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

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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.

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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 9001–9024 of 9253

Most searched first

B0016Left Roof Rail Deployment LoopUrgentBody & Restraints1–3 hours for initial diagnosisB0016 means Left Roof Rail Deployment Loop. Review likely symptoms, causes, safety considerations, and a sensible diagnostic order.B0017Passenger Frontal Deployment Loop Stage 1UrgentBody & Restraints1–3 hours for initial diagnosisB0017 means Passenger Frontal Deployment Loop Stage 1. Review likely symptoms, causes, safety considerations, and a sensible diagnostic order.B0018Passenger Frontal Deployment Loop Stage 2UrgentBody & Restraints1–3 hours for initial diagnosisB0018 means Passenger Frontal Deployment Loop Stage 2. Review likely symptoms, causes, safety considerations, and a sensible diagnostic order.B0019Passenger Instrument Panel Air Bag Deployment Loop Stage 1UrgentBody & Restraints1–3 hours for initial diagnosisB0019 means Passenger Instrument Panel Air Bag Deployment Loop Stage 1. Review likely symptoms, causes, safety considerations, and a sensible diagnostic order.B0020Passenger Instrument Panel Air Bag Deployment Loop Stage 2UrgentBody & Restraints1–3 hours for initial diagnosisB0020 means Passenger Instrument Panel Air Bag Deployment Loop Stage 2. Review likely symptoms, causes, safety considerations, and a sensible diagnostic order.B0021Left Curtain Air Bag Deployment ControlUrgentBody & Restraints1–3 hours for initial diagnosisB0021 means Left Curtain Air Bag Deployment Control. Review likely symptoms, causes, safety considerations, and a sensible diagnostic order.B0022Right Curtain Air Bag Deployment ControlUrgentBody & Restraints1–3 hours for initial diagnosisB0022 means Right Curtain Air Bag Deployment Control. Review likely symptoms, causes, safety considerations, and a sensible diagnostic order.B0028Passenger Side Deployment LoopUrgentBody & Restraints1–3 hours for initial diagnosisB0028 means Passenger Side Deployment Loop. Review likely symptoms, causes, safety considerations, and a sensible diagnostic order.B0051Deployment CommandedUrgentBody & Restraints1–3 hours for initial diagnosisB0051 means Deployment Commanded. Review likely symptoms, causes, safety considerations, and a sensible diagnostic order.B0081Passenger Presence System 1Check soonBody & Restraints45–120 minutes for initial diagnosisB0081 means Passenger Presence System 1. Review likely symptoms, causes, safety considerations, and a sensible diagnostic order.B0092Passenger Presence System 2Check soonBody & Restraints45–120 minutes for initial diagnosisB0092 means Passenger Presence System 2. Review likely symptoms, causes, safety considerations, and a sensible diagnostic order.C0052Steering Wheel Position Sensor Signal ACheck soonChassis & Brakes45–120 minutes for initial diagnosisC0052 means Steering Wheel Position Sensor Signal A. Review likely symptoms, causes, safety considerations, and a sensible diagnostic order.C0053Steering Wheel Position Sensor Signal BCheck soonChassis & Brakes45–120 minutes for initial diagnosisC0053 means Steering Wheel Position Sensor Signal B. Review likely symptoms, causes, safety considerations, and a sensible diagnostic order.C0054Steering Wheel Position Sensor Signal CCheck soonChassis & Brakes45–120 minutes for initial diagnosisC0054 means Steering Wheel Position Sensor Signal C. Review likely symptoms, causes, safety considerations, and a sensible diagnostic order.C0061Lateral Acceleration SensorCheck soonChassis & Brakes45–120 minutes for initial diagnosisC0061 means Lateral Acceleration Sensor. Review likely symptoms, causes, safety considerations, and a sensible diagnostic order.C0062Longitudinal Acceleration SensorCheck soonChassis & Brakes45–120 minutes for initial diagnosisC0062 means Longitudinal Acceleration Sensor. Review likely symptoms, causes, safety considerations, and a sensible diagnostic order.C0064Roll Rate SensorCheck soonChassis & Brakes45–120 minutes for initial diagnosisC0064 means Roll Rate Sensor. Review likely symptoms, causes, safety considerations, and a sensible diagnostic order.C00712WD/4WD SwitchCheck soonChassis & Brakes45–120 minutes for initial diagnosisC0071 means 2WD/4WD Switch. Review likely symptoms, causes, safety considerations, and a sensible diagnostic order.C0072Brake Temperature Too HighUrgentChassis & Brakes1–3 hours for initial diagnosisC0072 means Brake Temperature Too High. Review likely symptoms, causes, safety considerations, and a sensible diagnostic order.C0073Delivered Driving TorqueCheck soonChassis & Brakes45–120 minutes for initial diagnosisC0073 means Delivered Driving Torque. Review likely symptoms, causes, safety considerations, and a sensible diagnostic order.C0074Requested Driving TorqueCheck soonChassis & Brakes45–120 minutes for initial diagnosisC0074 means Requested Driving Torque. Review likely symptoms, causes, safety considerations, and a sensible diagnostic order.C0075Extended Brake Pedal TravelCheck soonChassis & Brakes45–120 minutes for initial diagnosisC0075 means Extended Brake Pedal Travel. Review likely symptoms, causes, safety considerations, and a sensible diagnostic order.C0081ABS Malfunction IndicatorCheck soonChassis & Brakes45–120 minutes for initial diagnosisC0081 means ABS Malfunction Indicator. Review likely symptoms, causes, safety considerations, and a sensible diagnostic order.P0001Fuel Volume Regulator Control Circuit/OpenCheck soonFuel System45–120 minutes for initial diagnosisP0001 means Fuel Volume Regulator Control Circuit/Open. Learn the likely symptoms, common causes, and a safe diagnostic order before replacing parts.