lycopersicum
Member
Hello everyone,
Last week I got a P2454 code right after starting to drive, and I could confirm that the DPF pressure sensor was toast, reading a constant 4600 or so mV. Kavlico brand.
I just got a replacement sensor from Hella and installed it. It works but the pressure reading is all over the place -- see attached graph.
If I blow into the rubber tube I can generate a steady signal, so I know it's not the sensor -- the issues has to be somewhere upstream of the rubber pipes. As the pressure sometimes goes below the value with the engine off I wonder if there could be a leak on the high pressure side of the DPF.
I noticed that the seam where the DPF meets the exhaust pipe from the engine is not quite flat (see attached photo). Looks like there is some flaky material at the interface.
Wondering if this could be the issue and if it could have caused the demise of the previous sensor? Any other ideas?
First graph is the old sensor, showing a range of 40mV at idle (ish)
Second graph is the new sensor at idle with more than 100mV variations
Third graph is giving a bit of gas in neutral with the new sensor.
Last week I got a P2454 code right after starting to drive, and I could confirm that the DPF pressure sensor was toast, reading a constant 4600 or so mV. Kavlico brand.
I just got a replacement sensor from Hella and installed it. It works but the pressure reading is all over the place -- see attached graph.
If I blow into the rubber tube I can generate a steady signal, so I know it's not the sensor -- the issues has to be somewhere upstream of the rubber pipes. As the pressure sometimes goes below the value with the engine off I wonder if there could be a leak on the high pressure side of the DPF.
I noticed that the seam where the DPF meets the exhaust pipe from the engine is not quite flat (see attached photo). Looks like there is some flaky material at the interface.
Wondering if this could be the issue and if it could have caused the demise of the previous sensor? Any other ideas?
First graph is the old sensor, showing a range of 40mV at idle (ish)
Second graph is the new sensor at idle with more than 100mV variations
Third graph is giving a bit of gas in neutral with the new sensor.
- Model
- Ducato 2.3 Euro5
- Year
- 2013
- Mileage
- 190000
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