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 289–312 of 1223

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U0238Lost Communication With Digital Audio Control Module DCheck soonNetwork & Communication45–120 minutes for initial diagnosisU0238 concerns lost communication with digital audio control module d. Learn what this fault indicates and where to begin diagnosis.U0239Lost Communication With Entrapment Control Module ACheck soonNetwork & Communication45–120 minutes for initial diagnosisU0239 concerns lost communication with entrapment control module a. Learn what this fault indicates and where to begin diagnosis.U023ALost Communication With Image Processing Module ACheck soonNetwork & Communication45–120 minutes for initial diagnosisU023A concerns lost communication with image processing module a. Learn what this fault indicates and where to begin diagnosis.U023BLost Communication With Image Processing Module BCheck soonNetwork & Communication45–120 minutes for initial diagnosisU023B concerns lost communication with image processing module b. Learn what this fault indicates and where to begin diagnosis.U023CLost Communication With Image Processing Module CCheck soonNetwork & Communication45–120 minutes for initial diagnosisU023C concerns lost communication with image processing module c. Learn what this fault indicates and where to begin diagnosis.U023DLost Communication With Front Distance Range Sensor - LeftCheck soonNetwork & Communication45–120 minutes for initial diagnosisU023D concerns lost communication with front distance range sensor - left. Learn what this fault indicates and where to begin diagnosis.U023ELost Communication With Front Distance Range Sensor - RightCheck soonNetwork & Communication45–120 minutes for initial diagnosisU023E concerns lost communication with front distance range sensor - right. Learn what this fault indicates and where to begin diagnosis.U0240Lost Communication With Entrapment Control Module BCheck soonNetwork & Communication45–120 minutes for initial diagnosisU0240 concerns lost communication with entrapment control module b. Learn what this fault indicates and where to begin diagnosis.U0241Lost Communication With Headlamp Control Module ACheck soonNetwork & Communication45–120 minutes for initial diagnosisU0241 concerns lost communication with headlamp control module a. Learn what this fault indicates and where to begin diagnosis.U0242Lost Communication With Headlamp Control Module BCheck soonNetwork & Communication45–120 minutes for initial diagnosisU0242 concerns lost communication with headlamp control module b. Learn what this fault indicates and where to begin diagnosis.U0243Lost Communication With Parking Assist Control Module BCheck soonNetwork & Communication45–120 minutes for initial diagnosisU0243 concerns lost communication with parking assist control module b. Learn what this fault indicates and where to begin diagnosis.U0244Lost Communication With Running Board Control Module ACheck soonNetwork & Communication45–120 minutes for initial diagnosisU0244 concerns lost communication with running board control module a. Learn what this fault indicates and where to begin diagnosis.U0245Lost Communication With Entertainment Control Module - FrontCheck soonNetwork & Communication45–120 minutes for initial diagnosisU0245 concerns lost communication with entertainment control module - front. Learn what this fault indicates and where to begin diagnosis.U0246Lost Communication With Seat Control Module ECheck soonNetwork & Communication45–120 minutes for initial diagnosisU0246 concerns lost communication with seat control module e. Learn what this fault indicates and where to begin diagnosis.U0247Lost Communication With Seat Control Module FCheck soonNetwork & Communication45–120 minutes for initial diagnosisU0247 concerns lost communication with seat control module f. Learn what this fault indicates and where to begin diagnosis.U0248Lost Communication With Remote Accessory ModuleCheck soonNetwork & Communication45–120 minutes for initial diagnosisU0248 concerns lost communication with remote accessory module. Learn what this fault indicates and where to begin diagnosis.U0249Lost Communication With Entertainment Control Module - Rear BCheck soonNetwork & Communication45–120 minutes for initial diagnosisU0249 concerns lost communication with entertainment control module - rear b. Learn what this fault indicates and where to begin diagnosis.U024ALost Communication With Interior Lighting Control Module ACheck soonNetwork & Communication45–120 minutes for initial diagnosisU024A concerns lost communication with interior lighting control module a. Learn what this fault indicates and where to begin diagnosis.U024BLost Communication With Seat Control Module GCheck soonNetwork & Communication45–120 minutes for initial diagnosisU024B concerns lost communication with seat control module g. Learn what this fault indicates and where to begin diagnosis.U024CLost Communication With Seat Control Module HCheck soonNetwork & Communication45–120 minutes for initial diagnosisU024C concerns lost communication with seat control module h. Learn what this fault indicates and where to begin diagnosis.U024DLost Communication With Seat Control Module JCheck soonNetwork & Communication45–120 minutes for initial diagnosisU024D concerns lost communication with seat control module j. Learn what this fault indicates and where to begin diagnosis.U024ELost Communication With Side Obstacle Detection Control Module CCheck soonNetwork & Communication45–120 minutes for initial diagnosisU024E concerns lost communication with side obstacle detection control module c. Learn what this fault indicates and where to begin diagnosis.U024FLost Communication With Side Obstacle Detection Control Module DCheck soonNetwork & Communication45–120 minutes for initial diagnosisU024F concerns lost communication with side obstacle detection control module d. Learn what this fault indicates and where to begin diagnosis.U0250Lost Communication With Impact Classification System ModuleCheck soonNetwork & Communication45–120 minutes for initial diagnosisU0250 concerns lost communication with impact classification system module. Learn what this fault indicates and where to begin diagnosis.