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Thread: Diesel running in Limp mode.

  1. #1
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    Default Diesel running in Limp mode.

    Hi

    My car is an 04 2.2 Dti Vectra.

    Just come back from drive of about 100 miles on typical country roads with speeds up to 60 mph.

    For the first 60 miles the car ran faultlessly. Then the spanner light kept coming on at very short intervals and the car went into limp mode. If I kept driving the spanner light went out, after probably less than a mile, and normal driving resumed.

    I have read the fault codes as follows:-
    P1105 Barometric Pressure sensor-circuit malfunction
    P0105 Manifold Absolute Pressure/Barometric Pressure Circuit.

    To me that sugests the AtmosphericPressure Sensor is faulty.

    What do you think?

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    Full Member bobssignum's Avatar
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    Default

    Clean the boost sensor (po105) check for leaks in your vacuum hose connectors around your throttle body or on the actuattors(p1105). Also check the manifold hoses for splits , basically excessive air is getting into the system
    While your there you might as well give the EGR a clean as well
    Driving vauxhall,s for 30 + years
    and still loving it

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    Hi

    I have checked the vacuum pipes and hoses and they all look okay.

    Now going to remove and clean the boost rensor.

    Would a faulty/dirty EGR valve give the same fault codes.

    Thanks.

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    Full Member bobssignum's Avatar
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    Default

    It would give the same symptoms but not the same fault codes
    Probably your best course from here is to clean the boost sensor then see what fault codes you still have . like all dti owners you will have to go through the process of elimination scenario , if you need any more help give us a call .
    Last edited by bobssignum; 25th September 2010 at 07:39.
    Driving vauxhall,s for 30 + years
    and still loving it

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    Hi
    I have removed the boost and it was coated in thick oil.The inside of the upper manifold was coated in thick gungy oil so I removed it and cleaned it. The gunge was disgustingly thick and took a lot of scraping and a can of carb cleaner to get clean.

    Rather than clean the sensor I bought a new one.

    I also removed and cleaned the EGR valve which was not too bad.

    I reassembled using all new gaskets and I cleared the fault codes.

    The car now runs with no spanner light and no limp mode running except........

    When I start the car from cold i.e. first thing in the morning the spanner light comes on as soon as I start moving but goes out after about 5seconds, with no fault codes recorded and no loss of power. This happens every time after the car has been idle for a long time.

    It has only started since I carried out the above.

    Has anyone any ideas why the light comes on as it does?

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    Default

    It's most likely one or more of the glow plugs is giving up and needs to be replaced.

    Mine does this but the time it stays on for is getting longer and longer, so I really should replace them soon now!!

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