Skip the auto shop - Our mechanics make house calls

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

asked by on

What does the Master warning light on the dash mean?

A: The Master Warning Light is usually accompa...

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.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 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

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: How do I use child restraints?

There is nothing more important than making sure that a child is safe when driving in your vehicle. Small children should always be in child restraint systems. Since there are so many different child restraint systems, refer to the restraint...

Q: Electrical problems?

Hello, thanks for writing in about your Jeep Patriot. The low voltage condition from the alternator not charging will cause the Totally Integrated Control Module (TIPM) to not work correctly. You should have the battery charged up completely and then...

Q: How do I change the settings?

Your truck allows you to customize some options to better suit your needs as a driver. The Settings section of the message center is where you can change these options. To change the Settings of your Ford F-150. Use...

Related articles

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...
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.