What might be a result of ignoring corrosion during an exhaust inspection?

Ignoring corrosion during an exhaust inspection can lead to a decrease in fuel efficiency. Corrosion can create openings or leaks in the exhaust system, which allows exhaust gases to escape before they can properly exit through the exhaust system. When this happens, the engine may work harder to expel its exhaust, leading to a reduction in overall efficiency. Additionally, any loss of back pressure caused by corrosion can disrupt the ideal operating conditions of the engine, resulting in poorer fuel combustion and increased fuel consumption. This ultimately affects the engine's performance, making it less efficient and increasing operating costs due to higher fuel usage.

While increased engine temperature and other factors can also be associated with exhaust issues, the direct link between corrosion leading to fuel efficiency loss is more evident in this scenario.