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Thread: My turn with P2279

  1. #1
    Regular Member lee gsi's Avatar
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    Vehicle : Signum

    Trim : Design

    Engine : 1.9 CDTi

    Year : 2005

    Default My turn with P2279

    Car went into limp mode today when decelerating in gear.

    Egr has been cleaned (Wasnt that bad as I have the Fiat EGR gasket fitted).

    Checked the 2 vacuum hoses going to the valve by the battery/rad and one looks a bit perished but not holed. When I pulled it off vacuum escaped so its doing its job (Unless its closing/collapsing on deceleration). Ordered some vacuum hose anyway and going to replace then perished bits.

    Whats next lol

  2. #2
    North West Regional Organiser paulvectrac's Avatar
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    Vehicle : vectra

    Trim : vxr

    Engine : 2.8 v6 turbo

    Year : 2007

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    Intercooler pipes ??
    Vectra vxr custome remaps egr deletes dpf and diagnostic work all remaps are custome bench tuning avalible all genuine equipment PM for info

  3. #3
    Regular Member lee gsi's Avatar
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    Vehicle : Signum

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    Year : 2005

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    Had a quick look and cant see any splits and boosts fine.

  4. #4
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    Vehicle : vectra c

    Trim : ls

    Engine : 1800 non vvt

    Year : 2004

    Mileage : 137000

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    Quote Originally Posted by lee gsi View Post
    Car went into limp mode today when decelerating in gear.

    Egr has been cleaned (Wasnt that bad as I have the Fiat EGR gasket fitted).

    Checked the 2 vacuum hoses going to the valve by the battery/rad and one looks a bit perished but not holed. When I pulled it off vacuum escaped so its doing its job (Unless its closing/collapsing on deceleration). Ordered some vacuum hose anyway and going to replace then perished bits.

    Whats next lol
    i found this
    P2279 is an air intake fault of sorts. Possibilities, working your way down the air intake path (not sure these would all give the P2279 fault though):-
    1) Clogged air filter
    2) Faulty MAF sensor
    3) Hose leak from MAF to turbo
    4) Turbo problems - including vacuum hoses
    5) Hose leak from turbo to intercooler
    6) Leaking intercooler
    7) Hose leak from intercooler to throttle housing
    8) Throttle housing fault
    9) EGR fault
    10) Inlet manifold problem, icluding swirls
    11) Boost sensor fault

    .
    The vacuum hoses (2 thin hoses from the near right of the engine bay as you lead in - on a 120ps, not sure about 150) are common failure points. They tend to perish and eventually split at the elbow joints. You may not see the splits without flexing the elbows.
    Then check for splits in the intake hoses - the ones either side of the intercooler are prone as is the intercooler itself, but you would usually hear a whistling.
    If no luck, the MAF sensor attached to the airbox is the same for a 120 and 150, so if you know someone with a good one, it's a 2 minute swap out.
    Good luck!

  5. #5
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    Vehicle : vectra c

    Trim : ls

    Engine : 1800 non vvt

    Year : 2004

    Mileage : 137000

  6. #6
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    Vehicle : vectra c

    Trim : ls

    Engine : 1800 non vvt

    Year : 2004

    Mileage : 137000

  7. #7
    Regular Member lee gsi's Avatar
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    Engine : 1.9 CDTi

    Year : 2005

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    Valve moves fine and the solenoid also moves in and out fine.

    If it is the egr rather than buying one I will get it mapped out (And the dpf at the same time)

  8. #8
    Regular Member Critch's Avatar
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    Vehicle : vauxhall vivaro

    Trim : Basic

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    Year : 2004

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    What's you maf voltage?

    can you get access to smoke pro or similar?

  9. #9
    Regular Member lee gsi's Avatar
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    Yeah will use the works 'Smoke Pro' Monday.

    Its fine under normal driving but if I give it some welly 'then' decelerate thats when the code comes up.

  10. #10
    Regular Member lee gsi's Avatar
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    Not had a chance to use the smoke pro yet.

    But chanced the vacuum hoses and cleaned the boost sensor and that didnt make a difference.

    Just fitted another egr valve so will see if that makes a difference.

    Old egr valve I cleaned and the electric plunger bit was clean and free moving.

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