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P0136 DTC o2 sensor B1 S2 Malf Help! V70-XC70

posted by  aerialimage on  Mon Aug 8 15:50 CST 2005
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last visit: Fri Mar 13 08:54 CST 2009
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My 99 V70 has 95,000 miles, at 88,000 miles the front o2 was replaced after a check engine light came on.
now at 95,000 miles the cel came on.
PO171B Bank 1 system to lean.
P1032 See service manual
PO136 o2 sensor B1 S2 MALF

I reset the codes! The PO136 was the only code that kept returning in just minutes. This looked pretty simple ( replace the involved component) Purchased the new expensive Volvo rear o2 sensor. reset code, road test, after any drive th elight always returns when the V70 coasts. as long as th ecodes were reset and throttle was applied th elight will remain out for as long as you are on the throttle. any ideas? I am thinking I will need a proper Volvo PC scan tool to pinpoint this? any other ideas? I have the genysis next generation scan tool from OTC the best cars are good at keeping there secrets unless we have the Volvo tools!
Thanks in advance.








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    P0136 DTC o2 sensor B1 S2 Malf Help! V70-XC70

    posted by  jrothe on  Wed Aug 10 09:58 CST 2005
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    last visit: Thu Nov 13 05:10 CST 2008
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    I would agree with you that the rear O2 sensor should have taken care of the P0136 code.

    The P0171 code has a faulty mass air flow (MAF) sensor among its possible causes, and that's a common failure point among our cars. It's also a bit pricey, at about $160 from FCP Groton, but at least it's easy to replace.

    You'd do well to look into All-Data for diagnostic help. See http://www.jimrothe.com/volvo/backyard_mechanics_resources.html.

    --
    Jim Rothe, '99 S70 T5M,
    http://www.jimrothe.com/volvo/index.html








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    P0136 DTC o2 sensor B1 S2 Malf Help! V70-XC70

    posted by  aerialimage on  Mon Aug 8 15:53 CST 2005
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    last visit: Fri Mar 13 08:54 CST 2009
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    Sorry for the poor typing skills, I always leave that E stuck to the next word. Time for a typing class After I get this V70 debugged.







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