Just an update, the small thermostat on the EGR cooler was faulty and had caused the dpf to block up again. Replaced thermostat and took
off dpf, cleaned it and then took it for a good spin. Two months on and it still going great
Message Thread BMW E61 530 2005 - DPF system fault - Fixed # - Liam Hourihan February 19, 2013, 12:03 am
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