:( I could use some help with my 2008 Jeep Commander 5.7 Hemi with the P0153 code constantly coming on after less than 40kms of driving. Since Oct 2011 I have been having the P0153 code coming up first as an occassional code which has now become a regular code which quickly reappears after...

So while driving home today after a family reunion :ohyeah: the check engine light came on. I checked the code and it was a p0420. After a little searching it appears to be "420 The catalyst seems inefficient (#1)". Has anyone else had this code? I guess I could use this as a reason...