What Signs Indicate a Clogged Catalytic Converter on Kia Grand Carnival?

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What Signs Indicate a Clogged Catalytic Converter on Kia Grand Carnival?

My Carnival feels sluggish once past a certain speed, fuel consumption is up, and sometimes I detect a weird exhaust odor. Could this be a sign of a clogged catalytic converter? What diagnostic steps—like OBD codes P0420–P0434 o r temperature/back‑pressure checks—should I take to confirm this before replacing costly parts?

Talha Kyanii asked on 30 Aug 2025 12:29:50 pm

0 Answers