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Thread: unknown fault code

  1. #1
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    Default unknown fault code

    Hello to all hoping someone can help me on a fault code matter. I just bought a fault code reader recently but anyone i known (mechanics) and all don't known the code which is P2279-5A <Unknown DTC> . The vectra is a 08 150bhp cdti sri and has a tuning box fitted about 6 months ago and i never had any problems. Its the emissions warning light that lights up but doesn't stay on for long. (day on day off roughly). You can feel the engine holding back just before the light pops on and the tuning box is from (race chip pro) in germany. Hope someone out there can put my mind at rest on the matter please.

  2. #2
    Full Member chrisvectra's Avatar
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    Vehicle : VXR8 6.0 muscle SRI ESTATE XP1

    Trim : VXR/ SRI ESTATE CDTI XP1

    Engine : 6.0 V8 Thunder

    Year : 2008

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    have you tried running the car without the tuning box? to see if the light comes on without the tuning box
    VXR IS FOR LIFE NOT JUST FOR THRILLS !



  3. #3
    Regular Member XPCobra's Avatar
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    Vehicle : Vauxhall Vectra Hatch

    Trim : SRI with added X-Pack

    Engine : 1.9 16v 150

    Year : 2006

    Mileage : Near 100K

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    Air intake system leak. Clean your egr valve out, common problem

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    Had a new egr value fitted 2 weeks ago mechanic said it would sort it costly mistake will have to unplug box i guess and see what happens if there is no more ideas popping up!!!

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    Vehicle : Golf 7

    Trim : GTD

    Engine : 2.0 TDI 184PS

    Year : 2014

    Mileage : 40000

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    If it's not the EGR valve, have the intercooler checked. They are another weak spot.

  6. #6
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    Vehicle : vectra c

    Trim : ls

    Engine : 1800

    Year : 04

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    it may be the electrical connection block that fits onto the EGR it needs to be fitted snug in place.

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    Will check connection tomor and get intercooler checked out fingers crossed its just the connection thanks for the ideas guys

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