Persistent P0420 Error and Knocking Noise in Opel Mokka Despite Changing Catalyst and Lambda Sonda
I'm experiencing a persistent P0420 error code and a clicking/knocking noise from the engine of my Opel Mokka, even after changing the catalyst and lambda sonda. The check engine light is also on. Has anyone else experienced this issue or have any suggestions on what could be causing this and how to fix it?
1 comment(s)
CarlyMechanic
Check for any exhaust leaks before the catalytic converter, as they can cause a P0420 code and unusual engine noises. Ensure all connections and gaskets are secure. Let me know if this resolves the issue or if you need further assistance.
CarlyMechanic
Check for any exhaust leaks before the catalytic converter, as they can cause a P0420 code and unusual engine noises. Ensure all connections and gaskets are secure. Let me know if this resolves the issue or if you need further assistance.