The clamp cover the crack on the hose and was undetectable so see the crack on the hose. That can given to many codes like P0300 misfire, air leak, p0430 malfuntion on bank 2 cat manifold. Also, p0420 O2 Sensors. So, before buy parts check this hose and another one very close to this one in U form to see if you have any crack or air leak on it. Simple and inexpensive fix. Lest of $10.00