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Message: <blockquote data-quote="manjohari" data-source="post: 544008" data-attributes="member: 23955">how about dpf (diesel) = catalytic converter (petrol)maybe some ecu mapping needed to provide correct reading for car without dpf.there's a sensor connect back to ecu which control the engine that produces emmision (oxygen sensor i think) for catalytic converter.it may have similar purpose for dpf, err.. i think dpf can't filter out euro2 diesel to provide expected ecu reading from the sensor, that's why it's removed.i tend to agree with supersonic, it's not tuned, but may be modified to remove sensor reading from dpf and avoid error code.one reason tuner modified ecu setting to provide more power to the engine and trade off for higher emmision output.</blockquote>