Volvo 850 Made from 1993 to 1997, this Volvo line was available in both a wagon and a sedan, both with were graced with several trim levels.

97 850 T5 O2 Sensor

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Old Dec 17, 2010 | 07:13 PM
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Default 97 850 T5 O2 Sensor

Well, to make a long story short, I got cheap and bought a Bosch O2 sensor that needs to be spliced in. Now, I'm having a hell of a time finding a wiring diagram online.

I was hoping that someone could simply tell me what color the Signal, and ground wires are. I'm guessing the Heater wires don't matter as far as polarity goes, so correct me if I'm wrong.

Thanks.

edit: Just to clarify I only need to know about the wires already existing on the car.
 

Last edited by TOAB; Dec 17, 2010 at 07:35 PM.
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Old Dec 18, 2010 | 10:38 PM
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I'm not sure but if you go cheap, it might be best to get a used sensor from the yard.
 
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Old Dec 18, 2010 | 10:52 PM
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Well, I guess I'm just going to have to spend time out in the cold.

Might just end up tossing it in, clearing the code, and swapping wires until the CEL stays off.
 
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Old Dec 18, 2010 | 11:57 PM
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sometimes the universal O2 sensors WONT stop giving youa check engine light.
 
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Old Dec 19, 2010 | 12:44 AM
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Well voltage is reading slow on the stock one so it's not cutting it, if the scanner responds when the throttle gets blipped or stabbed I'll be happy.

If the computer gets a good voltage reading it should keep the light off, I'd just rather get it wired in correctly the first time.
 
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Old Dec 19, 2010 | 09:51 PM
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You can drive forever with a bad O2 sensor.
 
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Old Dec 21, 2010 | 02:00 PM
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Originally Posted by rspi
You can drive forever with a bad O2 sensor.
And because the ECU is thinking you're running lean it tries to compensate and your car doesn't run as well as it should.

FYI for those wondering, the wires are the same color.
 
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