Diagnostic library

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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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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 25–48 of 8256

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B0071Passenger Presence SystemCheck soonBody & Restraints45–120 minutes for initial diagnosisB0071 means Passenger Presence System. Review likely symptoms, causes, safety considerations, and a sensible diagnostic order.B0099Roll Over SensorCheck soonBody & Restraints45–120 minutes for initial diagnosisB0099 concerns roll over sensor. Learn what this fault indicates and where to begin diagnosis.B00A0Occupant Classification SystemCheck soonBody & Restraints45–120 minutes for initial diagnosisB00A0 concerns occupant classification system. Learn what this fault indicates and where to begin diagnosis.B00A1Occupant Position SystemCheck soonBody & Restraints45–120 minutes for initial diagnosisB00A1 concerns occupant position system. Learn what this fault indicates and where to begin diagnosis.B00B0Driver Seat Occupant Classification Sensor ACheck soonBody & Restraints45–120 minutes for initial diagnosisB00B0 concerns driver seat occupant classification sensor a. Learn what this fault indicates and where to begin diagnosis.B00B1Driver Seat Occupant Classification Sensor BCheck soonBody & Restraints45–120 minutes for initial diagnosisB00B1 concerns driver seat occupant classification sensor b. Learn what this fault indicates and where to begin diagnosis.B00B2Driver Seat Occupant Classification Sensor CCheck soonBody & Restraints45–120 minutes for initial diagnosisB00B2 concerns driver seat occupant classification sensor c. Learn what this fault indicates and where to begin diagnosis.B00B3Driver Seat Occupant Classification Sensor DCheck soonBody & Restraints45–120 minutes for initial diagnosisB00B3 concerns driver seat occupant classification sensor d. Learn what this fault indicates and where to begin diagnosis.B00B4Driver Seat Occupant Classification Sensor ECheck soonBody & Restraints45–120 minutes for initial diagnosisB00B4 concerns driver seat occupant classification sensor e. Learn what this fault indicates and where to begin diagnosis.B00B7Driver Seat Occupant Position Sensor ACheck soonBody & Restraints45–120 minutes for initial diagnosisB00B7 concerns driver seat occupant position sensor a. Learn what this fault indicates and where to begin diagnosis.B00B8Driver Seat Occupant Position Sensor BCheck soonBody & Restraints45–120 minutes for initial diagnosisB00B8 concerns driver seat occupant position sensor b. Learn what this fault indicates and where to begin diagnosis.B00B9Driver Seat Occupant Position Sensor CCheck soonBody & Restraints45–120 minutes for initial diagnosisB00B9 concerns driver seat occupant position sensor c. Learn what this fault indicates and where to begin diagnosis.B00BADriver Seat Occupant Position Sensor DCheck soonBody & Restraints45–120 minutes for initial diagnosisB00BA concerns driver seat occupant position sensor d. Learn what this fault indicates and where to begin diagnosis.B00BBDriver Seat Occupant Position Sensor ECheck soonBody & Restraints45–120 minutes for initial diagnosisB00BB concerns driver seat occupant position sensor e. Learn what this fault indicates and where to begin diagnosis.B00C0Passenger Seat Occupant Classification Sensor ACheck soonBody & Restraints45–120 minutes for initial diagnosisB00C0 concerns passenger seat occupant classification sensor a. Learn what this fault indicates and where to begin diagnosis.B00C1Passenger Seat Occupant Classification Sensor BCheck soonBody & Restraints45–120 minutes for initial diagnosisB00C1 concerns passenger seat occupant classification sensor b. Learn what this fault indicates and where to begin diagnosis.B00C2Passenger Seat Occupant Classification Sensor CCheck soonBody & Restraints45–120 minutes for initial diagnosisB00C2 concerns passenger seat occupant classification sensor c. Learn what this fault indicates and where to begin diagnosis.B00C3Passenger Seat Occupant Classification Sensor DCheck soonBody & Restraints45–120 minutes for initial diagnosisB00C3 concerns passenger seat occupant classification sensor d. Learn what this fault indicates and where to begin diagnosis.B00C4Passenger Seat Occupant Classification Sensor ECheck soonBody & Restraints45–120 minutes for initial diagnosisB00C4 concerns passenger seat occupant classification sensor e. Learn what this fault indicates and where to begin diagnosis.B00C7Passenger Seat Occupant Position Sensor ACheck soonBody & Restraints45–120 minutes for initial diagnosisB00C7 concerns passenger seat occupant position sensor a. Learn what this fault indicates and where to begin diagnosis.B00C8Passenger Seat Occupant Position Sensor BCheck soonBody & Restraints45–120 minutes for initial diagnosisB00C8 concerns passenger seat occupant position sensor b. Learn what this fault indicates and where to begin diagnosis.B00C9Passenger Seat Occupant Position Sensor CCheck soonBody & Restraints45–120 minutes for initial diagnosisB00C9 concerns passenger seat occupant position sensor c. Learn what this fault indicates and where to begin diagnosis.B00CAPassenger Seat Occupant Position Sensor DCheck soonBody & Restraints45–120 minutes for initial diagnosisB00CA concerns passenger seat occupant position sensor d. Learn what this fault indicates and where to begin diagnosis.B00CBPassenger Seat Occupant Position Sensor ECheck soonBody & Restraints45–120 minutes for initial diagnosisB00CB concerns passenger seat occupant position sensor e. Learn what this fault indicates and where to begin diagnosis.