Quote:
Originally Posted by ROLLGUY
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.
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Thanks, very useful information.
Then I was told wrong by the Mercedes Benz dealer. He told me that the DPF was the #18+19 in this schematic.
Can some of the tubes be clogged and not letting the sensor to read the pressure difference and not allowing the DPF self cleaning not to work?
Anyway, I should then remove and clean or replace the DPF who has the tubes on it, correct?