Texas CDL General Knowledge Practice Exam 2025 - Free CDL Practice Questions and Study Guide

When a truck driver notices a warning light indicating engine trouble, the most appropriate action is to pull over safely and investigate the warning. This is the best course of action because ignoring the warning light could lead to more serious engine problems, potentially resulting in breakdowns, accidents, or costly repairs.

Pulling over allows the driver to assess the situation in a safe environment, minimizing risks to themselves and others on the road. Once stopped, the driver can check for obvious issues, consult the vehicle's manual for guidance on the warning light, or determine if it's safe to continue driving or if assistance is needed.

Continuing to drive with an engine trouble warning could exacerbate the issue, and contacting a mechanic while in motion might distract the driver from road safety or lead to dangerous situations. Turning off the engine immediately may not always be advisable depending on the circumstances, as this can sometimes lead to a loss of steering or braking power while the vehicle is still in motion.