1. Clogging: Over time, the catalytic converter can become clogged with carbon deposits, reducing its efficiency. 2. Overheating: Excessive heat can damage the catalytic converter's internal structure, causing it to fail. 3. Contamination: The presence of unburned fuel, oil, or antifreeze in the exhaust can contaminate the catalytic converter, leading to its malfunction. 4. Physical Damage: Road debris or accidents can physically damage the catalytic converter, affecting its performance.
