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 625–648 of 7353

Most searched first

P02E2Diesel Intake Air Flow A Control Circuit LowCheck soonSensors & Electronics30–120 minutes for initial diagnosisP02E2 relates to diesel intake air flow a control circuit low. Check the fault conditions and vehicle-specific procedure before replacing parts.P02E3Diesel Intake Air Flow A Control Circuit HighCheck soonSensors & Electronics30–120 minutes for initial diagnosisP02E3 relates to diesel intake air flow a control circuit high. Check the fault conditions and vehicle-specific procedure before replacing parts.P02E4Diesel Intake Air Flow A Control Stuck OpenCheck soonSensors & Electronics30–120 minutes for initial diagnosisP02E4 relates to diesel intake air flow a control stuck open. Check the fault conditions and vehicle-specific procedure before replacing parts.P02E5Diesel Intake Air Flow A Control Stuck ClosedCheck soonSensors & Electronics30–120 minutes for initial diagnosisP02E5 relates to diesel intake air flow a control stuck closed. Check the fault conditions and vehicle-specific procedure before replacing parts.P02E6Diesel Intake Air Flow A Position Sensor CircuitCheck soonSensors & Electronics30–120 minutes for initial diagnosisP02E6 relates to diesel intake air flow a position sensor circuit. Check the fault conditions and vehicle-specific procedure before replacing parts.P02E7Diesel Intake Air Flow A Position Sensor Circuit Range/PerformanceCheck soonSensors & Electronics30–120 minutes for initial diagnosisP02E7 relates to diesel intake air flow a position sensor circuit range/performance. Check the fault conditions and vehicle-specific procedure before replacing parts.P02E8Diesel Intake Air Flow A Position Sensor Circuit LowCheck soonSensors & Electronics30–120 minutes for initial diagnosisP02E8 relates to diesel intake air flow a position sensor circuit low. Check the fault conditions and vehicle-specific procedure before replacing parts.P02E9Diesel Intake Air Flow A Position Sensor Circuit HighCheck soonSensors & Electronics30–120 minutes for initial diagnosisP02E9 relates to diesel intake air flow a position sensor circuit high. Check the fault conditions and vehicle-specific procedure before replacing parts.P02EADiesel Intake Air Flow A Position Sensor Circuit Intermittent/ErraticCheck soonSensors & Electronics30–120 minutes for initial diagnosisP02EA relates to diesel intake air flow a position sensor circuit intermittent/erratic. Check the fault conditions and vehicle-specific procedure before replacing parts.P02EBDiesel Intake Air Flow A Control Motor Current Range/PerformanceCheck soonSensors & Electronics30–120 minutes for initial diagnosisP02EB relates to diesel intake air flow a control motor current range/performance. Check the fault conditions and vehicle-specific procedure before replacing parts.P02ECDiesel Intake Air Flow A Control System - High Air Flow DetectedCheck soonSensors & Electronics30–120 minutes for initial diagnosisP02EC relates to diesel intake air flow a control system - high air flow detected. Check the fault conditions and vehicle-specific procedure before replacing parts.P02EDDiesel Intake Air Flow A Control System - Low Air Flow DetectedCheck soonSensors & Electronics30–120 minutes for initial diagnosisP02ED relates to diesel intake air flow a control system - low air flow detected. Check the fault conditions and vehicle-specific procedure before replacing parts.P02EECylinder 1 Injector Circuit Range/PerformanceCheck soonFuel System30–120 minutes for initial diagnosisP02EE relates to cylinder 1 injector circuit range/performance. Check the fault conditions and vehicle-specific procedure before replacing parts.P02EFCylinder 2 Injector Circuit Range/PerformanceCheck soonFuel System30–120 minutes for initial diagnosisP02EF relates to cylinder 2 injector circuit range/performance. Check the fault conditions and vehicle-specific procedure before replacing parts.P02F0Cylinder 3 Injector Circuit Range/PerformanceCheck soonFuel System30–120 minutes for initial diagnosisP02F0 relates to cylinder 3 injector circuit range/performance. Check the fault conditions and vehicle-specific procedure before replacing parts.P02F1Cylinder 4 Injector Circuit Range/PerformanceCheck soonFuel System30–120 minutes for initial diagnosisP02F1 relates to cylinder 4 injector circuit range/performance. Check the fault conditions and vehicle-specific procedure before replacing parts.P02F2Cylinder 5 Injector Circuit Range/PerformanceCheck soonFuel System30–120 minutes for initial diagnosisP02F2 relates to cylinder 5 injector circuit range/performance. Check the fault conditions and vehicle-specific procedure before replacing parts.P02F3Cylinder 6 Injector Circuit Range/PerformanceCheck soonFuel System30–120 minutes for initial diagnosisP02F3 relates to cylinder 6 injector circuit range/performance. Check the fault conditions and vehicle-specific procedure before replacing parts.P02F4Cylinder 7 Injector Circuit Range/PerformanceCheck soonFuel System30–120 minutes for initial diagnosisP02F4 relates to cylinder 7 injector circuit range/performance. Check the fault conditions and vehicle-specific procedure before replacing parts.P02F5Cylinder 8 Injector Circuit Range/PerformanceCheck soonFuel System30–120 minutes for initial diagnosisP02F5 relates to cylinder 8 injector circuit range/performance. Check the fault conditions and vehicle-specific procedure before replacing parts.P02F6Cylinder 9 Injector Circuit Range/PerformanceCheck soonFuel System30–120 minutes for initial diagnosisP02F6 relates to cylinder 9 injector circuit range/performance. Check the fault conditions and vehicle-specific procedure before replacing parts.P02F7Cylinder 10 Injector Circuit Range/PerformanceCheck soonFuel System30–120 minutes for initial diagnosisP02F7 relates to cylinder 10 injector circuit range/performance. Check the fault conditions and vehicle-specific procedure before replacing parts.P02F8Cylinder 11 Injector Circuit Range/PerformanceCheck soonFuel System30–120 minutes for initial diagnosisP02F8 relates to cylinder 11 injector circuit range/performance. Check the fault conditions and vehicle-specific procedure before replacing parts.P02F9Cylinder 12 Injector Circuit Range/PerformanceCheck soonFuel System30–120 minutes for initial diagnosisP02F9 relates to cylinder 12 injector circuit range/performance. Check the fault conditions and vehicle-specific procedure before replacing parts.