Grand Blanc Mitsubishi
New Mitsubishi and used vehicles of every make, right here at 5470 Ali Drive.
Browse Inventory
Battery & Electrical
Car Won't Start in Cold Weather
You turn the key on a freezing Grand Blanc morning and the engine won't catch. Here's what's likely happening under the hood, and what to do about it before your next cold snap.
What’s Going On
What's Actually Going On
Cold air makes it harder for your engine to start for two reasons at once. The engine oil thickens as the temperature drops, so the starter has to work harder just to turn the engine over. At the same time, the chemical reaction inside your battery that produces power slows down in the cold, so the battery has less usable energy right when the engine needs the most.
A battery that cranks your car every day in warmer months can struggle once winter sets in, even though nothing about it has technically failed yet. Cold exposes a weak battery before mild weather ever would, which is why so many no-start calls come in during the first hard freeze of the season.
If your car won't start in the cold, the cause is usually one of three things: a battery that's lost too much of its cold-cranking capacity, a loose or corroded connection at the battery terminals, or a starter or charging system issue that's been masked by warmer weather. Figuring out which one it is takes a real test, not a guess.
How Urgent Is It?
How Urgent Is This?
A car that won't start in cold weather isn't an emergency the way a brake failure is — if your car is parked safely, it can sit until you're able to get it looked at. But it's worth taking seriously, because a battery that struggles once in the cold usually struggles again, often at a worse moment.
Try not to keep cranking the engine over and over if it isn't catching. Repeated attempts pull the battery down further and can turn a marginal battery into a fully dead one. If a jump start gets you going, treat that as a sign to get the system checked soon, not as a fix in itself.
What to Expect
What We'd Do About It
Test the Battery and Charging System
We start with a load test that measures how much power your battery can actually deliver under cold-start conditions, along with a check of the alternator to confirm it's recharging the battery properly while you drive.
Check Terminals, Cables, and Connections
Corrosion and loose connections at the battery terminals are common in Michigan winters and can mimic a bad battery. We inspect the cables and connection points and clean or tighten anything that's interfering with a strong connection.
Confirm the Starter Is Doing Its Job
If the battery and connections check out, we test the starter itself. This tells us whether the no-start is a starting-system issue rather than a power issue, so you're not paying to replace the wrong part.
Questions
Straight Answers
Why does my car start fine most of the time but not on the coldest mornings?
This usually means your battery is losing capacity but hasn't failed completely. A healthy battery has extra reserve power built in, so it can still start your car in mild weather even as it weakens. Cold removes that cushion because the battery has less usable power to begin with, so a battery on its way out often shows its first real symptoms on the coldest days of the year rather than gradually.
Is it safe to jump-start my car in freezing temperatures?
Yes, jump-starting is generally safe in cold weather as long as you connect the cables in the correct order and avoid letting the clamps touch each other. Connect the positive terminals first, then the negative cable to a grounded metal surface on the dead vehicle rather than directly to the battery. If you're not comfortable doing it yourself, that's exactly the kind of thing we can help with.
How do I know if it's the battery or something else?
The sound your car makes when you turn the key is the biggest clue. A slow, labored crank usually points to a weak battery. Rapid clicking with no crank at all often points to a different issue, like a loose connection or a starter problem. Silence with no sound whatsoever can mean a dead battery, a blown fuse, or a bad connection. A proper diagnostic test is the only way to know for certain.
Should I warm my car up before driving on cold mornings?
Modern engines don't need long warm-up periods sitting in the driveway the way older cars did — driving off gently after starting is generally fine. What actually helps your battery is minimizing how long it has to crank the engine in the first place, which is one more reason to have a marginal battery tested before winter really sets in.
Get Ahead of the Next Cold Snap
If your car has been slow to start, don't wait for the next hard freeze to find out why. Call (810) 570-2030 or schedule a battery and starting system check at our Grand Blanc shop.
Also From the Lasco Family
Shopping for a Vehicle, Not a Repair?
Two Lasco stores, both a short drive away.
Lasco Ford — Fenton
New Ford trucks and SUVs, 35+ years in business, two-time Ford President’s Award winner.
Visit Lasco Ford