How is speed sensor have effect to transmission gear slip or free gear at high speed?

a Generation 4 car.with CVT transmissions (horrors)
manufactured here. but how speaks English there?
2010-2016 (Japan)
2012-2019 (Indonesia)
2014-2018 (Malaysia)
no year told car. wow.! 2010- to 2018 made
not one Serena sold in USA so no books here .
nor for this.
Nissan Serena C26 S-HYBRID real name is this
you forgot the HYBRID fact.?
well NO VIN told no engine told no county told nor if car is 4wd or what transmission is there (shows CVT)
we can not guess cars. and they are not the same all over earth.
VSS speed sensors (veh.speed sensor)

• so did scans of PCM show this error?? not told
• or some dweeb on the internet said find it.?
• or the speedometer went dead?
• transmission stopped up-shifting?

Generic answers.
some cars have 5 to 8 vss sensors
3 in transmission and 4 for ABS brakes.
my car uses ONLY ABS for speed. simple as that.
some cars the 1 VSS is on tail shaft of transmission
or on tail shaft of AWD box.
see?
no car told end hunt. vss.

not transmission told or engine or VIN
is this A/T or M/T box, only 1 clue told :"GEAR"
the wrong fluid will be a train wreck in any box.
never guess it. or listen to network dweebs. (rumors)
these service manual is best.
ATF fluid or GL3 lube is not the same ever.
OR CVT box, never ever ever guess this one.
no Serena here, USA
line up 2003

Engine

1.5 L 4A15 I4
2.0 L SR20DE I4
2.0 L QR20DE I4
2.5 L YD25DDTi I4
2.5 L QR25DE I4

Transmission

5-speed manual tweedle dee (dah STICK SHIFTER)
Hyper CVT 4-speed automatic or tweedle dum ( a slush pump)

sorry no can guess what is there. ever. blind.

bad speed sensor

Check the wiring to the transmission speed sensor on the transmission. There are several, you want the Brown/red, Black and White all to the same sensor (On a Sentra, it is on the rear of the transmission toward passenger compartment. Wiggle connections to see if that helps. This is also known as the revolution sensor. BR/R = 12v with key on, zero otherwise. W is speed sensor and pulses when moving. Black is TPS Ground - 0V. == All three feed to transmission control computer.

you will
get all info on wiring/electrical/fuse diagrams, error/fault codes, torque specs, PCV, service info, repair info, parts info, owner's/service/repair/parts/maintenance manuals etc everything totally
this website www.reliable-store.com
it's a very good site for all vehicles even my car 1991 model.

Test and check torque converter.

It sounds like the transmission is slipping and the sensor is just reporting this info and setting a code, you have made a common mistake. You likely need a transmission overhaul

This sounds like a slipping transmission , check the fluid level first and make sure its full, if its full then you have ****** problems and may need to have ****** rebuild done,

Another thing is to make sure the trans passing gear cable is connected at the throttle where the gas cable is.

the reving metre goes up to 4 and later drops, the speed charges to slow immediately. When speed metre is at 20km/hr the reving metre is at 2.5 ,normally at 2.5 rv the speedshould be at 110 to 140 km/hr. What is causing this?

Hi! i have a 2002 nissan altima(3.5 with automatic transmission). i just got the same codes today. i had 2 different nissan technicians check my car. and they told me it's the revolution speed sensor. After 30 min. of use my car revs high until 8,000 rpm and stays on the same gear for a full 5 seconds or more, then changes to the next gear harshly!! sometimes it just won't change gears and i have to stop in the middle of a highway or avenue. lol!!! when i brake to a complete stop, the transmission slips. does this happen to you? good luck, bro!