850 T5 stalling

Good day gentlemen/ladies

I had a bit of a scare whilst driving on the highway at approx 100 kmh. The
car stalled/ switched off.
I was off throttle and when I tried accelerating ...nothing. I pulled off
onto the emergency lane , turned the ignition off, selected park and tried
starting
The car started on the 4th attempt.
I have replaced the turbo control valve. The MAF sensor might be a culprit,
but I suspect the gearbox position sensor( inhibitor switch). My reasoning :
the gearbox on startup goes into winter mode. I rectify this by engaging
gears , letting the oil settle a bit.
(gearbox has been flushed and oil changed) This problem has been with me a
while.
Is the inhibitor switch the same as the PNP switch ?
Could this cause the ECU to switch the car off ?
P.s the car is a 1994 850 T5 auto
Thank you

 

I have this problems , not often, but occasionally and not when
accelerating...usally in Park ...have a 98 S70 t5...have no answers and
the codes my shop ran and pulled did not indicate a specific problem.
....they did mention turbo valve connections though.

 

Oh yeah...when my car stalls it starts right up but need to accel
somewhat firm....also have noticed this clicking sound in Park /idle
and then the engine revs alittle ...then does this over and over like
clockwork...did not do this in cold weather (its 85 degrees here in the
Balt-Wash DC area today) just stalled occasionally.

 

My problem never re-curred (4 days now) but its a pity I cant replicate it
on demand.
Just scary not knowing when it will re-cur , especially with the wife the
driver most times.

 

I have replaced the inhibitor switch.

Will have to wait and see , hopefully wont have transmission issues
anymore!!