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.

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 7705–7728 of 8256

Most searched first

U0594Invalid Data Received From Hybrid/EV Powertrain Control ModuleCheck soonNetwork & Communication45–120 minutes for initial diagnosisU0594 concerns invalid data received from hybrid/ev powertrain control module. Learn what this fault indicates and where to begin diagnosis.U0595Invalid Data Received From Powertrain Control Monitor ModuleCheck soonNetwork & Communication45–120 minutes for initial diagnosisU0595 concerns invalid data received from powertrain control monitor module. Learn what this fault indicates and where to begin diagnosis.U0596Invalid Data Received From AC/AC Converter Control ModuleCheck soonNetwork & Communication45–120 minutes for initial diagnosisU0596 concerns invalid data received from ac/ac converter control module. Learn what this fault indicates and where to begin diagnosis.U0597Invalid Data Received From AC/DC Converter Control Module ACheck soonNetwork & Communication45–120 minutes for initial diagnosisU0597 concerns invalid data received from ac/dc converter control module a. Learn what this fault indicates and where to begin diagnosis.U0598Invalid Data Received From AC/DC Converter Control Module BCheck soonNetwork & Communication45–120 minutes for initial diagnosisU0598 concerns invalid data received from ac/dc converter control module b. Learn what this fault indicates and where to begin diagnosis.U0599Invalid Data Received From DC/DC Converter Control Module ACheck soonNetwork & Communication45–120 minutes for initial diagnosisU0599 concerns invalid data received from dc/dc converter control module a. Learn what this fault indicates and where to begin diagnosis.U059AInvalid Data Received From DC/DC Converter Control Module BCheck soonNetwork & Communication45–120 minutes for initial diagnosisU059A concerns invalid data received from dc/dc converter control module b. Learn what this fault indicates and where to begin diagnosis.U059BInvalid Data Received From Hybrid/EV Battery Pack Sensor ModuleCheck soonNetwork & Communication45–120 minutes for initial diagnosisU059B concerns invalid data received from hybrid/ev battery pack sensor module. Learn what this fault indicates and where to begin diagnosis.U059CInvalid Data Received From Drive Motor Control Module CCheck soonNetwork & Communication45–120 minutes for initial diagnosisU059C concerns invalid data received from drive motor control module c. Learn what this fault indicates and where to begin diagnosis.U059DInvalid Data Received From Drive Motor Control Module DCheck soonNetwork & Communication45–120 minutes for initial diagnosisU059D concerns invalid data received from drive motor control module d. Learn what this fault indicates and where to begin diagnosis.U059EInvalid Data Received From NOx Sensor ACheck soonNetwork & Communication45–120 minutes for initial diagnosisU059E concerns invalid data received from nox sensor a. Learn what this fault indicates and where to begin diagnosis.U059FInvalid Data Received From NOx Sensor BCheck soonNetwork & Communication45–120 minutes for initial diagnosisU059F concerns invalid data received from nox sensor b. Learn what this fault indicates and where to begin diagnosis.U05A0Invalid Data Received from Evaporative Emission System Leak Detection Control ModuleCheck soonNetwork & Communication45–120 minutes for initial diagnosisU05A0 concerns invalid data received from evaporative emission system leak detection control module. Learn what this fault indicates and where to begin diagnosis.U05A1NOx Sensor A Received Invalid Data From ECM/PCMCheck soonNetwork & Communication45–120 minutes for initial diagnosisU05A1 concerns nox sensor a received invalid data from ecm/pcm. Learn what this fault indicates and where to begin diagnosis.U05A2NOx Sensor B Received Invalid Data From ECM/PCMCheck soonNetwork & Communication45–120 minutes for initial diagnosisU05A2 concerns nox sensor b received invalid data from ecm/pcm. Learn what this fault indicates and where to begin diagnosis.U05A3Invalid Data Received From Reductant Quality ModuleCheck soonNetwork & Communication45–120 minutes for initial diagnosisU05A3 concerns invalid data received from reductant quality module. Learn what this fault indicates and where to begin diagnosis.U05A4Particulate Matter Sensor Received Invalid Data From ECM/PCMCheck soonNetwork & Communication45–120 minutes for initial diagnosisU05A4 concerns particulate matter sensor received invalid data from ecm/pcm. Learn what this fault indicates and where to begin diagnosis.U05A5Invalid Data Received From NH3 SensorCheck soonNetwork & Communication45–120 minutes for initial diagnosisU05A5 concerns invalid data received from nh3 sensor. Learn what this fault indicates and where to begin diagnosis.U05A6Invalid Data Received from Reductant Heater Control ModuleCheck soonNetwork & Communication45–120 minutes for initial diagnosisU05A6 concerns invalid data received from reductant heater control module. Learn what this fault indicates and where to begin diagnosis.U05A7Invalid Data Received From Safety Integration Control ModuleCheck soonNetwork & Communication45–120 minutes for initial diagnosisU05A7 concerns invalid data received from safety integration control module. Learn what this fault indicates and where to begin diagnosis.U05A8Invalid Data Received From NOx Sensor CCheck soonNetwork & Communication45–120 minutes for initial diagnosisU05A8 concerns invalid data received from nox sensor c. Learn what this fault indicates and where to begin diagnosis.U05A9NOx Sensor C Received Invalid Data From ECM/PCMCheck soonNetwork & Communication45–120 minutes for initial diagnosisU05A9 concerns nox sensor c received invalid data from ecm/pcm. Learn what this fault indicates and where to begin diagnosis.U05AAInvalid Data Received From Charge Air Cooler Coolant PumpCheck soonNetwork & Communication45–120 minutes for initial diagnosisU05AA concerns invalid data received from charge air cooler coolant pump. Learn what this fault indicates and where to begin diagnosis.U05ABInvalid Data Received From Engine Disconnect ClutchCheck soonNetwork & Communication45–120 minutes for initial diagnosisU05AB concerns invalid data received from engine disconnect clutch. Learn what this fault indicates and where to begin diagnosis.