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Thread: confusing P1112 fault code

  1. #1
    Regular Member Casper85's Avatar
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    Vehicle InfoStats

    Vehicle : Vauxhall

    Trim : Vectra SRi

    Engine : 2.2direct Z22YH

    Year : 2006

    Mileage : 54600

    Default confusing P1112 fault code

    Hi guys.

    What is the real description for code P1112???

    When I had my code read it came up with:

    P1112 - SWIRL FLAP STUCK OR SWIRL FLAP ADAPTION MALFUNCTION OR SWIRL ACTUATOR MALFUNCTION.

    But looking through the fault code list on this forum P1112 means INTAKE AIR TEMPERATURE (IAT) SENSOR CIRCUIT INTERMITTENT LOW VOLTAGE.
    So what does P1112 mean??? Do I have a fault with the swirl flaps or is there something wrong with the IAT sensor??? Only thing I could mention is that I noticed the emission light came on (after being cleared) when temp gauge was over 90 degrees, driving in slow moving traffic. I have a Vectra 2.2direct.

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    Hi Casper85

    I have just had the same problem with my 56 plate 2.2 direct. Apparently, its a common fault.
    I had the IAT sensor replaced for £120 by a local garage and this then flagged up the swirl flaps. I know its not cheap, but get vauxhall to look at it as they do a modification for the swirl flap problem. Cost me just over £500, which included full diagnostic, parts, labour and ECU re-set.. Hope this helps.

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