OBD-II trouble codes

Ranked by how often the code appears in real NHTSA owner complaints - not alphabetically. P = powertrain, B = body, C = chassis, U = network.

Browse by symptom

Rough idle / shaking Stalling Hard starting Hesitation / power loss Flashing check engine light Poor fuel economy Shifting problems Temperature / cooling ABS / dashboard lights

Codes whose typical symptoms include shifting problems - most serious first:

P0705Transmission Range Sensor A Circuit (PRNDL Input)P0730Incorrect Gear Ratio U0101Lost Communication With TCM P0500Vehicle Speed Sensor A Circuit P0700Transmission Control System (MIL Request)P0703Brake Switch B Circuit P0715Input/Turbine Shaft Speed Sensor A Circuit P0720Output Shaft Speed Sensor Circuit P0740Torque Converter Clutch Circuit/Open P0741Torque Converter Clutch Circuit Performance/Stuck Off P0742Torque Converter Clutch Circuit Stuck On P0750Shift Solenoid A P0725Engine Speed Input Circuit