Volvo AWD 850 Forum

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Fault code 4-3-5 850 1995

posted by  someone claiming to be Tupperware on  Wed Mar 21 17:23 CST 2001 [RELATED]

Does anybody know what fault code 4-3-5 means?

tia







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    Re: Fault code 4-3-5 850 1995

    posted by  someone claiming to be John O on  Wed Mar 21 23:25 CST 2001 [RELATED]

    Front O2 sensor slow. Replace your front O2 sensor.







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      Re: Fault code 4-3-5 850 1995

      posted by  someone claiming to be MH on  Thu Mar 22 05:05 CST 2001 [RELATED]

      From previous posts it appears that there are two schools of thought on removing the intake manifold to replace the O2 sensor. What is your expert opinion on this? Also for the shadetree mechanic, what is the degree of difficulty in replacing the sensor?

      Thanx







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        Re: Fault code 4-3-5 850 1995

        posted by  someone claiming to be Rich K. Fairfax, VA on  Thu Mar 22 10:53 CST 2001 [RELATED]

        The link below has a pictorial post on the replacement of the O2 sensor. No you don't have to remove the intake or exhaust manifold.







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        Re: Fault code 4-3-5 850 1995

        posted by  someone claiming to be Jeremy on  Thu Mar 22 06:53 CST 2001 [RELATED]

        I've replaced the front O2 sensor myself. It took about an hour on my back under the car, which was supported by two Rhino Ramps. My car is a 94 Turbo. Getting the wiring out of the clips on the motor mount was tricky, and I just zip tied them back on. It can be done, but it takes some time an dexterity.







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        Clearing up previous ambigious question 850 1995

        posted by  someone claiming to be MH on  Thu Mar 22 05:10 CST 2001 [RELATED]

        Do you have to remove the intake manifold to replace the front O2 sensor?







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          Re: Clearing up previous ambigious question 850 1995

          posted by  someone claiming to be John O on  Thu Mar 22 12:48 CST 2001 [RELATED]

          No, the front O2 sensor is nowhere near the intake manifold as it's threaded into the exhaust manifold in front of your cat. conv.. The rear O2 sensor is behind the cat. conv.

          I think you're thinking of the knock sensors, not related.






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