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Mercedes dpf pressure sensor fault

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Mercedes dpf pressure sensor fault

This also explained why we had 0mb on live data as the DPF pressure sensor is a differential pressure sensor, not a back pressure sensor. The difference in pressure pre and post DPF was actually 0. This model of vehicle uses an exhaust flap at the rear of the exhaust to divert exhaust gases via the low pressure EGR valve so this was the next ...

The pressure sensor measures the difference in pressure between the inlet and the outlet of the DPF, the difference in pressure corresponding to the degree of saturation inside the filter. The more the filter is clogged, the higher the voltage (in volts) transmitted by the sensor to the ECU. At a specific voltage, corresponding to the This also explained why we had 0mb on live data as the DPF pressure sensor is a differential pressure sensor, not a back pressure sensor. The difference in pressure pre and post DPF was actually 0. This model of vehicle uses an exhaust flap at the rear of the exhaust to divert exhaust gases via the low pressure EGR valve so this was the next ...Engine light did not come at first. Diagnostics reveal a fault with the DPS but also an unknown fault type 2. According to the AA this may be a recall as the protective gel in the sensor can become contaminated by the exhaust gases.

Apr 11, 2020 · The DPF will always have two small tubes on it, one before, and one after. Both tubes connect to the differential pressure sensor, which senses the pressure difference from the inlet and outlet of the DPF. The DPF may have one or two oxygen sensors on it as well. A catalytic converter does not have the small tubes or pressure sensor. <<See All OBD Codes. The trouble code P2459 can be explicated as Diesel Particulate Filter Regeneration Frequency. If the engine control module would detect a variation in the voltage coming from the diesel particulate filter (DPF) regeneration system delivered performance that is outside the parameters set by the automobile manufacturer, then it would store the P2459 fault code.