Diagnostic library

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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 9253

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P0455EVAP System Large Leak DetectedEmissions SystemDiagnose P0455 large EVAP leak code. Find out what causes large evaporative system leaks and how to repair.P0756Shift Solenoid B Performance or Stuck OffCheck soonTransmission Issues45–120 minutes for initial diagnosisP0756 means Shift Solenoid B Performance or Stuck Off. Learn the likely symptoms, causes, safety implications, and a practical diagnostic order.P0760Shift Solenoid C MalfunctionCheck soonTransmission Issues45–120 minutes for initial diagnosisP0760 means Shift Solenoid C Malfunction. Learn the likely symptoms, causes, safety implications, and a practical diagnostic order.U0001High Speed CAN Communication BusCheck soonNetwork & Communication45–120 minutes for initial diagnosisU0001 means High Speed CAN Communication Bus. Review likely symptoms, causes, safety considerations, and a sensible diagnostic order.U0100Lost Communication With ECM/PCM AUrgentNetwork & Communication1–3 hours for initial diagnosisU0100 means Lost Communication With ECM/PCM A. Review likely symptoms, causes, safety considerations, and a sensible diagnostic order.U0101Lost Communication With Transmission Control ModuleUrgentNetwork & Communication1–3 hours for initial diagnosisU0101 means Lost Communication With Transmission Control Module. Review likely symptoms, causes, safety considerations, and a sensible diagnostic order.U0121Lost Communication With Anti-Lock Brake System Control ModuleUrgentNetwork & Communication1–3 hours for initial diagnosisU0121 means Lost Communication With Anti-Lock Brake System Control Module. Review likely symptoms, causes, safety considerations, and a sensible diagnostic order.U0140Lost Communication With Body Control ModuleCheck soonNetwork & Communication45–120 minutes for initial diagnosisU0140 means Lost Communication With Body Control Module. Review likely symptoms, causes, safety considerations, and a sensible diagnostic order.B0003Driver Frontal Stage 3 Deployment ControlUrgentBody & Restraints45–120 minutes for initial diagnosisB0003 concerns driver frontal stage 3 deployment control. Learn what this fault indicates and where to begin diagnosis.B0004Driver Knee Bolster Deployment ControlUrgentBody & Restraints45–120 minutes for initial diagnosisB0004 concerns driver knee bolster deployment control. Learn what this fault indicates and where to begin diagnosis.B0005Collapsible Steering Column Deployment ControlUrgentBody & Restraints45–120 minutes for initial diagnosisB0005 concerns collapsible steering column deployment control. Learn what this fault indicates and where to begin diagnosis.B0012Driver Frontal Deployment Loop Stage 1UrgentBody & Restraints1–3 hours for initial diagnosisB0012 means Driver Frontal Deployment Loop Stage 1. Review likely symptoms, causes, safety considerations, and a sensible diagnostic order.B0013Driver Frontal Deployment Loop Stage 2UrgentBody & Restraints1–3 hours for initial diagnosisB0013 means Driver Frontal Deployment Loop Stage 2. Review likely symptoms, causes, safety considerations, and a sensible diagnostic order.B001ACenter Frontal Stage 3 Deployment ControlUrgentBody & Restraints45–120 minutes for initial diagnosisB001A concerns center frontal stage 3 deployment control. Learn what this fault indicates and where to begin diagnosis.B0029Right Curtain Deployment Control 1UrgentBody & Restraints45–120 minutes for initial diagnosisB0029 concerns right curtain deployment control 1. Learn what this fault indicates and where to begin diagnosis.B002ARight Curtain Deployment Control 2UrgentBody & Restraints45–120 minutes for initial diagnosisB002A concerns right curtain deployment control 2. Learn what this fault indicates and where to begin diagnosis.B0030Second Row Left Side Airbag Deployment ControlUrgentBody & Restraints45–120 minutes for initial diagnosisB0030 concerns second row left side airbag deployment control. Learn what this fault indicates and where to begin diagnosis.B0031Second Row Left Frontal Stage 1 Deployment ControlUrgentBody & Restraints45–120 minutes for initial diagnosisB0031 concerns second row left frontal stage 1 deployment control. Learn what this fault indicates and where to begin diagnosis.B0032Second Row Left Frontal Stage 2 Deployment ControlUrgentBody & Restraints45–120 minutes for initial diagnosisB0032 concerns second row left frontal stage 2 deployment control. Learn what this fault indicates and where to begin diagnosis.B0033Second Row Left Frontal Stage 3 Deployment ControlUrgentBody & Restraints45–120 minutes for initial diagnosisB0033 concerns second row left frontal stage 3 deployment control. Learn what this fault indicates and where to begin diagnosis.B0038Second Row Right Side Airbag Deployment ControlUrgentBody & Restraints45–120 minutes for initial diagnosisB0038 concerns second row right side airbag deployment control. Learn what this fault indicates and where to begin diagnosis.B0039Second Row Right Frontal Stage 1 Deployment ControlUrgentBody & Restraints45–120 minutes for initial diagnosisB0039 concerns second row right frontal stage 1 deployment control. Learn what this fault indicates and where to begin diagnosis.B003ASecond Row Right Frontal Stage 2 Deployment ControlUrgentBody & Restraints45–120 minutes for initial diagnosisB003A concerns second row right frontal stage 2 deployment control. Learn what this fault indicates and where to begin diagnosis.B003BSecond Row Right Frontal Stage 3 Deployment ControlUrgentBody & Restraints45–120 minutes for initial diagnosisB003B concerns second row right frontal stage 3 deployment control. Learn what this fault indicates and where to begin diagnosis.