Hi, 2009 Mazda 6 2.2D (117K) with EML on. Codes P0106 & P0299 were cleared last week by a friend with a code reader. Light back on with code P0299. Car not running any different but have had a long standing problem with lack of power. My local garage thought this was related to DPF but I am doubtful of this (No DPF light on). Any ideas before I have to go to Mazda?