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> Obd Sensors Not Working
crispy1
post Oct 21 2007, 09:15 AM
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Joined: 22-August 07
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Location: St. Louis, MO USA
Drives: 1998 Volvo S90
My s90 sat idle for several months. When I took it to get a state inspection, they said they couldn't perform it 'cause the on board diagnostic sensors weren't working. Dealership said to drive it, and they would kick back in. Apparently this happens alot. I'm still waiting.

Anybody had experience with this? Is this only on S90's or do all 1998 and newr Volvos do this too? Why does the car shut down its ODBs when it is n't driven?
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Ryan 20
post Oct 22 2007, 03:36 AM
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Drives: 1984 Volvo 245 DL
The NON continuous monitors reset to not ready if the PCM\Computer loses power (IE) Disconected battery or dead battery All OBD Does this it just takes longer\more driving on some. 1996 And newer Or all OBD II have to have so many NON continuous monitors ready before you can Pass the Emissions test. Once the monitors Run thier test this is when it will set DTC's DIAGNOSTIC TROUBLE CODES which will turn on the MIL\Check Engine Light If theres any Problems.
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Ryan 20
post Oct 26 2007, 06:25 PM
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Drives: 1984 Volvo 245 DL
Did you unhook the battery or did it go dead ? Either way you have to keep driving until the NON Continuous Monitors are ready you can check if they are ready with a OBD II Scanner. I found this to it should help http://www.deq.virginia.gov/mobile/mobobdm.html
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