Hi all im new in this forum i just come acros and i decided to register and ask qa question and hopefully to get some advice had my audi a3 2005 for three years never had problems now im havin problem with losin power white smoke comes when i move of i was tild there was a leak on tubo pipes i spend more than 400 poud an still they haven’t fixed the issue now im having engine light on i done the diagnostic now they found two codes egr valve fault i got ut today from eBay hopefully is this the problem and the garage is charged me 200 pound to fix it as its a ling hard job he said to remove it as it is on the back of the engine can anyone advise me what is if this doesn’t fix the issue thanks