns hybrid/ev battery pack coolant control valve a performance/stuck off. Learn what this fault indicates and where to begin diagnosis.P0CE1Hybrid/EV Battery Pack Coolant Control Valve A Stuck OnUrgentElectrical & Charging System45–120 minutes for initial diagnosisP0CE1 concerns hybrid/ev battery pack coolant control valve a stuck on. Learn what this fault indicates and where to begin diagnosis.P0CE2Hybrid/EV Battery Pack Coolant Control Valve A Control Circuit LowUrgentElectrical & Charging System45–120 minutes for initial diagnosisP0CE2 concerns hybrid/ev battery pack coolant control valve a control circuit low. Learn what this fault indicates and where to begin diagnosis.P0CE3Hybrid/EV Battery Pack Coolant Control Valve A Control Circuit HighUrgentElectrical & Charging System45–120 minutes for initial diagnosisP0CE3 concerns hybrid/ev battery pack coolant control valve a control circuit high. Learn what this fault indicates and where to begin diagnosis.P0CE4Hybrid/EV Battery Pack Coolant Control Valve Position Sensor CircuitUrgentElectrical & Charging System45–120 minutes for initial diagnosisP0CE4 concerns hybrid/ev battery pack coolant control valve position sensor circuit. Learn what this fault indicates and where to begin diagnosis.P0CE5Hybrid/EV Battery Pack Coolant Control Valve Position Sensor Circuit Range/PerformanceUrgentElectrical & Charging System45–120 minutes for initial diagnosisP0CE5 concerns hybrid/ev battery pack coolant control valve position sensor circuit range/performance. Learn what this fault indicates and where to begin diagnosis.P0CE6Hybrid/EV Battery Pack Coolant Control Valve Position Sensor Circuit LowUrgentElectrical & Charging System45–120 minutes for initial diagnosisP0CE6 concerns hybrid/ev battery pack coolant control valve position sensor circuit low. Learn what this fault indicates and where to begin diagnosis.P0CE7Hybrid/EV Battery Pack Coolant Control Valve Position Sensor Circuit HighUrgentElectrical & Charging System45–120 minutes for initial diagnosisP0CE7 concerns hybrid/ev battery pack coolant control valve position sensor circuit high. Learn what this fault indicates and where to begin diagnosis.P0CE8Hybrid/EV Battery Pack Coolant Control Valve Position Sensor Circuit Intermittent/ErraticUrgentElectrical & Charging System45–120 minutes for initial diagnosisP0CE8 concerns hybrid/ev battery pack coolant control valve position sensor circuit intermittent/erratic. Learn what this fault indicates and where to begin diagnosis.P0CFFHybrid/EV Battery Pack Coolant Pump A Stuck/StalledUrgentElectrical & Charging System45–120 minutes for initial diagnosisP0CFF concerns hybrid/ev battery pack coolant pump a stuck/stalled. Learn what this fault indicates and where to begin diagnosis.P0D15Battery Charging System A High Voltage Interlock Circuit/OpenUrgentElectrical & Charging System45–120 minutes for initial diagnosisP0D15 concerns battery charging system a high voltage interlock circuit/open. Learn what this fault indicates and where to begin diagnosis.P0D16Battery Charging System A High Voltage Interlock Circuit PerformanceUrgentElectrical & Charging System45–120 minutes for initial diagnosisP0D16 concerns battery charging system a high voltage interlock circuit performance. Learn what this fault indicates and where to begin diagnosis.P0D17Battery Charging System A High Voltage Interlock Circuit LowUrgentElectrical & Charging System45–120 minutes for initial diagnosisP0D17 concerns battery charging system a high voltage interlock circuit low. Learn what this fault indicates and where to begin diagnosis.P0D18Battery Charging System A High Voltage Interlock Circuit HighUrgentElectrical & Charging System45–120 minutes for initial diagnosisP0D18 concerns battery charging system a high voltage interlock circuit high. Learn what this fault indicates and where to begin diagnosis.