Dpf Differential Pressure Mbar. We changed b28/8 sensor, check cables resistance to ecu = 0,7 ohms all three cables, and check the two small tubes to dpf for leaking all good like new, made two. Particle filter pressure diff 3mbar engine 1800rpm exhaust flow 28.72g/s flow of gas inside the particle filter 112.5m3/h particle filter pressure diff 3mbar my wife has a scenic 1.5 with a dpf and i checked the live status on her car , the particle filter pressure sensor fluctuates between 5mbar to 35mbar under acceleration.
Testing the differential pressure sensor for accuracy the diesel particulate sensor (dpf) measures pressure before and after the dpf filter, the residual pressure, and atmospheric pressure. It now looks like the dpf is rstricting exhaust flow too much, i contacted i firm which does clean dpf and they said their specification for a honda dpf was 11 mbar of differential pressure at 276 cubic meters airflow per hour. Car is w204 om651 with 87.000 km, the fault is p244a7a differential pressure to low and car gets in limp mode, this happens always that car pass 2000 rpm under 2000 no problem.
The signal of the sensor is not sufficient to determine an optimized timing for regeneration of the dpf. 493 mbar particulate filter clogging: A blocked dpf will have a positive pressure in front of the dpf filter.
Testing the differential pressure sensor for accuracy the diesel particulate sensor (dpf) measures pressure before and after the dpf filter, the residual pressure, and atmospheric pressure. Answer was 10/11 mbar off and approx 21/24 mbar at. Rectify leaks empty condensate trap pressure sensor defective sensor test with test pump at 200 mbar continuous increase of back pressure:
A static regen after replacing the dpf pressure sensor seemed to remove the dpf warning light (it only came on after replacing the sensor). But i'd still suggest further investigation, it could be the dpf but it could be a pressure sensor. Serious restriction probably not allowing car to do a forced regen:
It now looks like the dpf is rstricting exhaust flow too much, i contacted i firm which does clean dpf and they said their specification for a honda dpf was 11 mbar of differential pressure at 276 cubic meters airflow per hour. 266 mbar particulate filter clogging: Make sure both your pressure sensors are ok before accusing your dfp.
I watch the pressure at idle as an indicator, and normally see anywhere between 0 and 5 mbar at idle (there is also a dpf pressure offset value that gets reported.) i watch this from time to time under the notion that if the dpf were to clog up with too much ash, the pressure at. I am suspicious this is too high, particularly as 102.4 (differential pressure offset particulate filter) reading is consistently 7 mbar. Brilliant dpf causing almost no restriction:
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