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Thread: 2.0DTi Fault Codes

  1. #1
    New Member martint's Avatar
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    Default 2.0DTi Fault Codes

    Hi all

    I've recently joined the forum, and have OP-COM in the Littlehampton Area

    Car has been drinking a bit too much fuel for my liking lucky if I get 40mpg, going in for service monday and also to diagnose any faults.
    Anyway The car with spanner symbol came on the dash the other day and after running in Limp home mode, turned engine off and restarted seems to clear fault.

    I have just run OP-COM on car with no symbol on dash and the following faults are logged

    B3794-08 Switch Cruise Control Circuit Malfunction - Switch is intermittant not fussed really but is it easy to change switch?
    B3916-0F No Communication with Alarm Siren - ???
    B0283-05 Pane Break Open Circuit - Fuse is removed as last summer Alarm kept going off when very hot

    Just been out for run to induce fault so car/ spanner symbol on dash
    got home re ran OP-COM

    1 extra fault code now
    P0234-5B Boost Pressure Control Circuit Positive Deviation

    If any one could shed some light on the Boost Pressure code would be greatly appreciated.

    MT

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    Vehicle : Vectra

    Trim : Design

    Engine : 1.9CDTi

    Year : 2005

    Mileage : Lots

    Default

    Cruise control - not sure on that one but could be something to do with the switch on the clutch?

    No communication with alarm siren - some people unplug the siren in the boot because it's pretty quiet. This forces the car to use the horn instead. Look in the left corner of the boot behind the panel and you should see the siren, sounds like it just needs plugging back in.

    Pane break open circuit - I believe the heater strips in the rear window are used to determine if the window has been smashed. If some of the strips are broken the alarm thinks the window has been put through. Got some bad heating elements in it?

    Boost pressure control circuit - try cleaning the boost sensor. It's a common fault on the DTi engines. Causes low power. Do you know where it is? Can be difficult to explain but there's pictures on the site in how 2's that you can see it in. Only takes 5 minutes.

  3. #3
    New Member martint's Avatar
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    Default

    Thanks cont1204, not really fussed about the alarm and cruise control but the boost pressure sensor is a must fix will try and have a hunt for the pictures in the How 2's

    MT

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    Vehicle : Vectra

    Trim : Design

    Engine : 1.9CDTi

    Year : 2005

    Mileage : Lots

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    Here you go, found a quick photo thanks to Innes tutorial for boost pipes, hope he doesn't mind me borrowing it!

  5. #5
    New Member martint's Avatar
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    Thanks cont1204

    sorry to be a pain but whats the big silver thing with the black tube just below?
    is that the EGR valve?

    will that have to come off to get the boost sensor out??

    sorry for all the questions but not really mechanically minded more electronic n computers.

    MT

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    Vehicle : Vectra

    Trim : Design

    Engine : 1.9CDTi

    Year : 2005

    Mileage : Lots

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    Ah bit like me then! But seriously this is a walk in the park. You'll need to undo the black hose and pull it off (well don't have to but allows for more movement) then undo the 4 bolts on top of the silver bit the black pipe connects to. Can then just undo the boost sensor and give it a pull - they seal in tight so they don't let air out so will need a bit of a tug to get it out.

    Yes that is the EGR but it doesn't need to be removed to clean the boost sensor. It does no harm to give them a clean up though.

  7. #7
    New Member martint's Avatar
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    Hey conti1204

    think i have fixed the problem, found a thick rubber seal on the vac pipes that run to the componant behind radiator had a split in in not sealed at all just been for run and hey presto can't get it to fail and goin Limp home mode

    got the vac seal pipe from motor factors £3 for a metre

    I will get round to clean boost sensor and egr valve but not today as its raining

    Cheers

    MT

  8. #8
    Regular Member Graham's Avatar
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    Vehicle : Focus

    Trim : Titanium

    Engine : 1.6 TDCI

    Year : 62

    Mileage : 9K

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    Quote Originally Posted by cont1204 View Post
    Ah bit like me then! But seriously this is a walk in the park. You'll need to undo the black hose and pull it off (well don't have to but allows for more movement) then undo the 4 bolts on top of the silver bit the black pipe connects to. Can then just undo the boost sensor and give it a pull - they seal in tight so they don't let air out so will need a bit of a tug to get it out.

    Yes that is the EGR but it doesn't need to be removed to clean the boost sensor. It does no harm to give them a clean up though.
    To remove boost sensor, just undo 1 bolt that attaches it to the silver thing. No need to remove the silver thing at all. Think the bolt is 10mm.

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    Vehicle : Vectra

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    Year : 2005

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    Quote Originally Posted by Graham View Post
    To remove boost sensor, just undo 1 bolt that attaches it to the silver thing. No need to remove the silver thing at all. Think the bolt is 10mm.
    True but it can be a right sod to get to with it being 'underneath' the sensor. Means you can clean the throttle body up when it's off too.

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