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Thread: CODES Help....

  1. #1
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    Default CODES Help....

    my vectra c 2.0 dti engine management light came on when i was driveing slow in second gear and when i sped up the light went off same thing happened in third gear but not in first , fourth or fifth gear. so i got it put on the computer n these codes came up:

    P1105 - BARRO METRIC PRESSURE NOT PLAUSIBLE WITH BOOST.

    P105

    Can anyone help me out on what is wrong with my car or what they mean?

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    I had a similar problem a few weeks back and read the same fault code.

    I believe that the Barometric pressure sensor measures the external air pressure as some kind of reference value for the boost pressure to be based upon. Knowing this....

    I removed the Barometric pressure sensor, cleaned the electrical contacts blew gently into the hole underneath to remove any loose debris (Scientific I know!). When fitted back it still gave the same fault.
    It then dawned on me the fault may lie with the boost sensor on the inlet manifold. Just removed it, cleaned VERY GENTLY with a small artist brush and some WD40, refitted it and no fault since and LOTS more power!

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    clean the boost sensor, carb cleaner is good along with a tooth brush

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