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 7273–7296 of 8256

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U0290Lost Communication with Active Aerodynamic Feature Control Module DCheck soonNetwork & Communication45–120 minutes for initial diagnosisU0290 concerns lost communication with active aerodynamic feature control module d. Learn what this fault indicates and where to begin diagnosis.U0291Lost Communication With Gear Shift Control Module BCheck soonNetwork & Communication45–120 minutes for initial diagnosisU0291 concerns lost communication with gear shift control module b. Learn what this fault indicates and where to begin diagnosis.U0292Lost Communication With Drive Motor Control Module BCheck soonNetwork & Communication45–120 minutes for initial diagnosisU0292 concerns lost communication with drive motor control module b. Learn what this fault indicates and where to begin diagnosis.U0293Lost Communication With Hybrid/EV Powertrain Control ModuleCheck soonNetwork & Communication45–120 minutes for initial diagnosisU0293 concerns lost communication with hybrid/ev powertrain control module. Learn what this fault indicates and where to begin diagnosis.U0294Lost Communication With Powertrain Control Monitor ModuleCheck soonNetwork & Communication45–120 minutes for initial diagnosisU0294 concerns lost communication with powertrain control monitor module. Learn what this fault indicates and where to begin diagnosis.U0295Lost Communication With AC/AC Converter Control ModuleCheck soonNetwork & Communication45–120 minutes for initial diagnosisU0295 concerns lost communication with ac/ac converter control module. Learn what this fault indicates and where to begin diagnosis.U0296Lost Communication With AC/DC Converter Control Module ACheck soonNetwork & Communication45–120 minutes for initial diagnosisU0296 concerns lost communication with ac/dc converter control module a. Learn what this fault indicates and where to begin diagnosis.U0297Lost Communication With AC/DC Converter Control Module BCheck soonNetwork & Communication45–120 minutes for initial diagnosisU0297 concerns lost communication with ac/dc converter control module b. Learn what this fault indicates and where to begin diagnosis.U0298Lost Communication With DC/DC Converter Control Module ACheck soonNetwork & Communication45–120 minutes for initial diagnosisU0298 concerns lost communication with dc/dc converter control module a. Learn what this fault indicates and where to begin diagnosis.U0299Lost Communication With DC/DC Converter Control Module BCheck soonNetwork & Communication45–120 minutes for initial diagnosisU0299 concerns lost communication with dc/dc converter control module b. Learn what this fault indicates and where to begin diagnosis.U029ALost Communication With Hybrid/EV Battery Pack Sensor ModuleCheck soonNetwork & Communication45–120 minutes for initial diagnosisU029A concerns lost communication with hybrid/ev battery pack sensor module. Learn what this fault indicates and where to begin diagnosis.U029BLost Communication With Drive Motor Control Module CCheck soonNetwork & Communication45–120 minutes for initial diagnosisU029B concerns lost communication with drive motor control module c. Learn what this fault indicates and where to begin diagnosis.U029CLost Communication With Drive Motor Control Module DCheck soonNetwork & Communication45–120 minutes for initial diagnosisU029C concerns lost communication with drive motor control module d. Learn what this fault indicates and where to begin diagnosis.U029DLost Communication With NOx Sensor ACheck soonNetwork & Communication45–120 minutes for initial diagnosisU029D concerns lost communication with nox sensor a. Learn what this fault indicates and where to begin diagnosis.U029ELost Communication With NOx Sensor BCheck soonNetwork & Communication45–120 minutes for initial diagnosisU029E concerns lost communication with nox sensor b. Learn what this fault indicates and where to begin diagnosis.U029FLost Communication With Evaporative Emission System Leak Detection Control ModuleCheck soonNetwork & Communication45–120 minutes for initial diagnosisU029F concerns lost communication with evaporative emission system leak detection control module. Learn what this fault indicates and where to begin diagnosis.U02A0Invalid Data Received From Hybrid/EV Battery Interface Control Module DCheck soonNetwork & Communication45–120 minutes for initial diagnosisU02A0 concerns invalid data received from hybrid/ev battery interface control module d. Learn what this fault indicates and where to begin diagnosis.U02A1Lost Communication With NOx Sensor CCheck soonNetwork & Communication45–120 minutes for initial diagnosisU02A1 concerns lost communication with nox sensor c. Learn what this fault indicates and where to begin diagnosis.U02A2Lost Communication With Reductant Quality ModuleCheck soonNetwork & Communication45–120 minutes for initial diagnosisU02A2 concerns lost communication with reductant quality module. Learn what this fault indicates and where to begin diagnosis.U02A3Lost Communication With Particulate Matter SensorCheck soonNetwork & Communication45–120 minutes for initial diagnosisU02A3 concerns lost communication with particulate matter sensor. Learn what this fault indicates and where to begin diagnosis.U02A4Lost Communication With NH3 SensorCheck soonNetwork & Communication45–120 minutes for initial diagnosisU02A4 concerns lost communication with nh3 sensor. Learn what this fault indicates and where to begin diagnosis.U02A5Lost Communication With Reductant Heater Control ModuleCheck soonNetwork & Communication45–120 minutes for initial diagnosisU02A5 concerns lost communication with reductant heater control module. Learn what this fault indicates and where to begin diagnosis.U02A6Lost Communication With Safety Integration Control ModuleCheck soonNetwork & Communication45–120 minutes for initial diagnosisU02A6 concerns lost communication with safety integration control module. Learn what this fault indicates and where to begin diagnosis.U02A7Lost Communication With Engine Sound Control 1Check soonNetwork & Communication45–120 minutes for initial diagnosisU02A7 concerns lost communication with engine sound control 1. Learn what this fault indicates and where to begin diagnosis.