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.

P · Powertrain 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 3385–3408 of 7353

Most searched first

P0E72Control Pilot Signal Low FrequencyCheck soonElectrical & Charging System45–120 minutes for initial diagnosisP0E72 concerns control pilot signal low frequency. Learn what this fault indicates and where to begin diagnosis.P0E73Control Pilot Signal High FrequencyCheck soonElectrical & Charging System45–120 minutes for initial diagnosisP0E73 concerns control pilot signal high frequency. Learn what this fault indicates and where to begin diagnosis.P0E74Hybrid/EV Battery Voltage Internal Isolation FaultUrgentElectrical & Charging System45–120 minutes for initial diagnosisP0E74 concerns hybrid/ev battery voltage internal isolation fault. Learn what this fault indicates and where to begin diagnosis.P0E75Coolant Bypass Valve A Control Circuit/OpenCheck soonElectrical & Charging System45–120 minutes for initial diagnosisP0E75 concerns coolant bypass valve a control circuit/open. Learn what this fault indicates and where to begin diagnosis.P0E76Coolant Bypass Valve A Control Circuit LowCheck soonElectrical & Charging System45–120 minutes for initial diagnosisP0E76 concerns coolant bypass valve a control circuit low. Learn what this fault indicates and where to begin diagnosis.P0E77Coolant Bypass Valve A Control Circuit HighCheck soonElectrical & Charging System45–120 minutes for initial diagnosisP0E77 concerns coolant bypass valve a control circuit high. Learn what this fault indicates and where to begin diagnosis.P0E78Coolant Bypass Valve A Control Circuit Range/PerformanceCheck soonElectrical & Charging System45–120 minutes for initial diagnosisP0E78 concerns coolant bypass valve a control circuit range/performance. Learn what this fault indicates and where to begin diagnosis.P0E79Coolant Bypass Valve A Control Stuck/OpenCheck soonElectrical & Charging System45–120 minutes for initial diagnosisP0E79 concerns coolant bypass valve a control stuck/open. Learn what this fault indicates and where to begin diagnosis.P0E7ACoolant Bypass Valve A Control Stuck ClosedCheck soonElectrical & Charging System45–120 minutes for initial diagnosisP0E7A concerns coolant bypass valve a control stuck closed. Learn what this fault indicates and where to begin diagnosis.P0E7BCoolant Bypass Valve B Control Circuit/OpenCheck soonElectrical & Charging System45–120 minutes for initial diagnosisP0E7B concerns coolant bypass valve b control circuit/open. Learn what this fault indicates and where to begin diagnosis.P0E7CCoolant Bypass Valve B Control Circuit LowCheck soonElectrical & Charging System45–120 minutes for initial diagnosisP0E7C concerns coolant bypass valve b control circuit low. Learn what this fault indicates and where to begin diagnosis.P0E7DCoolant Bypass Valve B Control Circuit HighCheck soonElectrical & Charging System45–120 minutes for initial diagnosisP0E7D concerns coolant bypass valve b control circuit high. Learn what this fault indicates and where to begin diagnosis.P0E7ECoolant Bypass Valve B Control Circuit Range/PerformanceCheck soonElectrical & Charging System45–120 minutes for initial diagnosisP0E7E concerns coolant bypass valve b control circuit range/performance. Learn what this fault indicates and where to begin diagnosis.P0E7FCoolant Bypass Valve B Control Stuck/OpenCheck soonElectrical & Charging System45–120 minutes for initial diagnosisP0E7F concerns coolant bypass valve b control stuck/open. Learn what this fault indicates and where to begin diagnosis.P0E80Coolant Bypass Valve B Control Stuck ClosedCheck soonElectrical & Charging System45–120 minutes for initial diagnosisP0E80 concerns coolant bypass valve b control stuck closed. Learn what this fault indicates and where to begin diagnosis.P0E81Auxiliary Cooling System Coolant Temperature Sensor A CircuitCheck soonElectrical & Charging System45–120 minutes for initial diagnosisP0E81 concerns auxiliary cooling system coolant temperature sensor a circuit. Learn what this fault indicates and where to begin diagnosis.P0E82Auxiliary Cooling System Coolant Temperature Sensor A Circuit Range/PerformanceCheck soonElectrical & Charging System45–120 minutes for initial diagnosisP0E82 concerns auxiliary cooling system coolant temperature sensor a circuit range/performance. Learn what this fault indicates and where to begin diagnosis.P0E83Auxiliary Cooling System Coolant Temperature Sensor A Circuit LowCheck soonElectrical & Charging System45–120 minutes for initial diagnosisP0E83 concerns auxiliary cooling system coolant temperature sensor a circuit low. Learn what this fault indicates and where to begin diagnosis.P0E84Auxiliary Cooling System Coolant Temperature Sensor A Circuit HighCheck soonElectrical & Charging System45–120 minutes for initial diagnosisP0E84 concerns auxiliary cooling system coolant temperature sensor a circuit high. Learn what this fault indicates and where to begin diagnosis.P0E85Battery Charger B Temperature Too HighCheck soonElectrical & Charging System45–120 minutes for initial diagnosisP0E85 concerns battery charger b temperature too high. Learn what this fault indicates and where to begin diagnosis.P0E86Battery Charger B Input Voltage Too LowCheck soonElectrical & Charging System45–120 minutes for initial diagnosisP0E86 concerns battery charger b input voltage too low. Learn what this fault indicates and where to begin diagnosis.P0E87Battery Charger B Input Voltage Too HighCheck soonElectrical & Charging System45–120 minutes for initial diagnosisP0E87 concerns battery charger b input voltage too high. Learn what this fault indicates and where to begin diagnosis.P0E88Battery Charger B Input Current Too LowCheck soonElectrical & Charging System45–120 minutes for initial diagnosisP0E88 concerns battery charger b input current too low. Learn what this fault indicates and where to begin diagnosis.P0E89Battery Charger B Input Current Too HighCheck soonElectrical & Charging System45–120 minutes for initial diagnosisP0E89 concerns battery charger b input current too high. Learn what this fault indicates and where to begin diagnosis.