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.

Body & Restraints Check soon Clear all

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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 73–85 of 85

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B0124Night Vision CameraCheck soonBody & Restraints45–120 minutes for initial diagnosisB0124 concerns night vision camera. Learn what this fault indicates and where to begin diagnosis.B0125Night Vision Control ModuleCheck soonBody & Restraints45–120 minutes for initial diagnosisB0125 concerns night vision control module. Learn what this fault indicates and where to begin diagnosis.B0126Driver Monitoring CameraCheck soonBody & Restraints45–120 minutes for initial diagnosisB0126 concerns driver monitoring camera. Learn what this fault indicates and where to begin diagnosis.B0127DC/AC Converter A High Voltage Power Outlet “A” Circuit/OpenCheck soonBody & Restraints45–120 minutes for initial diagnosisB0127 concerns dc/ac converter a high voltage power outlet “a” circuit/open. Learn what this fault indicates and where to begin diagnosis.B0128DC/AC Converter A High Voltage Power Outlet “B” Circuit/OpenCheck soonBody & Restraints45–120 minutes for initial diagnosisB0128 concerns dc/ac converter a high voltage power outlet “b” circuit/open. Learn what this fault indicates and where to begin diagnosis.B0129DC/AC Converter A High Voltage Power Outlet “C” Circuit/OpenCheck soonBody & Restraints45–120 minutes for initial diagnosisB0129 concerns dc/ac converter a high voltage power outlet “c” circuit/open. Learn what this fault indicates and where to begin diagnosis.B012ADC/AC Converter A High Voltage Power Outlet “D” Circuit/OpenCheck soonBody & Restraints45–120 minutes for initial diagnosisB012A concerns dc/ac converter a high voltage power outlet “d” circuit/open. Learn what this fault indicates and where to begin diagnosis.B012BDC/AC Converter A High Voltage Power Outlet “E” Circuit/OpenCheck soonBody & Restraints45–120 minutes for initial diagnosisB012B concerns dc/ac converter a high voltage power outlet “e” circuit/open. Learn what this fault indicates and where to begin diagnosis.B012CDC/AC Converter A High Voltage Power Outlet Control Module “A”Check soonBody & Restraints45–120 minutes for initial diagnosisB012C concerns dc/ac converter a high voltage power outlet control module “a”. Learn what this fault indicates and where to begin diagnosis.B012DDC/AC Converter A High Voltage Power Outlet Control Module “B”Check soonBody & Restraints45–120 minutes for initial diagnosisB012D concerns dc/ac converter a high voltage power outlet control module “b”. Learn what this fault indicates and where to begin diagnosis.B012EDC/AC Converter A High Voltage Power Outlet Control Module “C”Check soonBody & Restraints45–120 minutes for initial diagnosisB012E concerns dc/ac converter a high voltage power outlet control module “c”. Learn what this fault indicates and where to begin diagnosis.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.