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'94 850t Transmission fault

Help, Advice and DIY Tutorials on Volvo's P80 platform cars -- Volvo's 1990s "bread and butter" cars -- powered by the ubiquitous and durable Volvo inline 5-cylinder engine.

1992 - 1997 850, including 850 R, 850 T-5R, 850 T-5, 850 GLT
1997 - 2000 S70, S70 AWD
1997 - 2000 V70, V70 AWD
1997 - 2000 V70-XC
1997 - 2004 C70

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TODonnell
Posts: 2
Joined: 30 December 2007
Year and Model:
Location: Hood River OR USA

'94 850t Transmission fault

Post by TODonnell »

I have a '94 850 turbo wagon with 175K miles. The dashboard arrow (transmission) lights up occasionally and won't reset until I shut it down and set overnight. I plugged my scan tool into the console socket but no codes are shown. I left the scan tool plugged in and drove the car and noticed that at high speed the arrow would occasionally light and it felt like the transmission slipped out of overdrive momentarily or out of lockup while the dashboard arrow lit for a fraction of a second then went out and lockup resumed. This scenario would repeat after a few minutes and would keep repeating at several minute intervals. Otherwise the car functions fine. Any thoughts?
I recently had to replace the radiator after striking a coyote at night and subsquently replaced the head gasket.
T. O'Donnell

MadeInJapan
MVS Moderator
Posts: 13434
Joined: 31 March 2005
Year and Model: '98 S70 T5 '07S40T5
Location: Knoxville, TN American but born in Japan
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Post by MadeInJapan »

Sounds like it could be the PnP switch. (park-neutral-position). Do a search here as well as taking a look in the repair database. Several have posted about this in the past.
'98 S70 T5 Emrld Grn Met/Beige Tons of Upgrades Mobil-1
'04 V70 2.5T Red/Taupe Some Upgrades Mobil-1
'07 S40 T5 AWD 6 speed manual! Silver/Black Stage1 Heico & Elevate
'07 S60 2.5T Blue/Taupe- my kid's Volvo

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