OBD codes / P0730
P0730
SeriousIncorrect Gear Ratio
Address promptly — can worsen or affect drivability.
Likely causes
- low or worn transmission fluid
- internal transmission wear
- faulty shift solenoid
Common fixes
- check and service the transmission fluid
- diagnose shift solenoids/internal wear
Seeing P0730 on your car? Get a diagnosis specific to your exact year, make and model.
Diagnose P0730 for my vehicleGeneric OBD-II reference. Manufacturer-specific behavior varies — confirm with a scan tool and, for safety-related codes, a professional inspection.