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

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These are generic OBD2 definitions. Exact make, model, engine, and year compatibility will appear after vehicle-fitment data is added.

Diagnostic codes

Showing 193–216 of 1223

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U0187Lost Communication With Digital Disc Player/Changer Module ACheck soonNetwork & Communication45–120 minutes for initial diagnosisU0187 concerns lost communication with digital disc player/changer module a. Learn what this fault indicates and where to begin diagnosis.U0188Lost Communication With Digital Disc Player/Changer Module BCheck soonNetwork & Communication45–120 minutes for initial diagnosisU0188 concerns lost communication with digital disc player/changer module b. Learn what this fault indicates and where to begin diagnosis.U0189Lost Communication With Digital Disc Player/Changer Module CCheck soonNetwork & Communication45–120 minutes for initial diagnosisU0189 concerns lost communication with digital disc player/changer module c. Learn what this fault indicates and where to begin diagnosis.U018ALost Communication With Headlamp Leveling Control Module BCheck soonNetwork & Communication45–120 minutes for initial diagnosisU018A concerns lost communication with headlamp leveling control module b. Learn what this fault indicates and where to begin diagnosis.U0190Lost Communication With Digital Disc Player/Changer Module DCheck soonNetwork & Communication45–120 minutes for initial diagnosisU0190 concerns lost communication with digital disc player/changer module d. Learn what this fault indicates and where to begin diagnosis.U0191Lost Communication With TelevisionCheck soonNetwork & Communication45–120 minutes for initial diagnosisU0191 concerns lost communication with television. Learn what this fault indicates and where to begin diagnosis.U0192Lost Communication With Personal ComputerCheck soonNetwork & Communication45–120 minutes for initial diagnosisU0192 concerns lost communication with personal computer. Learn what this fault indicates and where to begin diagnosis.U0193Lost Communication With Digital Audio Control Module ACheck soonNetwork & Communication45–120 minutes for initial diagnosisU0193 concerns lost communication with digital audio control module a. Learn what this fault indicates and where to begin diagnosis.U0194Lost Communication With Digital Audio Control Module BCheck soonNetwork & Communication45–120 minutes for initial diagnosisU0194 concerns lost communication with digital audio control module b. Learn what this fault indicates and where to begin diagnosis.U0195Lost Communication With Subscription Entertainment Receiver ModuleCheck soonNetwork & Communication45–120 minutes for initial diagnosisU0195 concerns lost communication with subscription entertainment receiver module. Learn what this fault indicates and where to begin diagnosis.U0196Lost Communication With Entertainment Control Module - Rear ACheck soonNetwork & Communication45–120 minutes for initial diagnosisU0196 concerns lost communication with entertainment control module - rear a. Learn what this fault indicates and where to begin diagnosis.U0197Lost Communication With Telephone Control ModuleCheck soonNetwork & Communication45–120 minutes for initial diagnosisU0197 concerns lost communication with telephone control module. Learn what this fault indicates and where to begin diagnosis.U0198Lost Communication With Telematic Control ModuleCheck soonNetwork & Communication45–120 minutes for initial diagnosisU0198 concerns lost communication with telematic control module. Learn what this fault indicates and where to begin diagnosis.U0199Lost Communication With Door Control Module ACheck soonNetwork & Communication45–120 minutes for initial diagnosisU0199 concerns lost communication with door control module a. Learn what this fault indicates and where to begin diagnosis.U019ALost Communication With Tachograph ModuleCheck soonNetwork & Communication45–120 minutes for initial diagnosisU019A concerns lost communication with tachograph module. Learn what this fault indicates and where to begin diagnosis.U019BLost Communication With Battery Charger Control Module ACheck soonNetwork & Communication45–120 minutes for initial diagnosisU019B concerns lost communication with battery charger control module a. Learn what this fault indicates and where to begin diagnosis.U019CLost Communication With Glow Plug Control Module 2Check soonNetwork & Communication45–120 minutes for initial diagnosisU019C concerns lost communication with glow plug control module 2. Learn what this fault indicates and where to begin diagnosis.U019DLost Communication With Direct Ozone Reduction Catalyst Temperature SensorCheck soonNetwork & Communication45–120 minutes for initial diagnosisU019D concerns lost communication with direct ozone reduction catalyst temperature sensor. Learn what this fault indicates and where to begin diagnosis.U019ELost Communication With Transmission Range Control ModuleCheck soonNetwork & Communication45–120 minutes for initial diagnosisU019E concerns lost communication with transmission range control module. Learn what this fault indicates and where to begin diagnosis.U019FLost Communication With Engine Coolant Pump Control ModuleCheck soonNetwork & Communication45–120 minutes for initial diagnosisU019F concerns lost communication with engine coolant pump control module. Learn what this fault indicates and where to begin diagnosis.U01A0Lost Communication With Hybrid/EV Battery Interface Control Module ACheck soonNetwork & Communication45–120 minutes for initial diagnosisU01A0 concerns lost communication with hybrid/ev battery interface control module a. Learn what this fault indicates and where to begin diagnosis.U01A1Lost Communication With Hybrid/EV Battery Interface Control Module BCheck soonNetwork & Communication45–120 minutes for initial diagnosisU01A1 concerns lost communication with hybrid/ev battery interface control module b. Learn what this fault indicates and where to begin diagnosis.U01A2Lost Communication With Hybrid/EV Battery Interface Control Module CCheck soonNetwork & Communication45–120 minutes for initial diagnosisU01A2 concerns lost communication with hybrid/ev battery interface control module c. Learn what this fault indicates and where to begin diagnosis.U01A3Lost Communication With Hybrid/EV Battery Interface Control Module DCheck soonNetwork & Communication45–120 minutes for initial diagnosisU01A3 concerns lost communication with hybrid/ev battery interface control module d. Learn what this fault indicates and where to begin diagnosis.