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.

Check soon 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 3409–3432 of 6682

Most searched first

P2159Vehicle Speed Sensor B Circuit Range/PerformanceCheck soonSensors & Electronics30–120 minutes for initial diagnosisP2159 relates to vehicle speed sensor b circuit range/performance. Check the fault conditions and vehicle-specific procedure before replacing parts.P215AVehicle Speed - Wheel Speed CorrelationCheck soonSensors & Electronics30–120 minutes for initial diagnosisP215A relates to vehicle speed - wheel speed correlation. Check the fault conditions and vehicle-specific procedure before replacing parts.P215BVehicle Speed - Output Shaft Speed CorrelationCheck soonSensors & Electronics30–120 minutes for initial diagnosisP215B relates to vehicle speed - output shaft speed correlation. Check the fault conditions and vehicle-specific procedure before replacing parts.P215COutput Shaft Speed - Wheel Speed CorrelationCheck soonSensors & Electronics30–120 minutes for initial diagnosisP215C relates to output shaft speed - wheel speed correlation. Check the fault conditions and vehicle-specific procedure before replacing parts.P215DReductant Pump B Stuck OnCheck soonSensors & Electronics30–120 minutes for initial diagnosisP215D relates to reductant pump b stuck on. Check the fault conditions and vehicle-specific procedure before replacing parts.P215EReductant Heater D Current Too LowCheck soonSensors & Electronics30–120 minutes for initial diagnosisP215E relates to reductant heater d current too low. Check the fault conditions and vehicle-specific procedure before replacing parts.P215FReductant Heater D Current Too HighCheck soonSensors & Electronics30–120 minutes for initial diagnosisP215F relates to reductant heater d current too high. Check the fault conditions and vehicle-specific procedure before replacing parts.P2160Vehicle Speed Sensor B Circuit LowCheck soonSensors & Electronics30–120 minutes for initial diagnosisP2160 relates to vehicle speed sensor b circuit low. Check the fault conditions and vehicle-specific procedure before replacing parts.P2161Vehicle Speed Sensor B Circuit Intermittent/Erratic/HighCheck soonSensors & Electronics30–120 minutes for initial diagnosisP2161 relates to vehicle speed sensor b circuit intermittent/erratic/high. Check the fault conditions and vehicle-specific procedure before replacing parts.P2162Vehicle Speed Sensor A/B CorrelationCheck soonSensors & Electronics30–120 minutes for initial diagnosisP2162 relates to vehicle speed sensor a/b correlation. Check the fault conditions and vehicle-specific procedure before replacing parts.P2163Throttle/Pedal Position Sensor A Maximum Stop PerformanceCheck soonSensors & Electronics30–120 minutes for initial diagnosisP2163 relates to throttle/pedal position sensor a maximum stop performance. Check the fault conditions and vehicle-specific procedure before replacing parts.P2164Throttle/Pedal Position Sensor B Maximum Stop PerformanceCheck soonSensors & Electronics30–120 minutes for initial diagnosisP2164 relates to throttle/pedal position sensor b maximum stop performance. Check the fault conditions and vehicle-specific procedure before replacing parts.P2165Throttle/Pedal Position Sensor C Maximum Stop PerformanceCheck soonSensors & Electronics30–120 minutes for initial diagnosisP2165 relates to throttle/pedal position sensor c maximum stop performance. Check the fault conditions and vehicle-specific procedure before replacing parts.P2166Throttle/Pedal Position Sensor D Maximum Stop PerformanceCheck soonSensors & Electronics30–120 minutes for initial diagnosisP2166 relates to throttle/pedal position sensor d maximum stop performance. Check the fault conditions and vehicle-specific procedure before replacing parts.P2167Throttle/Pedal Position Sensor E Maximum Stop PerformanceCheck soonSensors & Electronics30–120 minutes for initial diagnosisP2167 relates to throttle/pedal position sensor e maximum stop performance. Check the fault conditions and vehicle-specific procedure before replacing parts.P2168Throttle/Pedal Position Sensor F Maximum Stop PerformanceCheck soonSensors & Electronics30–120 minutes for initial diagnosisP2168 relates to throttle/pedal position sensor f maximum stop performance. Check the fault conditions and vehicle-specific procedure before replacing parts.P2169Exhaust Pressure Regulator Vent Solenoid Control Circuit/OpenCheck soonSensors & Electronics30–120 minutes for initial diagnosisP2169 relates to exhaust pressure regulator vent solenoid control circuit/open. Check the fault conditions and vehicle-specific procedure before replacing parts.P216AFuel Injector Group E Supply Voltage Circuit/OpenCheck soonFuel System30–120 minutes for initial diagnosisP216A relates to fuel injector group e supply voltage circuit/open. Check the fault conditions and vehicle-specific procedure before replacing parts.P216BFuel Injector Group E Supply Voltage Circuit LowCheck soonFuel System30–120 minutes for initial diagnosisP216B relates to fuel injector group e supply voltage circuit low. Check the fault conditions and vehicle-specific procedure before replacing parts.P216CFuel Injector Group E Supply Voltage Circuit HighCheck soonFuel System30–120 minutes for initial diagnosisP216C relates to fuel injector group e supply voltage circuit high. Check the fault conditions and vehicle-specific procedure before replacing parts.P216DFuel Injector Group F Supply Voltage Circuit/OpenCheck soonFuel System30–120 minutes for initial diagnosisP216D relates to fuel injector group f supply voltage circuit/open. Check the fault conditions and vehicle-specific procedure before replacing parts.P216EFuel Injector Group F Supply Voltage Circuit LowCheck soonFuel System30–120 minutes for initial diagnosisP216E relates to fuel injector group f supply voltage circuit low. Check the fault conditions and vehicle-specific procedure before replacing parts.P216FFuel Injector Group F Supply Voltage Circuit HighCheck soonFuel System30–120 minutes for initial diagnosisP216F relates to fuel injector group f supply voltage circuit high. Check the fault conditions and vehicle-specific procedure before replacing parts.P2170Exhaust Pressure Regulator Vent Solenoid Control Circuit LowCheck soonSensors & Electronics30–120 minutes for initial diagnosisP2170 relates to exhaust pressure regulator vent solenoid control circuit low. Check the fault conditions and vehicle-specific procedure before replacing parts.