Hello fellow Chrysler drivers

I own a Chrysler Sebring LX from 2003. I recently changed a new engine and lambdas to it. Thatīs when the problems began. Everytime I have driven 300-400 kilometers (200-260 miles) the engine warning light lights up. The error codes I get are p0141 and p1684. The lambdas are all similar and brand new so it cannot be the lambdas. Could the catalyst converter be broken?
I will highly appreciate any of your help, knowledge or suggestions. Thanks in advance.

 

If you have any brand other than OEM Mopar, NGK/NTK sensors they will not work in a Chrysler vehicle. Very common that Bosch and other brands of 02 sensors cause problems and throw codes.
1684 is a battery disconnect code that usually is meaningless. Check all Battery positive and negative connections.

 

Thank you Sir!
The new lambdas of my car are made by Bosch. I have to replace them. Problem solved I suppose.