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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 7993–8016 of 8256

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U3521High Voltage System Interlock Circuit FCheck soonNetwork & Communication45–120 minutes for initial diagnosisU3521 concerns high voltage system interlock circuit f. Learn what this fault indicates and where to begin diagnosis.U3522High Voltage System Interlock Circuit F PerformanceCheck soonNetwork & Communication45–120 minutes for initial diagnosisU3522 concerns high voltage system interlock circuit f performance. Learn what this fault indicates and where to begin diagnosis.U3523High Voltage System Interlock Circuit F LowCheck soonNetwork & Communication45–120 minutes for initial diagnosisU3523 concerns high voltage system interlock circuit f low. Learn what this fault indicates and where to begin diagnosis.U3524High Voltage System Interlock Circuit F HighCheck soonNetwork & Communication45–120 minutes for initial diagnosisU3524 concerns high voltage system interlock circuit f high. Learn what this fault indicates and where to begin diagnosis.U3525High Voltage System Interlock Circuit GCheck soonNetwork & Communication45–120 minutes for initial diagnosisU3525 concerns high voltage system interlock circuit g. Learn what this fault indicates and where to begin diagnosis.U3526High Voltage System Interlock Circuit G PerformanceCheck soonNetwork & Communication45–120 minutes for initial diagnosisU3526 concerns high voltage system interlock circuit g performance. Learn what this fault indicates and where to begin diagnosis.U3527High Voltage System Interlock Circuit G LowCheck soonNetwork & Communication45–120 minutes for initial diagnosisU3527 concerns high voltage system interlock circuit g low. Learn what this fault indicates and where to begin diagnosis.U3528High Voltage System Interlock Circuit G HighCheck soonNetwork & Communication45–120 minutes for initial diagnosisU3528 concerns high voltage system interlock circuit g high. Learn what this fault indicates and where to begin diagnosis.U3529High Voltage System Interlock Circuit HCheck soonNetwork & Communication45–120 minutes for initial diagnosisU3529 concerns high voltage system interlock circuit h. Learn what this fault indicates and where to begin diagnosis.U352AHigh Voltage System Interlock Circuit H PerformanceCheck soonNetwork & Communication45–120 minutes for initial diagnosisU352A concerns high voltage system interlock circuit h performance. Learn what this fault indicates and where to begin diagnosis.U352BHigh Voltage System Interlock Circuit H LowCheck soonNetwork & Communication45–120 minutes for initial diagnosisU352B concerns high voltage system interlock circuit h low. Learn what this fault indicates and where to begin diagnosis.U352CHigh Voltage System Interlock Circuit H HighCheck soonNetwork & Communication45–120 minutes for initial diagnosisU352C concerns high voltage system interlock circuit h high. Learn what this fault indicates and where to begin diagnosis.U352DHigh Voltage System Interlock Circuit JCheck soonNetwork & Communication45–120 minutes for initial diagnosisU352D concerns high voltage system interlock circuit j. Learn what this fault indicates and where to begin diagnosis.U352EHigh Voltage System Interlock Circuit J PerformanceCheck soonNetwork & Communication45–120 minutes for initial diagnosisU352E concerns high voltage system interlock circuit j performance. Learn what this fault indicates and where to begin diagnosis.U352FHigh Voltage System Interlock Circuit J LowCheck soonNetwork & Communication45–120 minutes for initial diagnosisU352F concerns high voltage system interlock circuit j low. Learn what this fault indicates and where to begin diagnosis.U3530High Voltage System Interlock Circuit J HighCheck soonNetwork & Communication45–120 minutes for initial diagnosisU3530 concerns high voltage system interlock circuit j high. Learn what this fault indicates and where to begin diagnosis.U3531High Voltage System Interlock Circuit KCheck soonNetwork & Communication45–120 minutes for initial diagnosisU3531 concerns high voltage system interlock circuit k. Learn what this fault indicates and where to begin diagnosis.U3532High Voltage System Interlock Circuit K PerformanceCheck soonNetwork & Communication45–120 minutes for initial diagnosisU3532 concerns high voltage system interlock circuit k performance. Learn what this fault indicates and where to begin diagnosis.U3533High Voltage System Interlock Circuit K LowCheck soonNetwork & Communication45–120 minutes for initial diagnosisU3533 concerns high voltage system interlock circuit k low. Learn what this fault indicates and where to begin diagnosis.U3534High Voltage System Interlock Circuit K HighCheck soonNetwork & Communication45–120 minutes for initial diagnosisU3534 concerns high voltage system interlock circuit k high. Learn what this fault indicates and where to begin diagnosis.U3535High Voltage System Interlock Circuit LCheck soonNetwork & Communication45–120 minutes for initial diagnosisU3535 concerns high voltage system interlock circuit l. Learn what this fault indicates and where to begin diagnosis.U3536High Voltage System Interlock Circuit L PerformanceCheck soonNetwork & Communication45–120 minutes for initial diagnosisU3536 concerns high voltage system interlock circuit l performance. Learn what this fault indicates and where to begin diagnosis.U3537High Voltage System Interlock Circuit L LowCheck soonNetwork & Communication45–120 minutes for initial diagnosisU3537 concerns high voltage system interlock circuit l low. Learn what this fault indicates and where to begin diagnosis.U3538High Voltage System Interlock Circuit L HighCheck soonNetwork & Communication45–120 minutes for initial diagnosisU3538 concerns high voltage system interlock circuit l high. Learn what this fault indicates and where to begin diagnosis.