cliffordingles
New Member
Hey so my liberty is an 04' 5 speed with the 2.4L. Has 106k miles. Its been popping the P0420 code for a few days. I replaced the upstream O2 yesterday, cleared the code and it came back. Than i replaced the PCV and the CEL came back again. Today i did the downstream O2, cleared the code and it came back. Im hoping to not have to drop a ton of money for a new cat, anyone have any advise? Thanks!