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

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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 8233–8256 of 8256

Most searched first

U0122Lost Communication With Vehicle Dynamics Control ModuleCheck soonNetwork & Communication45–120 minutes for initial diagnosisU0122 means Lost Communication With Vehicle Dynamics Control Module. Review likely symptoms, causes, safety considerations, and a sensible diagnostic order.U0123Lost Communication With Yaw Rate Sensor ModuleCheck soonNetwork & Communication45–120 minutes for initial diagnosisU0123 means Lost Communication With Yaw Rate Sensor Module. Review likely symptoms, causes, safety considerations, and a sensible diagnostic order.U0124Lost Communication With Lateral Acceleration Sensor ModuleCheck soonNetwork & Communication45–120 minutes for initial diagnosisU0124 means Lost Communication With Lateral Acceleration Sensor Module. Review likely symptoms, causes, safety considerations, and a sensible diagnostic order.U0125Lost Communication With Multi-Axis Acceleration Sensor ModuleCheck soonNetwork & Communication45–120 minutes for initial diagnosisU0125 means Lost Communication With Multi-Axis Acceleration Sensor Module. Review likely symptoms, causes, safety considerations, and a sensible diagnostic order.U0126Lost Communication With Steering Angle Sensor ModuleCheck soonNetwork & Communication45–120 minutes for initial diagnosisU0126 means Lost Communication With Steering Angle Sensor Module. Review likely symptoms, causes, safety considerations, and a sensible diagnostic order.U0128Lost Communication With Park Brake Control ModuleCheck soonNetwork & Communication45–120 minutes for initial diagnosisU0128 means Lost Communication With Park Brake Control Module. Review likely symptoms, causes, safety considerations, and a sensible diagnostic order.U0130Lost Communication With Steering Effort Control ModuleCheck soonNetwork & Communication45–120 minutes for initial diagnosisU0130 means Lost Communication With Steering Effort Control Module. Review likely symptoms, causes, safety considerations, and a sensible diagnostic order.U0132Lost Communication With Ride Level Control ModuleCheck soonNetwork & Communication45–120 minutes for initial diagnosisU0132 means Lost Communication With Ride Level Control Module. Review likely symptoms, causes, safety considerations, and a sensible diagnostic order.U0133Lost Communication With Active Roll Control ModuleCheck soonNetwork & Communication45–120 minutes for initial diagnosisU0133 means Lost Communication With Active Roll Control Module. Review likely symptoms, causes, safety considerations, and a sensible diagnostic order.U0134Lost Communication With Rear Power Steering Control ModuleCheck soonNetwork & Communication45–120 minutes for initial diagnosisU0134 means Lost Communication With Rear Power Steering Control Module. Review likely symptoms, causes, safety considerations, and a sensible diagnostic order.U0135Lost Communication With Front Differential Control ModuleCheck soonNetwork & Communication45–120 minutes for initial diagnosisU0135 means Lost Communication With Front Differential Control Module. Review likely symptoms, causes, safety considerations, and a sensible diagnostic order.U0136Lost Communication With Rear Differential Control ModuleCheck soonNetwork & Communication45–120 minutes for initial diagnosisU0136 means Lost Communication With Rear Differential Control Module. Review likely symptoms, causes, safety considerations, and a sensible diagnostic order.U0137Lost Communication With Trailer Brake Control ModuleCheck soonNetwork & Communication45–120 minutes for initial diagnosisU0137 means Lost Communication With Trailer Brake Control Module. Review likely symptoms, causes, safety considerations, and a sensible diagnostic order.U0138Lost Communication With All-Terrain Control ModuleCheck soonNetwork & Communication45–120 minutes for initial diagnosisU0138 means Lost Communication With All-Terrain Control Module. Review likely symptoms, causes, safety considerations, and a sensible diagnostic order.U0139Lost Communication With Suspension Control Module BCheck soonNetwork & Communication45–120 minutes for initial diagnosisU0139 means Lost Communication With Suspension Control Module B. Review likely symptoms, causes, safety considerations, and a sensible diagnostic order.U0141Lost Communication With Body Control Module ACheck soonNetwork & Communication45–120 minutes for initial diagnosisU0141 means Lost Communication With Body Control Module A. Review likely symptoms, causes, safety considerations, and a sensible diagnostic order.U0142Lost Communication With Body Control Module BCheck soonNetwork & Communication45–120 minutes for initial diagnosisU0142 means Lost Communication With Body Control Module B. Review likely symptoms, causes, safety considerations, and a sensible diagnostic order.U0143Lost Communication With Body Control Module CCheck soonNetwork & Communication45–120 minutes for initial diagnosisU0143 means Lost Communication With Body Control Module C. Review likely symptoms, causes, safety considerations, and a sensible diagnostic order.U0144Lost Communication With Body Control Module DCheck soonNetwork & Communication45–120 minutes for initial diagnosisU0144 means Lost Communication With Body Control Module D. Review likely symptoms, causes, safety considerations, and a sensible diagnostic order.U0145Lost Communication With Body Control Module ECheck soonNetwork & Communication45–120 minutes for initial diagnosisU0145 means Lost Communication With Body Control Module E. Review likely symptoms, causes, safety considerations, and a sensible diagnostic order.U0147Lost Communication With Gateway BCheck soonNetwork & Communication45–120 minutes for initial diagnosisU0147 means Lost Communication With Gateway B. Review likely symptoms, causes, safety considerations, and a sensible diagnostic order.U0148Lost Communication With Gateway CCheck soonNetwork & Communication45–120 minutes for initial diagnosisU0148 means Lost Communication With Gateway C. Review likely symptoms, causes, safety considerations, and a sensible diagnostic order.U0149Lost Communication With Gateway DCheck soonNetwork & Communication45–120 minutes for initial diagnosisU0149 means Lost Communication With Gateway D. Review likely symptoms, causes, safety considerations, and a sensible diagnostic order.U0150Lost Communication With Gateway ECheck soonNetwork & Communication45–120 minutes for initial diagnosisU0150 means Lost Communication With Gateway E. Review likely symptoms, causes, safety considerations, and a sensible diagnostic order.