The crossword solution for the term ENGINE PROBLEM is STALL, which is a five-letter word. A STALL is a situation in which an engine stops running or working properly, usually due to a lack of fuel or air. This can be caused by a variety of issues, such as a clogged fuel filter, a faulty spark plug, or a broken timing belt. In some cases, a STALL can also be caused by a mechanical issue, such as a worn out part or a damaged component.