EGR Removal. After deleting the DPF you are also able to delete the EGR Valve, this valve is used to lower the emissions of the car but are often prone for failing. The valve works by recirculating some of the exhaust gases back into the engine through the air intake system, reducing the amount of emissions that exit the car. 1.6 tdi 7343, audi 7343, audi egr valve. Edited Friday, March 15, 2013 4:00:22 PM by motor-mender. REPLY. QUOTE. K And R: Posted Friday, March 15, 2013 5:05:15 PM ... 14:23:34 Readiness: 0000 000 i also did an egr valve changeover flap test in basic settings and the other test for egr which both passed but thought it looked like an egr fault to.