My 2003 A6 Is Having A Fuel Pump Relay Issue & I'm Getting It Replaced. Can Someone Tell Me The Price To Change That Out? ..... After Reading Some Reviews On Here, I See It Could Be Bad Sensors Going To The ECU Which Could Tell Fuel Pump Not To Pump. My A6 Starts & Runs Fine, But My Check Engine Light Is On After I Changed The Fuse For The Fuel Pump Relay. Could It Be Bad Grounding Wires Or Bad Sensors Causing The Light To Come On?