buikki

Hello fellow Chrysler owners. I have a Chrysler Sebring LX from 2003. I recently changed a new engine and new lambdas to it. That´s when the problem started. Every time I have driven 300-400 kilometers (a mile is 1,6 kilometers) the engine warning light lights up. The error codes I get are p0141 and p1684. The lambdas are brand new and they are all similar. Could the catalyst converter be broken? I will appreciate any help, knowledge or suggestion you can provide. Thanks in advance. Otherwise my car is in great condition.