What does excessive carbon buildup in the exhaust system lead to?

Excessive carbon buildup in the exhaust system primarily leads to reduced engine power. This occurs because carbon deposits can block the exhaust flow, which in turn creates back pressure in the engine. When back pressure increases, it can impede the engine’s ability to expel exhaust gases efficiently. As a result, the engine cannot draw in fresh air and fuel mixture optimally, resulting in lower power output.

Furthermore, the buildup of carbon can also affect components such as the catalytic converter, potentially leading to increased emissions and further efficiency issues. Proper exhaust flow is crucial for optimal engine performance, so any obstruction caused by carbon deposits can significantly detract from the vehicle's power and overall performance.