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'09 S80 / 97K miles / P0304,5,6 & P0300 Codes occurring together S80

posted by  rob2volvos on  Tue Apr 27 12:41 CST 2021
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last visit: Wed Mar 12 07:52 CST 2014
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Hello,
I am looking after an '09 S80 (T6 engine) for a while. Car not used much recently and starts roughly. CE light on. Read codes and get P0304, 5, 6, and P0300. I intend to inspect the ignition coils and spark plugs -- but is there a vacuum system / suspect hose failure that might give rise to this combination (Bank 2?) of codes? I have looked around on web and have not seen specifics on vacuum components related to ignition for this model -- Thanks for any comments!








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    '09 S80 / 97K miles / P0304,5,6 & P0300 Codes occurring together S80

    posted by  someone claiming to be Herb Goltz on  Fri Apr 30 21:16 CST 2021 [RELATED]

    That's a misfire in half the cylinders. Makes me wonder if your charging system is up to par-- what is your DC voltage across the battery terminals while running? These P2 cars are very voltage-sensitive.

    Do you have access to a VIDA-DiCE set-up? You could get more specific codes that a generic reader won't give you.








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      '09 S80 / 97K miles / P0304,5,6 & P0300 Codes occurring together S80

      posted by  rob2volvos on  Sat May 1 16:02 CST 2021
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      last visit: Wed Mar 12 07:52 CST 2014
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      Thanks, Herb -- That's a good thought.
      When I got hold of the car the battery (only a year old) was discharged and I took it back to Advance and they charged it up, claimed it was good and sent me on my way without replacement. Hmmm .. so your comment already rings some bells. Did not know about that voltage-senstivity -- I'm more used to the RWD 940/740 models.
      Don't have a VIDA-DICE -- I think I'll duck this one and punt it back to the owner -- Appreciate your helpful comment -- Rob







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