The other day my car started getting louder and looked to see it has an exhaust leak right at the muffler halfway down the car. I drove down to Virginia from CT, about 450 miles and it got much louder. The engine light just clicked on and is throwing a P0171 left bank too lean code. It bogs down when pressing on the gas off the line. Is this indicative of the exhaust leak? Any advice would be great.