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 5809–5832 of 7353

Most searched first

P2A03O2 Sensor Circuit Range/Performance Bank 2 Sensor 1Check soonSensors & Electronics30–120 minutes for initial diagnosisP2A03 relates to o2 sensor circuit range/performance bank 2 sensor 1. Check the fault conditions and vehicle-specific procedure before replacing parts.P2A04O2 Sensor Circuit Range/Performance Bank 2 Sensor 2Check soonSensors & Electronics30–120 minutes for initial diagnosisP2A04 relates to o2 sensor circuit range/performance bank 2 sensor 2. Check the fault conditions and vehicle-specific procedure before replacing parts.P2A05O2 Sensor Circuit Range/Performance Bank 2 Sensor 3Check soonSensors & Electronics30–120 minutes for initial diagnosisP2A05 relates to o2 sensor circuit range/performance bank 2 sensor 3. Check the fault conditions and vehicle-specific procedure before replacing parts.P2A06O2 Sensor Negative Voltage Bank 1 Sensor 1Check soonElectrical & Charging System30–120 minutes for initial diagnosisP2A06 relates to o2 sensor negative voltage bank 1 sensor 1. Check the fault conditions and vehicle-specific procedure before replacing parts.P2A07O2 Sensor Negative Voltage Bank 1 Sensor 2Check soonElectrical & Charging System30–120 minutes for initial diagnosisP2A07 relates to o2 sensor negative voltage bank 1 sensor 2. Check the fault conditions and vehicle-specific procedure before replacing parts.P2A08O2 Sensor Negative Voltage Bank 1 Sensor 3Check soonElectrical & Charging System30–120 minutes for initial diagnosisP2A08 relates to o2 sensor negative voltage bank 1 sensor 3. Check the fault conditions and vehicle-specific procedure before replacing parts.P2A09O2 Sensor Negative Voltage Bank 2 Sensor 1Check soonElectrical & Charging System30–120 minutes for initial diagnosisP2A09 relates to o2 sensor negative voltage bank 2 sensor 1. Check the fault conditions and vehicle-specific procedure before replacing parts.P2A0AManifold Absolute Pressure Sensor B CircuitCheck soonSensors & Electronics30–120 minutes for initial diagnosisP2A0A relates to manifold absolute pressure sensor b circuit. Check the fault conditions and vehicle-specific procedure before replacing parts.P2A0BManifold Absolute Pressure Sensor B Circuit Range/PerformanceCheck soonSensors & Electronics30–120 minutes for initial diagnosisP2A0B relates to manifold absolute pressure sensor b circuit range/performance. Check the fault conditions and vehicle-specific procedure before replacing parts.P2A0CManifold Absolute Pressure Sensor B Circuit LowCheck soonSensors & Electronics30–120 minutes for initial diagnosisP2A0C relates to manifold absolute pressure sensor b circuit low. Check the fault conditions and vehicle-specific procedure before replacing parts.P2A0DManifold Absolute Pressure Sensor B Circuit HighCheck soonSensors & Electronics30–120 minutes for initial diagnosisP2A0D relates to manifold absolute pressure sensor b circuit high. Check the fault conditions and vehicle-specific procedure before replacing parts.P2A0EManifold Absolute Pressure Sensor B Circuit Intermittent/ErraticCheck soonSensors & Electronics30–120 minutes for initial diagnosisP2A0E relates to manifold absolute pressure sensor b circuit intermittent/erratic. Check the fault conditions and vehicle-specific procedure before replacing parts.P2A0FFuel Supply Heater PerformanceCheck soonFuel System30–120 minutes for initial diagnosisP2A0F relates to fuel supply heater performance. Check the fault conditions and vehicle-specific procedure before replacing parts.P2A10O2 Sensor Negative Voltage Bank 2 Sensor 2Check soonElectrical & Charging System30–120 minutes for initial diagnosisP2A10 relates to o2 sensor negative voltage bank 2 sensor 2. Check the fault conditions and vehicle-specific procedure before replacing parts.P2A11O2 Sensor Negative Voltage Bank 2 Sensor 3Check soonElectrical & Charging System30–120 minutes for initial diagnosisP2A11 relates to o2 sensor negative voltage bank 2 sensor 3. Check the fault conditions and vehicle-specific procedure before replacing parts.P2A12Injection Pump Fuel Metering Control C (Cam/Rotor/Injector)Check soonFuel System30–120 minutes for initial diagnosisP2A12 relates to injection pump fuel metering control c (cam/rotor/injector). Check the fault conditions and vehicle-specific procedure before replacing parts.P2A13Injection Pump Fuel Metering Control C Range/Performance (Cam/Rotor/Injector)Check soonFuel System30–120 minutes for initial diagnosisP2A13 relates to injection pump fuel metering control c range/performance (cam/rotor/injector). Check the fault conditions and vehicle-specific procedure before replacing parts.P2A14Injection Pump Fuel Metering Control C Low (Cam/Rotor/Injector)Check soonFuel System30–120 minutes for initial diagnosisP2A14 relates to injection pump fuel metering control c low (cam/rotor/injector). Check the fault conditions and vehicle-specific procedure before replacing parts.P2A15Injection Pump Fuel Metering Control C High (Cam/Rotor/Injector)Check soonFuel System30–120 minutes for initial diagnosisP2A15 relates to injection pump fuel metering control c high (cam/rotor/injector). Check the fault conditions and vehicle-specific procedure before replacing parts.P2A16Injection Pump Fuel Metering Control D (Cam/Rotor/Injector)Check soonFuel System30–120 minutes for initial diagnosisP2A16 relates to injection pump fuel metering control d (cam/rotor/injector). Check the fault conditions and vehicle-specific procedure before replacing parts.P2A17Injection Pump Fuel Metering Control D Range/Performance (Cam/Rotor/Injector)Check soonFuel System30–120 minutes for initial diagnosisP2A17 relates to injection pump fuel metering control d range/performance (cam/rotor/injector). Check the fault conditions and vehicle-specific procedure before replacing parts.P2A18Injection Pump Fuel Metering Control D Low (Cam/Rotor/Injector)Check soonFuel System30–120 minutes for initial diagnosisP2A18 relates to injection pump fuel metering control d low (cam/rotor/injector). Check the fault conditions and vehicle-specific procedure before replacing parts.P2A19Injection Pump Fuel Metering Control D High (Cam/Rotor/Injector)Check soonFuel System30–120 minutes for initial diagnosisP2A19 relates to injection pump fuel metering control d high (cam/rotor/injector). Check the fault conditions and vehicle-specific procedure before replacing parts.P2A1AInjection Pump Fuel Metering Control E (Cam/Rotor/Injector)Check soonFuel System30–120 minutes for initial diagnosisP2A1A relates to injection pump fuel metering control e (cam/rotor/injector). Check the fault conditions and vehicle-specific procedure before replacing parts.