Q: What does the headlight control sensor do?

asked by on December 14, 2015

What does the headlight control sensor do?

If your car has automatic headlights, then it also has a headlight control sensor. Essentially, this is what’s responsible for turning your headlights on and off based on ambient light levels. The sensor is located on the dash near the windshield in front of the driver’s position. It monitors the amount of light outside through the windshield. When it detects dropping light levels, it turns the headlights on.

Tips

  • Don’t cover your dash with anything as it will prevent the sensor from detecting changes in light level.

  • Don’t cover the sensor itself with anything for the same reason.

  • Clean the dash regularly, but don’t use harsh cleansers or they might damage the sensor.

  • A dirty windshield can contribute to false readings by the headlight control sensor.

Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

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

Car shakes violently when driving past 40mph and pulls to the left

This is something that can happen when tires and wheels are out of balance or the car needs to be aligned. This can also happen when the brake rotors are warped or when the wheel bearings are bad or in...

Why is the check engine light always on?

You are correct that when the Check Engine light is illuminated with no drive symptoms you will not have any indicator if any more problems are happening. That is, unless another light comes on or you get symptoms you did...

my car engine turned off while driving and is now knocking

The first thing I would recommend doing if your engine is making a knocking sound is to check the engine oil level. If the engine oil is low this can cause noises. It is also possible that internal damage to...

Related articles

How to Replace an Exhaust Gas Recirculation (EGR) Temperature Sensor
Exhaust gas recirculation (EGR) temperature sensors monitor the EGR cooler's operation. One is on the exhaust manifold and one is near the EGR valve.
A Buyer's Guide to the 2012 Scion tC
In In general, Scion has been a car manufacturer that continues to climb in popularity. Perhaps no model exemplifies this more than the 2012 Scion tC. Back in 2011, Scion gave this vehicle a facelift and, by the following year,...
A Buyer’s Guide to the 2012 BMW ActiveHybrid 7
The The only thing better than a hybrid car is one that is designed with luxury and performance in mind. The 2012 BMW ActiveHybrid 7 nails it in all of these areas, and considering that it clocks in with a...