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Problem with fault code P0420 on Peugeot 208

Hi, I have a Peugeot 208 and recently the engine light came on. When running a diagnostic, I got the fault code P0420. Could someone help me understand what this code means and how can I fix it? Thank you.

(Translated from Spanish)

Summary of the thread

The P0420 fault code on a Peugeot 208 signifies that the catalytic converter is not operating efficiently. Possible causes include exhaust leaks before the catalytic converter or faulty oxygen sensors. Solutions involve checking for and repairing any exhaust leaks and inspecting the oxygen sensors for faults.

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1 comment(s)

CarlyMechanic

The P0420 code indicates that the catalytic converter is not functioning as efficiently as it should. Start by checking for any exhaust leaks before the catalytic converter, as this can affect its performance. If there are no leaks, inspect the oxygen sensors, as a faulty sensor can also trigger this code. Let me know how it goes or if you have any further questions!

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PEUGEOT

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208