Power steering fails, shifts poorly, jerks, stalls

SOLUTION.
I Had Nissan Serena C24 of 2000 with similar Problem of Loosing power after Long drive in Highway or climbing hills or during Hot Days..
The Catch is The Transmission Fluid gets high temperature and the pulley bands or chain of CVT Transmission fails to shift hence Car stalls.
Solution is to use The large Transmission Cooler to assist the Cooling.
Me I bought two Mitsubish pajero Oil coolers, went to mechanics fixed them in transmission cooling system in front and Add about 1L of Transmission Fluid And the Problem ended.
All the best

Here are the common cause of surges, stalls at stops, slow idle speed, erratic idle, it is in most cases the idle speed control air-bypass valve and/or throttle valve and upper intake, these area's get full of gunk and combustion residue over the miles and cause idle issues (stalls, low idle) like yours, Get a can of intake cleaner from any local parts store, not carb spray, intake cleaner, it is made by a company called CRC, remove the air intake hose to the engine, hold the idle high so the engine won't stall, then spray the can of cleaner into the intake while keeping the engine running, use at least 1/2 the can, shut down the engine and disconnect the battery for 5 minutes, then restart and complete a number of mixed driving

Make sure the trans cooler is getting a good air flow. and a trans flush is always good, and most oil change shops do it for around $89+

did it restart?
the engine stalled, as such you
get
no engine power
no P/S reverts to manual steering, you did not loose steering.
same with P/B power brakes, you didnt lose it you lost power
assist, brakes will stop just as vast but takes a husky foot.
in school (driving) we were though to drive, stalled engine.
i guess most school went dumb. (seen it)
now stalls
engine stall for a vast number or reasons.

do that tuneup not called the 60k mile service point list. did you.?
cars ignored all fail, no car runs 300k miles service free,
skip them and get stranded, (i promise)

1: lost electric power to the EFI system.
2: engine overheated or lost compression for any reasons (complex)
3: lost spark
4: lost fuel
5: too much fuel, flooding, and stalling.
6: egr sticks open.
7: ISC sticks closed.
8:if not restart, say so and list expands way more...

cars are complex, it's not like a burned out desk lamp.
vast complexity and after 2007 , insane complexity.
avoid them 2007 and newer, sans NASA engineer.

Failed fuel pump is where I would
start my testing

look for pressure switch on power steering pump or power steering pressure hose dirty or sticking idle air control

Definitely sounds like a fuel problem. I'd change fuel filter and check fuel pump. If pump is running it could still be partially clogged. Try a fuel rail pressure test with a knowledgeable mechanic.

First make sure it is actually the pump and not the drive belt to the pump. If that checks out ok, then remove the P/S fill cap and turn the steering wheel fully left and fully right 10 times. This will remove any trapped air from the system. If that does no good then purchase a can of Seafoam Trans-Tune and add 2 ounces to the reservoir. If that still does not solve your whining & jerking problem after about 25 miles of driving, then the pump will have to be replaced.

its your M.A.F thats the air flow sincer i had that problem also but as soon as i got a new 1 it stopped and ran fine. the part cost about 160 bucks at auto zone and is easy to take off and put on yourself cuz the shop charge about 300 bucks to do a 3 min job but im sure that is the problem with your car

I had a similar problem and resolved it by replacing the mass airflow sensor. Ive got 235k+ miles on my 1992 Maxima SE.
Still runs good but having problems with the alarm system.