METZGER 0892738 EGR Module Particulate Filter, with seal, with clamp, with EGR valve, Control Unit/Software must be trained/updated 0892738 | Order now!
Jetta TDI 2.0l EGR how it works where the valves are P401 P2002 P0401 codes - YouTube
Investigation of the combustion of exhaust gas recirculation in diesel engines with a particulate filter and selective catalytic reactor technologies for environmental gas reduction - ScienceDirect