What does a check engine light look like?
What does a check engine light look like? The sound may be a true knock--a hollow sound--or a rattling noise. Engines with cooling-system issues or uneven combustion may develop a pinging sound. No matter what it sounds like, engine knock indicates a real problem. You should never ignore a loud engine. The "check engine" light may be the most misunderstood light on the dashboard. How to reset the Check Engine light on your car? How to Reset the Check Engine Light. 1 Drive Till it Turns Off. This is the easiest way. Your vehicle’s sensors will generally recheck the problem...