Can a Clogged Catalytic Converter Cause Engine Sputtering?

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Can a Clogged Catalytic Converter Cause Engine Sputtering?

If the catalytic converter is clogged, exhaust gases can’t flow properly, leading to sputtering. Have you checked your catalytic converter when facing this issue?

Sirat Ul Jinan asked on 11 Feb 2025 11:55:15 am

1 Answer

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Car Mechanic Expert - on 11 Feb 2025 12:02:15 pm

Yes, a clogged catalytic converter can cause sputtering, loss of power, and poor acceleration due to restricted exhaust flow. Many Hilux owners facing this issue have noticed symptoms like overheating, reduced fuel efficiency, and a sulfur-like smell. Some have resolved it by using catalytic converter cleaners, while others had to remove and manually clean o r replace it. Checking for excessive backpressure o r using an OBD-II scanner to detect efficiency-related trouble codes can help diagnose the issue. Have you tried any of these methods to fix your catalytic converter?