High RPM without corresponding acceleration in your 2022 Nissan Sentra indicates CVT slip - the belt isn't transferring power effectively from the engine to the wheels. This symptom typically means internal transmission problems.
What High RPM With No Acceleration Means
When you press the accelerator, engine RPM rises. In a functioning CVT, the belt transfers this power to the wheels, and you accelerate. When the belt slips, RPM rises but power doesn't transfer - you get noise but little motion.
Why CVTs Slip
The CVT belt is clamped between variable pulleys that squeeze it to transfer power. Insufficient clamping pressure allows slip. This can result from low fluid, internal wear, pressure system failure, or belt/pulley damage.
Code P0730 Confirmation
P0730 incorrect gear ratio code confirms the TCM sees a mismatch between input and output speeds. This code basically says "the transmission isn't transferring power as commanded." Combined with high RPM symptoms, this confirms CVT slip.
Severity and Progression
Occasional slip may progress to constant slip. Each slip event damages belt and pulley surfaces, accelerating wear. Eventually, the transmission may not move the vehicle at all. Early intervention offers the best chance of affordable repair.