Q: What does the Master warning light on the dash mean?

asked by on December 14, 2015

What does the Master warning light on the dash mean?

Warning Light is on Inspection $79.99 - $89.99 Get a Quote

The Master Warning Light is usually accompanied by another warning light, and indicates that one or more warning systems have been detected. The Master Warning Light ranges in its levels of significance and severity. It is important to check your vehicle before operating it, to try and determine the cause of the Master Warning Light. If you are unable to make a determination as to the cause of the Master Warning Light, it would be a good idea to have it diagnosed to check if there is a serious issue present that needs to be addressed immediately.

Dashboard indicator lights and their meaning may differ depending on the make and model of a vehicle, but the following are some potential reasons for why the Master Warning Light may be on in the dashboard:

  • Low tire pressure
  • Low fuel
  • Low washer fluid
  • Low coolant
  • Low battery voltage
  • A door is ajar
  • The parking brake is still engaged
  • Headlights have been left on
  • The fuel cap is loose or missing

If you are having trouble figuring out why this light is on, you can have a certified mechanic, such as one from YourMechanic, diagnose your Master Warning Light to have this issue resolved.

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

What others are asking

Speedometer is erratic and the S light is on

There are a few different components that can cause these issues. The main one is the vehicle speed sensor (VSS). This is located on your transmission, and communicates to the engine what speed the transmission is receiving. The VSS also...

My abs light is on and my brake pedal goes to the floor.

Since the master cylinder is full and the brake pedal is going to the floor, there is a good chance the master cylinder has failed or there is a leak somewhere along the braking system. This leak may be found...

"Charge Malfunction"

It sounds like there is a problem with the drive belt. It drives the alternator, water pump, and power steering pump. The belt may have broke, or some fluid leaked onto it causing it to slip. If the belt broke,...

Reduce oil level warning

Hello. It sounds like the oil is thinning out due to the heat of the engine when the car is operating at high speeds. This will result in the low oil sensor giving a false reading. There could also be...

Last night I was driving home and I heard this knocking noise, a minute later the noise went away and my check engine light came on.

Hi there. The noise you heard could have been the engine knocking due to a lack of engine oil. If the brake pedal is pressed and the oil light comes on, then the oil level could be low causing the...

The fuel gauge is not working.

As you may know, your car has a fuel sending unit inside the fuel tank that operates on a float system. This monitors the level of the fuel in the tank using a float that relays these levels back to...

Stablity control warning light on constantly

I agree that technology breeds a love and hate relationship, my advice is to concentrate on the loving and leave the hate behind. The issue with your vehicle may be a somewhat straightforward repair. GMC is aware of a corrosion...

Honda CRV 2005 VSA light on car is shaking while driving

Hello, thank you for writing in. The VSA (vehicle stability assist) light comes on steadily when there is a problem. If it blinks, it means the system is actively working to control the car and help it steer. If the...

How do I adjust the terrain management?

The terrain management allows you to choose the best driving mode for your vehicle: Normal, Mud/Ruts, Sand, and Grass/Gravel/Snow. To set the mode, rotate the Terrain Management knob to the desired setting. Be sure to rotate the knob back to...

Related articles

4 Essential Things to Know About Winter Driving
Driving in snow is different than how you normally drive. Drive more slowly, keep your car clean, and use your car equipment carefully to stay safe.
Is it Safe to Drive With a Misfiring Cylinder?
An engine misfire can be caused by bad spark plugs or imbalanced air/fuel mixture. Driving with a misfire isn't safe and can damage your engine.
Is it Safe to Drive With a Radiator Leak?
The radiator helps to keep your engine cool. If your radiator is leaking, coolant will be lost and the engine will have the potential...