P0424 MERCEDES-BENZ – Heated Catalyst Temperature Below Threshold Bank 1

 

P0424: DIY Repairing Video Tutorial

https://youtu.be/74JmNSYyKMM

Check out nonda Auto DIY Center for more engine error code repairing videos.
https://www.youtube.com/playlist?list=PL-Lyko0O0oxHe1AGvzwAz-wokJPXAtW97

 

P0424 MERCEDES-BENZ Possible Symptoms

  Engine Light ON (or Service Engine Soon Warning Light)  

P0424 MERCEDES-BENZ Possible Causes

  Air leak before catalytic converter,Faulty oxygen sensor,Faulty Catalytic Converter  

P0424 MERCEDES-BENZ Description

  The Engine Control Module (ECM) monitors the switching frequency ratio of heated oxygen sensors 1 (front O2 sensor) and heated oxygen sensors 2 (rear O2 sensor). A three way catalyst converter (Manifold) with high oxygen storage capacity will indicate a low switching frequency of heated oxygen sensor 2. As oxygen storage capacity decreases, the heated oxygen sensor 2 switching frequency will increase. When the frequency ratio of heated oxygen sensors 1 and 2 approaches a specified limit value, the three way catalyst malfunction is diagnosed.