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Thread: White Smoke P0400

  1. #1
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    Default White Smoke P0400

    Hi,

    Need some help here, I have a vectra c 1.9 cdti 150 with 190k miles and it's blowing white smoke, the engine management ligh is on with the code P0400.

    The smoke starts when the engine warms up.

    The car runs fine, no problems, I don't notice no performance issues on high rev or low rev.

    I have tried the following:
    - Replaced the EGR valve.
    - Cleaned the turbo sensor connected to the inlet mainfold.
    - Glued the swirl valves to 10 o'clock position, the rod came off and the 4th valve had oil or soot spewing out on high revs, so I glued 1,2 and 4th.
    - I can't see any leaks, or smoke coming out of the engine/egr/inlet mainfold.

    None of the above fixed, the weird thing is that the car runs just fine, the car as a P0400 code but I wonder if that is causing the white smoke problem.

    I now think is the inlet mainfold but didn't want to spend much money because the car has 190k, I plan to replace by end of next year so if I could squeeze more miles it would be great.

    Can anyone help me, any advice?

    Thanks in advance.

  2. #2
    Regular Member shane b's Avatar
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    Vehicle : sri estate nav sunroof

    Trim : leather

    Engine : cdti 150

    Year : 2006

    Mileage : 120000

    Default

    isn't by any chance a estate is it ?

  3. #3
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    Quote Originally Posted by shane b View Post
    isn't by any chance a estate is it ?
    No, it's an hatchback ... why? did you have the same problem?

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    Vehicle : vectra

    Trim : design

    Engine : 1.9 150 diesel

    Year : 56

    Default

    what dtc code reader have you used,as the code is egr related so first i would check the conection on the egr,have you blanked it off

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    Default

    Quote Originally Posted by paula9568 View Post
    what dtc code reader have you used,as the code is egr related so first i would check the conection on the egr,have you blanked it off
    I used some software I found on the net, not a good one because i also have the abs light on and it’s not reading that code (can someone recommend a good software?).

    Its not blanked but I’ve unplugged the egr to test and made no difference, same power, same smoke ... I’m wondering if the new egr valve is faulty?

  6. #6
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    Default

    Or the wiring to/ from the egr valve. .

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    Vehicle : vectra

    Trim : design

    Engine : 1.9 150 diesel

    Year : 56

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    buy yourself op c----m and read the codes, buy it off e bay

  8. #8
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    Vehicle : vectra

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    Year : 56

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    is it a automatic

  9. #9
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    Quote Originally Posted by paula9568 View Post
    is it a automatic
    No, it’s manual

  10. #10
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    Default

    Problem fixed, the new egr valve that I bought was faulty, bought a second-hand one to test and it worked.
    I still have issues with the swirl flaps but it shouldn't cause any issues with the mot that is due.

    Hope it helps anyone with the same issue.

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