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PO506 Idle Control System RPM low S70

posted by  jim70 on  Sun Aug 8 09:57 CST 2010
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last visit: Mon Nov 12 06:30 CST 2012
[RELATED]

2000 S70 non turbo -- Read ECL code and got PO506 -- I would appreciate any suggestions about the most likely cause and possible fix.

This is wife's car and ECL came on suddenly with no prior problems.

Thanks for any help.

Jim








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    PO506 Idle Control System RPM low S70

    posted by  tmannian on  Sun Aug 15 10:49 CST 2010
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    last visit: Sat Sep 20 10:31 CST 2014
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    Just a little information for you. Unless your ECM's going bad (very unlikely just this code is set off..) this code is nothing.

    This code gets set when the idle deviates too much from what the car thinks it should. It will either be high or low. High is usually caused by a large power consumer being rapidly shut off, while low is usually caused by the idle speed by it being turned on. What this means is lets say the car is at idle and she sharply turns the wheels, it could be set. Or if she were steering then decided to straighten out rapidly.

    Unless it comes back with others, its no concern...








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    PO506 Idle Control System RPM low S70

    posted by  KlausC on  Sun Aug 8 10:45 CST 2010
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    last visit: Fri Oct 24 10:15 CST 2014
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    P0506 Idle Control System RPM Lower Than Expected

    That is one of the error messages I normally clear and wait for it to return. Have your wife check the rpm when she comes to a stop, it should always be between 900-1000.

    It could be a dirty idle control valve or dirty throttle body. Perhaps your ETM has hickupped?

    Klaus
    --
    Two good Volvos, a 220 and a V70R








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      PO506 Idle Control System RPM low S70

      posted by  jim70 on  Sun Aug 15 08:08 CST 2010
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      last visit: Mon Nov 12 06:30 CST 2012
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      FYI -- A good throttle body and intake cleaning seems to have fixed the problem.

      Jim








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        Cleaning throttle body S70

        posted by  KlausC on  Sun Aug 15 09:11 CST 2010
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        last visit: Fri Oct 24 10:15 CST 2014
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        Something we all forget to do and need. Thanks for the reminder, I have a gasket sitting on my shelf waiting for me to use it :>)

        Klaus
        --
        Two great Volvos, a 1967 220 and a 1998 V70R







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