850 AUTOMATIC- PROBLEM WITH AUTO GEAR CHANGE IN COLD WEATHER

[richard]

My 1995 Volvo 850 has a problem with the automatic transmission when
starting from cold, with the fault becoming more problematical in cold
weather. The orange arrow on the instrument panel starts flashing and
the gearbox selects a low gear and will not auto-change up when the
engine revolutions are increased. Turning the engine off and restarting
in neutral usually remedies the problem until the next cold start. I
have checked the fluid level and that appears fine.
Any help or advice would be much appreciated.

 

[OBD]

PNP switch

http://www.volvospeed.com/Repair/pnpswitch.htm

 

[volvoguy]

Sounds like it could be the gear position sensor located on top of the
trans right where the shift cable connects or the mode selector switch
next to the sifter. More than likely the gear sensor. See if the car
starts in neutral. If it doesn't it poss. the gear sensor