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Thread: Blocked exhaust

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    Default Blocked exhaust

    My 2006 150BHP Vectra has a blocked DPF. I can clean it, have it service regenerated and the back pressure is perfect. However when I drive about 100 miles (motorway not slow driving) the spanner light comes on and P1901(75) is logged. When I check the pressure is 70 - 80 kpa (should be 10 or so). It has had new injectors, air mass meter, egr valve, dpf filter, manifold pressure sensor. Does not use oil & fuel consumption is good (45+ on a run). What can it be?

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    what about the same diff.pressure sensor that is giving 70-80kPa ? is the sensor OK. If you replace it, dont forget to let the ECM know that you replaced the sensor. It has to be programmed as is necessary with dpf replacement.
    what does the P1901(75) say?

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