What Do the Warning Lights on Your Dashboard Mean? A Driver’s Guide
You're driving down the road when suddenly a light appears on your dashboard.
Maybe it's the familiar check engine symbol. Maybe it's a tire pressure warning. Or maybe it's a symbol you've never seen before and have absolutely no idea what it means.
Should you pull over immediately? Can you keep driving? Is something actually wrong with your vehicle?
Modern cars, trucks, and SUVs use dashboard warning lights to alert drivers to everything from low tire pressure to potentially serious engine problems. While some lights are simply reminders, others indicate an issue that should be addressed as soon as possible.
For drivers in Fort Wayne and throughout Northeast Indiana, understanding these symbols can help you respond appropriately when one appears.
At The Auto Brokers on Lima Road, we know vehicles have become increasingly advanced, and dashboards can sometimes feel like they have a symbol for everything. That's why we've put together this guide to some of the most common dashboard warning lights and what they may be trying to tell you.
One important note before we get started: dashboard symbols and their meanings can vary between manufacturers and models. Your vehicle's owner's manual should always be your primary resource for information about a specific warning light.
Why Do Dashboard Warning Lights Come On?
Modern vehicles contain numerous sensors and computers that continuously monitor different systems.
When the vehicle detects something outside of its expected operating range, it may illuminate a warning light to let you know.
Some dashboard lights appear every time you start your vehicle and disappear within a few seconds. That's normal. Your vehicle is performing system checks before you begin driving.
The time to pay attention is when a warning light remains illuminated, appears unexpectedly while driving, or begins flashing.
The color of the light can sometimes give you an idea of its urgency.
Generally, red warning lights may indicate a more urgent issue, while yellow or amber lights often indicate something that should be inspected soon. Green, white, or blue symbols are frequently informational, such as indicating that headlights or another feature are active.
However, these are general guidelines. Always check your owner's manual for the exact meaning of a symbol in your vehicle.
1. Check Engine Light
The check engine light is probably one of the most recognized and misunderstood dashboard warnings.
It usually looks like a small engine and may also be accompanied by words such as "Check Engine" or "Service Engine Soon."
The tricky part is that a check engine light can be triggered by many different issues.
Possible causes can range from relatively simple problems to more significant engine or emissions-system concerns.
A loose or damaged gas cap can sometimes trigger the light. Other causes may involve sensors, ignition components, emissions equipment, fuel delivery, or other engine-management systems.
Solid vs. Flashing Check Engine Light
How the light behaves matters.
A solid check engine light typically indicates that the vehicle's computer has detected a problem that should be diagnosed.
A flashing check engine light can indicate a more serious problem that may potentially cause damage if you continue driving.
If your check engine light begins flashing, particularly if the vehicle is running poorly, shaking, losing power, or making unusual noises, you should avoid continuing to drive unnecessarily and have the vehicle inspected.
The important thing is not to guess.
A diagnostic scan can retrieve trouble codes stored by the vehicle's computer and provide a starting point for identifying the problem.
2. Tire Pressure Warning Light
If you've driven in Indiana for very long, you've probably seen the tire pressure monitoring system, or TPMS, light at least once.
The symbol generally resembles a tire with an exclamation point inside.
It means that the vehicle has detected low pressure in one or more tires or, in some cases, a problem with the tire-pressure monitoring system itself.
This light is particularly common when temperatures drop.
As outside temperatures decrease, tire pressure can decrease as well. That means the first cold mornings of fall and winter can suddenly cause a TPMS light to appear even if the tires seemed fine a few days earlier.
Don't simply ignore it.
Check the pressure in all four tires and compare it with the recommended tire pressure listed by the vehicle manufacturer, often found on a label inside the driver's door jamb.
Also inspect the tires for visible damage.
If one tire is significantly lower than the others, you could have a leak or puncture rather than a simple temperature-related pressure change.
3. Oil Pressure Warning Light
The oil pressure warning light usually looks like an old-fashioned oil can.
This is one warning you should take seriously.
Your engine relies on oil circulating under proper pressure to lubricate internal components. If the oil pressure becomes too low, continuing to run the engine can potentially result in severe damage.
If the oil pressure warning appears while you're driving, find a safe place to stop and turn off the engine.
The issue could involve low oil, an oil leak, an oil pump problem, a sensor issue, or another condition affecting lubrication.
Do not assume that simply adding oil will solve the problem. Check the vehicle's oil level according to the manufacturer's instructions and seek professional assistance when necessary.
4. Battery Warning Light
The battery warning light usually looks like a rectangular battery with positive and negative symbols.
Despite the name, this light does not necessarily mean the battery itself is bad.
Instead, it typically indicates a problem with the vehicle's charging system.
Possible causes can involve the battery, alternator, wiring, connections, belts, or other charging-system components.
If the charging system stops working correctly, your vehicle may continue running temporarily using power stored in the battery. Once that power is depleted, however, the engine may shut off and may not restart.
If the battery light comes on while driving, avoid unnecessary electrical use and have the charging system inspected as soon as practical.
5. Engine Temperature Warning Light
The engine temperature warning light often looks like a thermometer sitting in liquid.
This warning indicates that your engine may be overheating.
An overheating engine can result from several problems, including low coolant, a coolant leak, cooling fan problems, thermostat issues, water pump problems, or other cooling-system failures.
If the temperature warning appears, do not continue driving as though nothing is wrong.
Find a safe location to stop and turn the vehicle off.
And be careful around an overheated cooling system. Never remove a radiator cap from a hot engine because the cooling system can be under pressure and extremely hot coolant can cause serious burns.
6. ABS Warning Light
ABS stands for anti-lock braking system.
The ABS warning light typically displays the letters "ABS" inside a circle.
Anti-lock brakes are designed to help prevent the wheels from locking during hard braking, allowing the driver to maintain greater steering control in certain situations.
If the ABS light stays illuminated, the vehicle may have detected a problem with that system.
Your conventional brakes may still operate, but the anti-lock feature may not function as intended.
Because braking is critical to vehicle safety, an ABS warning should not simply be ignored.
If the ABS light appears along with other brake-related warnings or you notice changes in braking performance, have the vehicle inspected promptly.
7. Brake Warning Light
A brake warning may appear as the word BRAKE, an exclamation point inside a circle, or another brake-related symbol.
Sometimes the explanation is simple: your parking brake is still engaged.
If the parking brake is completely released and the warning remains illuminated, however, the light could indicate another issue with the braking system.
Depending on the vehicle, it may relate to brake fluid levels or another braking-system condition.
If a brake warning appears while you're driving and you notice a soft brake pedal, reduced braking ability, unusual noises, or other changes in braking performance, stop driving when it is safe to do so and seek assistance.
8. Traction Control and Stability Control Lights
A symbol showing a vehicle with squiggly lines underneath typically relates to traction control or electronic stability control.
Unlike many warning lights, seeing this symbol briefly while driving does not always mean something is wrong.
For example, if you're driving on a snowy Fort Wayne road and your tires begin slipping, the light may flash to indicate that the traction-control system is actively working.
That's normal.
If the light stays illuminated continuously, however, it could indicate that the system has been manually disabled or that the vehicle has detected a problem.
This feature can be particularly useful during Indiana rain, snow, and ice, so an ongoing warning is worth investigating.
9. Airbag Warning Light
The airbag warning light often shows a seated passenger with a circle in front of them.
If the light remains illuminated after startup, there could be an issue involving the vehicle's supplemental restraint system.
That system can include airbags, sensors, seat belt pretensioners, wiring, and related components.
An illuminated airbag warning may mean that some portion of the system may not operate as intended during a collision.
Because airbags are an important safety feature, this warning should be professionally diagnosed rather than ignored.
10. Low Fuel Warning Light
This one is easy.
The fuel pump symbol indicates that your fuel level is getting low.
But there's a small feature many drivers overlook.
On many vehicles, there is a small arrow next to the fuel pump symbol. That arrow typically points toward the side of the vehicle where the fuel door is located.
If you've recently switched vehicles or are driving something unfamiliar, that tiny arrow can save you from pulling up to the wrong side of the gas pump.
11. Washer Fluid Warning
A windshield-shaped symbol with a spray or dotted pattern generally means your windshield washer fluid is low.
This isn't typically an emergency, but it shouldn't be forgotten, particularly during an Indiana winter.
Road salt, slush, snow, and dirty water can quickly coat a windshield. Having enough washer fluid can make a significant difference in visibility.
During colder months, make sure you're using washer fluid designed to operate at freezing temperatures.
12. Coolant Level Warning
Some vehicles have a separate warning for low coolant level in addition to the engine-temperature warning.
Coolant helps regulate engine temperature.
If the level is low, there could simply be insufficient coolant in the system, or there may be a leak that needs attention.
Never open a hot cooling system to check the coolant. Allow the engine to cool and follow the instructions in your owner's manual.
Repeatedly needing to add coolant can indicate a problem that should be inspected.
13. Low Oil Level vs. Low Oil Pressure
These warnings are easy to confuse.
Some vehicles can separately monitor oil level and oil pressure.
Low oil level means there may not be enough oil in the engine.
Low oil pressure means the oil may not be circulating through the engine at the required pressure.
Both deserve attention, but low oil pressure can be particularly urgent because an engine operating without adequate lubrication can suffer serious damage.
Your owner's manual can help you identify which oil-related symbol your vehicle uses.
14. Maintenance Reminder Light
Not every dashboard light means something has failed.
Many vehicles display a maintenance required, service due, or oil life reminder when scheduled maintenance is approaching.
These reminders may be based on mileage, time, engine operation, or an oil-life monitoring system.
They are designed to help drivers stay on top of routine maintenance such as oil changes.
A maintenance reminder is different from the check engine light.
The check engine light indicates the vehicle's computer has detected a problem. A maintenance reminder generally means routine service is due based on the manufacturer's schedule.
What Should You Do When a Warning Light Appears?
The first thing to do is stay calm and pay attention to what the vehicle is telling you.
Ask yourself:
What color is the light?
Is it solid or flashing?
Did anything else change at the same time?
Listen for unusual noises and pay attention to how the vehicle feels.
Is it shaking? Is steering more difficult? Does the brake pedal feel different? Is the engine losing power? Is the temperature increasing?
If the vehicle is behaving abnormally or a serious red warning appears, find a safe location to stop.
If the vehicle appears to be operating normally and the warning is not urgent, consult your owner's manual and arrange for the issue to be diagnosed as appropriate.
Never ignore a warning simply because the vehicle still seems to drive normally.
Indiana Weather Can Trigger Some Dashboard Warnings
Fort Wayne's changing seasons can have a noticeable effect on vehicles.
Cold temperatures can lower tire pressure and trigger the TPMS light. Freezing weather puts additional stress on batteries. Snow and ice can activate traction-control systems. Summer heat can place additional demands on cooling systems.
That is why routine vehicle maintenance becomes particularly important in a climate where temperatures can change dramatically throughout the year.
Paying attention to warning lights can help you identify potential issues before they become bigger problems.
Get to Know Your Vehicle
You don't have to memorize every symbol on your dashboard.
Instead, learn the most important warnings and keep your owner's manual available for everything else.
Modern vehicles are designed to communicate with the driver. Those lights are one of the ways they do it.
Knowing the difference between a simple reminder and a potentially serious warning can help you make a more informed decision about what to do next.
Find Your Next Vehicle at The Auto Brokers on Lima Road
Whether you're driving across Fort Wayne every day or traveling throughout Northeast Indiana, understanding your vehicle is an important part of staying confident behind the wheel.
At The Auto Brokers on Lima Road in Fort Wayne, Indiana, you'll find a changing selection of pre-owned cars, trucks, SUVs, and crossovers from a variety of manufacturers.
Different vehicles may use slightly different dashboard symbols and warning systems, but the purpose is the same: helping drivers understand when their vehicle needs attention.
So, the next time an unfamiliar light suddenly appears on your dashboard, don't panic and don't simply cover it with a piece of tape.
Find out what your vehicle is trying to tell you.
