spawomir Posted January 26 Report Share Posted January 26 Title: P2002 Error – DPF mechanically cleaned, problem keeps coming back – any ideas? Hi everyone, I’m having an ongoing issue with the DPF in my Dodge (Volkswagen 2.0 CRD engine, 167k miles), and I’m hoping someone can point me in the right direction. For the past few months I’ve been struggling with error P2002 (DPF Efficiency Below Threshold). First, a mechanic friend cleaned the DPF without removing it — that only helped for a few weeks. Then I paid for a full mechanical DPF removal and cleaning. It wasn’t cheap, but again the fix only lasted about 4 weeks while driving mostly in town. Two days ago I took the car on a longer trip and after about 200 km the P2002 error came back, as if the DPF was clogged again. I’m wondering: How is it possible that after a full mechanical cleaning the problem returns so quickly? Could something else be causing this, like a faulty differential pressure sensor, EGR issues, turbo problems, or incorrect regeneration? What are my options now — another cleaning, regeneration, replacing some sensors, full DPF replacement? Has anyone experienced something similar with the VW 2.0 CRD engine and found the real cause? Any suggestions would be greatly appreciated — I’ve already spent quite a bit and don’t want to keep cleaning the DPF if something else is actually causing the issue. Thanks in advance! Quote Link to comment Share on other sites More sharing options...
5rebel9 Posted January 26 Report Share Posted January 26 This type of situation I will only say that hopefully some of our euorpean members on your side of the "pond" can help you out since we North American members did not get to have the Diesel version. Good Luck and make sure you keep us updated on this, even to say to satisfy our "curiosity" over here. jkeaton 1 Quote Link to comment Share on other sites More sharing options...
Dean H Posted January 27 Report Share Posted January 27 Found this for your code: The Diesel Particulate Filter is an in-line canister filter located in the exhaust system between the engine and the muffler. This filter captures and stores soot and ash particles created by the diesel combustion process. The Diesel Particulate Filter is monitored by the Powertrain Control Module (PCM) with the Differential Pressure Sensor. This sensor measures the exhaust pressure before and after the particulate filter through tube connections directly on the exhaust pipe. Hoses run from the tubes to the Differential Pressure Sensor. As ash and soot accumulate in the filter, the exhaust pressure at the inlet side of the filter increases as compared to the pressure at the outlet side of the filter. Code sets- The Powertrain Control Module (PCM) detects incorrect exhaust flow through the particulate filter during certain engine operating conditions. Possible Causes DAMAGED EXHAUST SYSTEM LEAKING EXHAUST SYSTEM HIGH RESISTANCE IN EXHAUST DIFFERENTIAL PRESSURE SENSOR CIRCUITS HOSE/TUBE CONNECTIONS TO THE EXHAUST DIFFERENTIAL PRESSURE SENSOR Exhaust Differential pressure sensor Diesel particulate filter Quote Link to comment Share on other sites More sharing options...
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