Diagnostic library

Find an OBD2 code

Search the code from your scanner, then narrow the library by system, severity, or code family.

9,253 diagnostic guides

Sort

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.

Network & Communication Check soon Clear all

Quick browse

Choose a vehicle system

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 337–360 of 1223

Most searched first

U0269Lost Communication With Image Processing Sensor ECheck soonNetwork & Communication45–120 minutes for initial diagnosisU0269 concerns lost communication with image processing sensor e. Learn what this fault indicates and where to begin diagnosis.U026ALost Communication With Image Processing Sensor FCheck soonNetwork & Communication45–120 minutes for initial diagnosisU026A concerns lost communication with image processing sensor f. Learn what this fault indicates and where to begin diagnosis.U026BLost Communication With Image Processing Sensor GCheck soonNetwork & Communication45–120 minutes for initial diagnosisU026B concerns lost communication with image processing sensor g. Learn what this fault indicates and where to begin diagnosis.U026CLost Communication With Image Processing Sensor HCheck soonNetwork & Communication45–120 minutes for initial diagnosisU026C concerns lost communication with image processing sensor h. Learn what this fault indicates and where to begin diagnosis.U026DLost Communication With Image Processing Sensor ICheck soonNetwork & Communication45–120 minutes for initial diagnosisU026D concerns lost communication with image processing sensor i. Learn what this fault indicates and where to begin diagnosis.U026ELost Communication With Image Processing Sensor JCheck soonNetwork & Communication45–120 minutes for initial diagnosisU026E concerns lost communication with image processing sensor j. Learn what this fault indicates and where to begin diagnosis.U026FLost Communication With Image Processing Sensor KCheck soonNetwork & Communication45–120 minutes for initial diagnosisU026F concerns lost communication with image processing sensor k. Learn what this fault indicates and where to begin diagnosis.U0270Lost Communication With Image Processing Sensor LCheck soonNetwork & Communication45–120 minutes for initial diagnosisU0270 concerns lost communication with image processing sensor l. Learn what this fault indicates and where to begin diagnosis.U0271Lost Communication With Seat Control Switch Module CCheck soonNetwork & Communication45–120 minutes for initial diagnosisU0271 concerns lost communication with seat control switch module c. Learn what this fault indicates and where to begin diagnosis.U0272Lost Communication With Seat Control Switch Module DCheck soonNetwork & Communication45–120 minutes for initial diagnosisU0272 concerns lost communication with seat control switch module d. Learn what this fault indicates and where to begin diagnosis.U0273Lost Communication With Lighting Driver Control Module “A”Check soonNetwork & Communication45–120 minutes for initial diagnosisU0273 concerns lost communication with lighting driver control module “a”. Learn what this fault indicates and where to begin diagnosis.U0274Lost Communication With Lighting Driver Control Module “B”Check soonNetwork & Communication45–120 minutes for initial diagnosisU0274 concerns lost communication with lighting driver control module “b”. Learn what this fault indicates and where to begin diagnosis.U0275Lost Communication With Lighting Driver Control Module “C”Check soonNetwork & Communication45–120 minutes for initial diagnosisU0275 concerns lost communication with lighting driver control module “c”. Learn what this fault indicates and where to begin diagnosis.U0276Lost Communication With Lighting Driver Control Module “D”Check soonNetwork & Communication45–120 minutes for initial diagnosisU0276 concerns lost communication with lighting driver control module “d”. Learn what this fault indicates and where to begin diagnosis.U0277Lost Communication With Seat Control Module KCheck soonNetwork & Communication45–120 minutes for initial diagnosisU0277 concerns lost communication with seat control module k. Learn what this fault indicates and where to begin diagnosis.U0278Lost Communication With Seat Control Module LCheck soonNetwork & Communication45–120 minutes for initial diagnosisU0278 concerns lost communication with seat control module l. Learn what this fault indicates and where to begin diagnosis.U0279Lost Communication with Haptic Control ModuleCheck soonNetwork & Communication45–120 minutes for initial diagnosisU0279 concerns lost communication with haptic control module. Learn what this fault indicates and where to begin diagnosis.U027ALost Communication With Battery Charger Control Module CCheck soonNetwork & Communication45–120 minutes for initial diagnosisU027A concerns lost communication with battery charger control module c. Learn what this fault indicates and where to begin diagnosis.U027BLost Communication with Battery Charger Control Module DCheck soonNetwork & Communication45–120 minutes for initial diagnosisU027B concerns lost communication with battery charger control module d. Learn what this fault indicates and where to begin diagnosis.U027CLost Communication With Off-Board Charger Control ModuleCheck soonNetwork & Communication45–120 minutes for initial diagnosisU027C concerns lost communication with off-board charger control module. Learn what this fault indicates and where to begin diagnosis.U0284Lost Communication With Active Grille Air Shutter Module ACheck soonNetwork & Communication45–120 minutes for initial diagnosisU0284 concerns lost communication with active grille air shutter module a. Learn what this fault indicates and where to begin diagnosis.U0285Lost Communication With Active Grille Air Shutter Module BCheck soonNetwork & Communication45–120 minutes for initial diagnosisU0285 concerns lost communication with active grille air shutter module b. Learn what this fault indicates and where to begin diagnosis.U0286Lost Communication With Radiator Anti Tamper DeviceCheck soonNetwork & Communication45–120 minutes for initial diagnosisU0286 concerns lost communication with radiator anti tamper device. Learn what this fault indicates and where to begin diagnosis.U0287Lost Communication With Transmission Fluid Pump Module ACheck soonNetwork & Communication45–120 minutes for initial diagnosisU0287 concerns lost communication with transmission fluid pump module a. Learn what this fault indicates and where to begin diagnosis.