Why Did My Car Just Stop?

Man, rear view, checking engine of sports utility vehicle beside rural road

You’re driving along without a problem, and then there’s something that warns you—a shudder in the engine, a check light going on—but it doesn’t show up soon enough. Before you know it, your car has just stopped and you can’t get it running again. What could’ve happened? We’ll give you a few basic problems that can cause engine stalling.

Out of Gas

Surprisingly common, drivers overestimate how much gas they have when the gauge reads “E” and often end up running out of gas. Without fuel, a car can’t run. This may also be a problem if there’s a hole in the fuel line. Your tank will read a certain amount, but the gasoline escapes the vehicle before reaching the engine. It can also be the result of a clog in the fuel line that prevents the engine from obtaining the gas it needs.

Clogged Filters

Part of what makes a combustion engine run is air. If your filters are so clogged that the engine can’t get enough air, it’ll simply stop working. An obstruction in the system can also cause the engine to fail from lack of air.

Exhaust System

The catalytic converter is an important part of your vehicle’s exhaust system. If it becomes clogged, your engine has to work harder to accelerate because exhaust is backing up in the system. This can result in no “get up and go” for your vehicle or cause it to simply shut down.

Overheating

Restricted airflow can also cause the engine to overheat. This may include poor airflow through the radiator, a collapsed hose, a slipping fan clutch or other problems. The overheating could also indicate another problem with the cooling system, and when your engine stops due to overheating, you need to let it cool before trying to start it again to avoid melting piston heads.

If your car suddenly stops while you’re driving, the best option is to pull safely over and call for a tow truck to get your car in for professional attention. An engine failure is a warning about a problem that has to be addressed immediately before you can safely drive again.