Q: Q: Car won't start in cold weather

asked by on

My Hyundai Elantra doesn't start when the weather got colder, which means it was starting before. I checked the car battery with a multi-meter and got a voltage reading of 12.6V. I jumped started the car, but also didn't work. I put some gas line antifreeze, in case something is frozen in the gas, but didn't work either. Any ideas of what the problem can be?

Thank you.

My car has 174000 miles.
My car has an automatic transmission.

Hello, thank you for writing in. There are a few more basic things to try before worrying too much. One of the main issues is that occurs in cold weather is that weaker components really struggle. One of the most critical for starting is the fuel pump. A very simple step you can do is to turn the key to the "On" position for around 15-30 seconds before attempting to crank over the engine. This gives the cold and heavily used fuel pump a chance to prime before the engine demands it to work. You may also want to help the engine by using a good oil for winter time. Also for winter time, you should make sure your coolant is in good condition and has a low freeze point. Older coolant can loose these properties. Prime the pump before starting and see if that helps. If it does, you may consider switching out the pump.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1,000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!
  1. Home
  2. Questions
  3. Q: Car won't start in cold weather

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: Battery replaced, keeps dying out

If you have a battery that is dying overnight, then you have a major draw on the battery and should have a mechanic isolate what system is causing the draw by removing one fuse at a time until the circuit...

Q: Q: Check engine

Both codes refer to the oxygen sensor that is to the rear of the catalytic converter. With regard to Code P0037, if the rear oxygen sensor is brand new, you should check the heater circuit ground (the oxygen sensor has...

Q: My car is hard to start until I pat the gas - it idles rough

Hello. If you need to continue to apply the accelerator pedal to keep the engine running then it can be caused by a few things. It can be caused by a vacuum leak, a dirty or failing throttle body, or...

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
What Causes Hoses to Leak?
While the largest part of your engine is mechanical, hydraulics plays a significant role. You’ll find fluids at work in a number of different areas. Your car's fluids include: Engine oil Transmission...
How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...