What to Do If Your Car Will Not Start
Listen to what the car does when you turn the key, because that tells you whether you need a jump, a tow, or just a new battery.
Start with the sound, not the key
If you turn the key and hear nothing at all, or a fast clicking, the trouble is almost always the battery or its connections. If you hear the engine try to turn over slowly and give up, the battery is weak but not dead. If the engine cranks strong but won't catch, the problem is somewhere else, fuel or spark, and a jump won't help.
That sound tells you which of those three situations you're in before you call anyone or open the hood. It also tells you whether this is something you can likely handle at the curb with cables, or something that needs a tow regardless of what you try first.
What the car is telling you
A single click, or no sound at all, usually means the battery has too little charge to engage the starter. Dim or dead dashboard lights point the same way. This is the case where jumper cables or a portable jump pack have the best chance of working.
A slow, groaning crank means there's some charge left but not enough. Try the jump anyway, it often works here too, but get the battery tested soon after because a battery that struggles once will likely do it again.
If the engine turns over normally, sounds strong, and simply won't start, don't bother with a jump. That's not a charge problem. It could be fuel, ignition, or something else that a jump pack can't fix, and running the starter repeatedly can do damage. This is a case for a tow or a mobile mechanic.
A repeating click that isn't the starter at all, sometimes a relay, can sound similar to a dead battery but isn't solved the same way. If a jump does nothing and the lights still work fine, that's a sign to stop and call for help rather than keep trying.
Before you decide how to fix it, think about where you are
If you're in a driveway or a safe parking spot, you have time to work through the battery first. Keep jumper cables or a jump pack in the car, because this situation is common enough that most drivers deal with it eventually.
If you're in traffic, a parking lane, or anywhere unsafe to stay, your first move is to get the car out of the way if you can, and if you can't, put on hazards and call for help rather than working under the hood. Nothing about diagnosing a dead battery is worth doing in a travel lane.
If jump starting works, drive to somewhere you can get the battery or charging system checked rather than assuming the problem is solved. A battery that needed a jump once has told you something, and ignoring it usually means the same problem again, often at a worse moment.
If you have roadside assistance through your insurer, your credit card, or an auto club, this is what it's for. Check your policy or membership for what's covered before you pay out of pocket for a tow or a jump.
Questions people ask about this
How long can a car battery last without starting?
This depends on the battery's age and condition more than any fixed span of time. A battery already weak from age or cold can fail without warning, while a healthy one can sit for a while and still start the car. If the car has sat unused for an extended period, expect the battery to need a jump even if it was fine before.
Why does my car click but not start?
A single repeated click usually means the battery doesn't have enough charge to turn the starter motor. It's different from a slow crank, which means there's some charge but not quite enough. Either way, the battery or its connections are the first thing to check, including whether the terminals are corroded or loose.
Can cold weather stop a car from starting?
Yes, cold reduces a battery's ability to deliver power right when the engine needs the most current, and it also thickens engine oil, making the engine harder to turn over. A battery that works fine most of the year can fail on the first genuinely cold morning. If this keeps happening in cold weather, have the battery tested rather than keep jumping it.
Is it safe to keep trying to start a car that won't turn over?
No, repeated attempts can strain the starter motor and drain what little charge the battery has left. If the first one or two tries don't work, stop and figure out why rather than continuing to crank it. This matters even more if the engine cranks normally but won't catch, since that's not a charging problem at all.
Does roadside assistance cover a dead battery?
Many roadside assistance plans do cover jump starts, but what's included depends on the specific plan, whether through an insurer, a credit card, or an auto club. Check your own coverage for what's included and whether there's a limit on how often you can use it before you assume it's covered.
If this keeps happening, it may be worth comparing what roadside coverage your policy actually includes.
Keep a set of jumper cables or a portable jump pack in the car so you're not caught without one. If the car won't start, listen for which sound you're getting before you decide what to try. If a jump gets it running, get the battery tested in the next few days rather than waiting for it to fail again. If the engine cranks strong but won't catch, don't keep trying the key, call for a tow or a mobile mechanic instead. Check your insurance policy or any roadside membership now, before you need it, so you know what's covered and who to call.
