Nissan Repair Questions? Ask a Mechanic for Answers ASAP
no, a sensor will not cause CVT whine.
It's usually related to the belt or drum.
I must have misread the original question then some how sorry.
The 2003 year model is one of the few year models that had an external speed sensor if i recall off memory. let me check. brb
yes the 2003 model has the secondary speed sensor that is replaceable. all the others are internal to the CVT which is normal on all newer CVT's, but this one at least has teh secondary speed sensor that is replaceable externally.
generally when the secondary seed sensor fails the pulley ratios are off or delayed. The CVT doesn't really "shift" but it uses pressure to effect the ratio of the belt by moving the pulley. this is what feels is like a shifting.
the secondary speed sensor "could" cause your problem yes, but it's not guaranteed obviously. Especially if you don't have a fault code for it. Definately a good place to start though, because your other options aren't very good really.
the sensor is located on the top of the transmission a couple inches in front of the transmission vent tube.
it is called "secondary speed sensor"
if you need anything else let me know.
if not just be sure to leave a kind rating is all.
that's fine, once you leave a rating I can keep the question open for 7 days.
if you need help after that i can offer you an email exchange.