What indicates a minor exhaust leak?

A minor exhaust leak may not present obvious or severe symptoms, which is why the correct answer is that there may be no visible signs. In many cases, a minor leak is subtle and may only be perceptible through careful observation or through the smell of exhaust fumes, which is not strong enough to indicate a significant problem.

The options that suggest a noticeable exhaust leak or dripping fluids typically reflect more serious issues that would require immediate attention. A faint smell of exhaust could arise from a minor leak, but if it is not detectable visually or audibly, it may still be classified as minor. Therefore, the absence of clear symptoms, along with associated minor indicators, helps in recognizing the presence of a minor exhaust leak.