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Thread: Fault Code P261AA00: Coolant Pump "B" Control Circuit/Open

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  1. Re: Fault Code P261AA00: Coolant Pump "B" Control Circuit/Open 
    #11
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    Hi Chris, I hope you are still here.
    I know it was quite a long time ago when you wrote about this but I have exactly the same problem today. I get the same fault code in my Audi Q5 (engine CAHA).
    I'm not a car mechanic but I would like to change this pump by myself and I wonder if you have any instruction how to do it?
    Do I need to worry about the air that can get to the system?

    Thank you in advance
    Pawel
     
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  2. Re: Fault Code P261AA00: Coolant Pump "B" Control Circuit/Open 
    #12
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    It was fairly straight forward if you are a bit mechanically minded but as you say it was some time ago and I don't have the car any more to 100% confirm the following description. If I recall there are just 2 pipes to disconnect and a plug to remove and reconnect and a bolt or two that attach the pump in position. You will lose some coolant, I rigged up pipe clamps with two G clamps I had in the shed and in the Exeo/A4 ot is a bit of a reach down the right side of the engine as you look into the engine bay so the Q5 could be a bit more of a reach as it is higher off the ground. You can get premixed cooland from most car parts out lets and the system should self belld, just check the elvel after running the engine when its all reconnected and tehn agaon a day or two later. You dash will tell you if you have low coolant. The biggest pain is the price of the pump, I believe it was around £130 4 years ago.

    Good Luck!
    There are 3 kinds of people in the world, those that can count and those that can't.
     
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  3. Re: Fault Code P261AA00: Coolant Pump "B" Control Circuit/Open 
    #13
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    Thank you so much, I think I can manage it.

    So everything I have to be worry about is a coolant level? I don't need to worry about the air that can get to the system?
    I know for example if you change fuel filter you have to fill it up with fuel first and then connect to the system so there no air gets to the system.

    Regards
    Pawel
     
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  4. Re: Fault Code P261AA00: Coolant Pump "B" Control Circuit/Open 
    #14
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    Sorry there was a typo in my reply, it should self bleed! I certainly didn't; have a problem with air, the check after a couple of day's running will top up for any air that has beld out after compelteing the job that the initial top up when you do the work might have missed.
    There are 3 kinds of people in the world, those that can count and those that can't.
     
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  5. Re: Fault Code P261AA00: Coolant Pump "B" Control Circuit/Open 
    #15
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    For anyone still looking, I got away without buying the $500 pump, opened it up and rinsed out some rust/debris that was jamming the impeller and causing the fault. Hope this helps someone
     
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  6. Re: Fault Code P261AA00: Coolant Pump "B" Control Circuit/Open 
    #16
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    Hi. I have the same issue but on a A6 c7 , I replaced the old one and finding out that was stuck but after replacing, the error still popped up. What can cause the problem? Thank you
     
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  7. Re: Fault Code P261AA00: Coolant Pump "B" Control Circuit/Open 
    #17
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    I did this back in 2014 so my memory is not totally clear. IIRC I just fitted the replacement pump and I either used VAGCOM ( now VCDS) to clear or the fault cleared itself, not sure which. It never came back whilst I had the car. Not much help for your case I'm afraid. @Crasher could be able to help if you PM him.
    There are 3 kinds of people in the world, those that can count and those that can't.
     
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