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Thread: P1109 fault code after alternator replacment

  1. #1
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    Vehicle InfoStats

    Vehicle : Vectra Estate

    Trim : Elite

    Engine : 1.9 cdti (150)

    Year : 2004

    Mileage : 88000

    Default P1109 fault code after alternator replacment

    Hi Everyone.Car wouldn't start Monday morning.Towed into local garage.Alternator replaced on advice of recovery truck and garage.Garage tell me there are two alternators for my car so they have to check which one I need as they are different voltages.Within 2 minutes of leaving garage after work done, car goes into limp home mode.Garage look at car again reset it, turbo now working again,but now say it has P1109 fault code.Could garage have fitted wrong alternator? Could they have caused the fault when doing the alternator change as have never had the problem before? Last time I did any diy work on a car it had carbs not a computer.

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    Vehicle : Golf 7

    Trim : GTD

    Engine : 2.0 TDI 184PS

    Year : 2014

    Mileage : 40000

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    Or it could be the throttle position sensor in the throttle body? Are there no other fault codes? P0638?

    A car that can't start and assuming the ignition and fuel system is fine then it leaves one culrpit imo - the throttle flap. This could be shutting over for some reason - usually due to an open circuit. Make sure they are satisfied which ever one it is. I had the throttle pedal replaced but it made no good. The fault actually lay in the Throttle body.

    http://www.vectra-c.com/forum/showthread.php?t=118784

    Gazza4

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    Vehicle : Vectra Estate

    Trim : Elite

    Engine : 1.9 cdti (150)

    Year : 2004

    Mileage : 88000

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    They didn't tell me any other code or sub codes.

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    Vehicle : Golf 7

    Trim : GTD

    Engine : 2.0 TDI 184PS

    Year : 2014

    Mileage : 40000

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    Quote Originally Posted by knfruitbat View Post
    They didn't tell me any other code or sub codes.

    Earlier CDTI's had an issue with the throttle pedal. Fault code P0638 - if the problem is what I think it is - will be there, but you will need Op-Com or Vaux-Com to find it as it won't be an active fault - just intermittent.

    Gazza4

  5. #5
    Regular Member paul wingnut's Avatar
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    Vehicle : vectra sri 150


    Engine : 1900 cdti 150

    Year : 2008

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    p1109 swirl actuator malf lift off top cover have a look at rod on manifold if its on start eng should move accross if not could have a fuse blown or its seized .

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    Regular Member paul wingnut's Avatar
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    Vehicle : vectra sri 150


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    the fuse you need to check is fe14 in box under bonnet

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