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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.

Check soon U · Network Clear all

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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 961–984 of 1223

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U0679Lost Communication With Transmission Fluid Pressure Sensor/Switch ACheck soonNetwork & Communication45–120 minutes for initial diagnosisU0679 concerns lost communication with transmission fluid pressure sensor/switch a. Learn what this fault indicates and where to begin diagnosis.U067ALost Communication With Transmission Fluid Pressure Sensor/Switch BCheck soonNetwork & Communication45–120 minutes for initial diagnosisU067A concerns lost communication with transmission fluid pressure sensor/switch b. Learn what this fault indicates and where to begin diagnosis.U067BLost Communication With Engine Disconnect Clutch Pressure SensorCheck soonNetwork & Communication45–120 minutes for initial diagnosisU067B concerns lost communication with engine disconnect clutch pressure sensor. Learn what this fault indicates and where to begin diagnosis.U067CLost Communication With Fan 3Check soonNetwork & Communication45–120 minutes for initial diagnosisU067C concerns lost communication with fan 3. Learn what this fault indicates and where to begin diagnosis.U067DLost Communication With Fan 4Check soonNetwork & Communication45–120 minutes for initial diagnosisU067D concerns lost communication with fan 4. Learn what this fault indicates and where to begin diagnosis.U067ELost Communication With Exhaust Pressure Control Valve B Sensor/SwitchCheck soonNetwork & Communication45–120 minutes for initial diagnosisU067E concerns lost communication with exhaust pressure control valve b sensor/switch. Learn what this fault indicates and where to begin diagnosis.U067FLost Communication With Barometric Pressure Sensor ACheck soonNetwork & Communication45–120 minutes for initial diagnosisU067F concerns lost communication with barometric pressure sensor a. Learn what this fault indicates and where to begin diagnosis.U0680Lost Communication With Barometric Pressure Sensor BCheck soonNetwork & Communication45–120 minutes for initial diagnosisU0680 concerns lost communication with barometric pressure sensor b. Learn what this fault indicates and where to begin diagnosis.U0681Lost Communication With Throttle/Pedal Position Sensor/Switch DCheck soonNetwork & Communication45–120 minutes for initial diagnosisU0681 concerns lost communication with throttle/pedal position sensor/switch d. Learn what this fault indicates and where to begin diagnosis.U0682Lost Communication With Throttle/Pedal Position Sensor/Switch ECheck soonNetwork & Communication45–120 minutes for initial diagnosisU0682 concerns lost communication with throttle/pedal position sensor/switch e. Learn what this fault indicates and where to begin diagnosis.U0683Lost Communication With Throttle/Pedal Position Sensor/Switch FCheck soonNetwork & Communication45–120 minutes for initial diagnosisU0683 concerns lost communication with throttle/pedal position sensor/switch f. Learn what this fault indicates and where to begin diagnosis.U0684Lost Communication With Catalyst Temperature Bank 1 Sensor 1Check soonNetwork & Communication45–120 minutes for initial diagnosisU0684 concerns lost communication with catalyst temperature bank 1 sensor 1. Learn what this fault indicates and where to begin diagnosis.U0685Lost Communication With Catalyst Temperature Bank 1 Sensor 2Check soonNetwork & Communication45–120 minutes for initial diagnosisU0685 concerns lost communication with catalyst temperature bank 1 sensor 2. Learn what this fault indicates and where to begin diagnosis.U0686Lost Communication With Catalyst Temperature Bank 2 Sensor 1Check soonNetwork & Communication45–120 minutes for initial diagnosisU0686 concerns lost communication with catalyst temperature bank 2 sensor 1. Learn what this fault indicates and where to begin diagnosis.U0687Lost Communication With Catalyst Temperature Bank 2 Sensor 2Check soonNetwork & Communication45–120 minutes for initial diagnosisU0687 concerns lost communication with catalyst temperature bank 2 sensor 2. Learn what this fault indicates and where to begin diagnosis.U0688Lost Communication With Throttle Position Sensor/Switch GCheck soonNetwork & Communication45–120 minutes for initial diagnosisU0688 concerns lost communication with throttle position sensor/switch g. Learn what this fault indicates and where to begin diagnosis.U0689Lost Communication With Turbocharger/Supercharger B Temperature SensorCheck soonNetwork & Communication45–120 minutes for initial diagnosisU0689 concerns lost communication with turbocharger/supercharger b temperature sensor. Learn what this fault indicates and where to begin diagnosis.U068ALost Communication With Barometric Pressure Sensor CCheck soonNetwork & Communication45–120 minutes for initial diagnosisU068A concerns lost communication with barometric pressure sensor c. Learn what this fault indicates and where to begin diagnosis.U068BLost Communication With Turbocharger/Supercharger Inlet Pressure Sensor ACheck soonNetwork & Communication45–120 minutes for initial diagnosisU068B concerns lost communication with turbocharger/supercharger inlet pressure sensor a. Learn what this fault indicates and where to begin diagnosis.U068CLost Communication With Turbocharger/Supercharger Inlet Pressure Sensor BCheck soonNetwork & Communication45–120 minutes for initial diagnosisU068C concerns lost communication with turbocharger/supercharger inlet pressure sensor b. Learn what this fault indicates and where to begin diagnosis.U068DLost Communication With EGR Temperature Sensor ACheck soonNetwork & Communication45–120 minutes for initial diagnosisU068D concerns lost communication with egr temperature sensor a. Learn what this fault indicates and where to begin diagnosis.U068ELost Communication With EGR Temperature Sensor BCheck soonNetwork & Communication45–120 minutes for initial diagnosisU068E concerns lost communication with egr temperature sensor b. Learn what this fault indicates and where to begin diagnosis.U068FLost Communication With EGR Temperature Sensor CCheck soonNetwork & Communication45–120 minutes for initial diagnosisU068F concerns lost communication with egr temperature sensor c. Learn what this fault indicates and where to begin diagnosis.U0690Lost Communication With EGR Temperature Sensor DCheck soonNetwork & Communication45–120 minutes for initial diagnosisU0690 concerns lost communication with egr temperature sensor d. Learn what this fault indicates and where to begin diagnosis.