Had a '03 Murano pull this same nonsense with a JATCO CVT. There was an open recall for it's intake tract clamps after the airbox cleaner. Recall stipulated that unmetered air making it past the clamps and seals can foul with the MAF and cause engine stall. Got it done at dealership.
The car still randomly stalled. Then one day it would crank and crank and not catch and fire. No codes. Walk away from it for 15 minutes and try again. This time she did start. Still would randomly stall... but acted up again. This time the MIL came on. BINGO! I thought. Cam bank A sensor low voltage. CKP circuit malfunction/out of range. Back probed to check reference and signal wires, grounds. Check. Pull trigger on parts cannon. *BOOM!* A month later, stinking Murano pulls the same act.
Check power and grounds to ECU, since when it would crank and not start? I couldn't hear the EVAP vent and purge solenoids click and cycle or the fuel pump whir at key on, no dash diagnostic lamps. Checked fuses. Good.
Got a wild hair up my nose and pulled down the glove box. Checked power and ground at ECU. Power, check. Grounds. Grounds? Grounds?!
After half disassembling the dash and tearing down the kick panels in front foot wells, there are two studs the ECU grounds to. Rust and greenie crusting for miles. The moon roof tract was plugged and years of trickling water inside but not to carpet flooding levels just chewed them up. Clean and air blast the tract out. Wire brush, sandpaper and terminal clip and re-crimp. Fasten up the nuts and terminals on clean studs with a shot of battery terminal red grease over them.
Fixed for 5 more trouble free years until I traded that money pit on chrome wheels. Should have checked those grounds up under the dash before swapping those two sensors but hey, live and learn.
Edit: Memory just woke up after a half pot of coffee:
Nissan JATCO ECVT's indeed do have a locking torque converter. There was an ECU code stored for a transmission error too while the ECU grounds were acting up. I theorize that the computer couldn't drive the lockup solenoid properly with poor current/voltage. Something about an input clutch overrun/speed input-output mismatch. Fixing the grounds took care of all of it in my case.