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1996 850 GLT OBDII Reset

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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osmium
Posts: 208
Joined: 2 July 2009
Year and Model: 96 850 GLT
Location: Nashua, NH

1996 850 GLT OBDII Reset

Post by osmium »

I've replace the read O2 sensor and reset the code.

How many miles need to be driven the get the data to be ready?

Emission related items a still showing not ready after about 100 miles.?

Any advantage to just disconnect the battery to get it to relearn everything?

-Os
1996 850 GLT 262k miles (gone :( )

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1999 Honda Civic (gone)
1996 850 GLT (gone, no more Volvos :( )
2000 Buick Park Avenue (gone)
2005 Honda Odyssey (gone)
2013 Lexus ES350 (replaced Volvo 850)
2021 Honda Pilot

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misha
Posts: 5379
Joined: 7 December 2008
Year and Model: '97 850 2.5 20v
Location: Serbia
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Post by misha »

There is a relearn procedure for these cars.
Also,there is a special driving cycle for forcing monitors to read ready.
Without relearning or driving cycle procedures it can be more than 1k miles for monitors to become ready.
'97 850 2.5 20v / fully equipped / Motronic 4.4 from the factory / upgraded with S,V,C,XC70 instrument cluster / polar white wagon
History of Volvos in the family:
'71 144 S
'73 144 De Luxe
'78 244 DL
'78 244 DL
'79 244 GLE
'85 340 GLS

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