P0793 Fault in 2016 Toyota Camry: Heavy Jerk at 60 KM/H and No Signal Sensor Issue

I recently noticed the P0793 diagnostic code appearing on my dashboard, but it disappeared after a short time. The code indicates 'P0793: Intermediate Shaft Speed Sensor "A" Circuit No Signal'. While driving, I experience a noticeable heavy jerk when the vehicle reaches 60 KM/H, as if a gear is missing or something in the transmission isn't functioning properly. I've consulted with a mechanic who estimates the repair cost at around $400, which includes replacing the sensor and opening the transmission. While this seems plausible, I'm seeking more insight into whether others have encountered this issue on the 2016 Toyota Camry model or if there's a known diagnostic procedure for this specific fault. The P0793 code relates to the intermediate shaft speed sensor 'A', which monitors gear position and transmission operation. A no-signal condition could indicate a faulty sensor, wiring issue, or internal transmission problem. I'd appreciate any detailed information on how to diagnose or verify this issue accurately.