Skip the auto shop - Our mechanics make house calls

What Does the Frost Warning Light Mean?

What Does the Frost Warning Light Mean?

Auto makers know that driving in the winter can be dangerous. Fog and rain can reduce your visibility, but even worse, the ice can make roads so slippery that they are almost undriveable at normal speeds. To help keep drivers safe and more aware of their surroundings, car manufacturers have started including a frost warning light on the dashboard. This warning light is controlled by a temperature sensor located around the front bumper, away from the heat of the engine. When the outside air passing over the sensor reaches a certain temperature, the computer turns on the warning indicator on the dashboard and warns the driver of potential frost on the road.

What the frost warning light means

There are 2 stages to this light being illuminated depending on the temperature outside. The light first turns on when the outside air starts to reach freezing temperatures, around 35° F. Even though water usually starts freezing at around 32° F, this warning light will turn on before that point to warn the driver that ice may start forming. In this stage, the light will be amber in color. As temperatures get lower and lower, the light will turn to red to indicate that the outside temperatures are below freezing and that ice is a real possibility.

Is it safe to drive with the frost warning light on?

As long as you pay attention to the light and use caution while driving, you can continue on your journey. This warning should not be ignored as ice poses a real threat to your safety on the road. It’s also very important that you have the correct type of tires for your environment. All season tires work pretty well in the winter, but if you live in an area with heavy snow fall, it might be worth it to invest in a set of snow tires.

If you think there is an issue with your frost warning system, get one of our certified technicians to help you investigate and determine the cause.

The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
Icon-warranty_badge-02

Skip the repair shop, our top-rated mechanics come to you.

At your home or office

Choose from 600+ repair, maintenance & diagnostic services. Our top-rated mechanics bring all parts & tools to your location.

Fair & transparent pricing

See labor & parts costs upfront, so you can book with confidence.

12-month, 12,000-mile warranty

Our services are backed by a 12-month, 12,000-mile warranty for your peace of mind.

Get A Quote

Need Help With Your Car?

Our certified mobile mechanics make house calls in over 2,000 U.S. cities. Fast, free online quotes for your car repair.

GET A QUOTE

More related articles

P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...
How to Buy Fuel Treatments
Adding a fuel additive to your gas tank when you fill up is one way to clean vital engine parts of deposits, improve the performance of your engine,...
Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...


Related questions

Q: Severe damage to rim impacting brake system

Wow, a rim failure like that can be a scary issue. It is recommended that you call GM customer service and file a report with them since your car is still most likely under warranty. They may send a rep...

Q: ABS light turns On and Off.

Hi there. It could be a mechanical problem, such as the tie rod or a broken CV joint that is causing this issue. When the inner portion of the tire does not touch the ground, that's known as a negative...

Q: Do its fuel injectors need to be cleaned and if they do, is there an effective way to clean them without removing them??

Hi there. This could be a faulty MAF (mass air flow sensor), which regulates the air going into the engine allowing for the proper air/fuel mixture. This could also be related to the idle air control module. This also helps...