06 f150 w/108k miles. Got home last night and something sounded different from under my truck so I kept it running and took a look. It's coming from my passenger side cat. I drove it today and it sounds like my tail pipe is under water. I'm pretty sure it's clogged because I replaced the driver side cat about a year ago because I heard the rattling sound of the insides but not this time. Any input or advise on my be something other than the cat being clogged that could cause this ? I don't know anything about the sensors but the performance from when I drove just feels like it may be clogged