Hi Riebe123, my name is Alex and I will be answering your question today.
There really is no set mileage to replace a catalytic converter. It depends on a lot of variables. The good news is that your vehicle is constantly checking the efficiency of it's catalytic converter. When your catalytic converter, through normal wear and tear, has deteriorated enough that it needs to be replaced, then your vehicle will illuminate it's Malfunction Indicator Lamp(MIL), also known as your check engine light, and your Power-train Control Module(PCM). Computer will store Direct Trouble Code (DTC) 0420 catalytic converter efficiency below threshold. I hope this helps, and thank you for using 2CarPros, Alex.
Wednesday, January 30th, 2019 AT 1:09 PM