Warning Lights On My Car Meaning
What do the Warning Lights on my Car Mean?
Driving a car involves more than just getting from point A to point B. You are responsible for the care and maintenance of your vehicle. The first step in maintaining your car is keeping an eye on your dashboard for any warning lights.At Nissan of Elgin in Elgin, IL, our expert service team is happy to help!
These dashboard lights and their meanings are the car's way of telling you something is wrong. There are many different symbols with different meanings. What do they all mean?
Quick Reference: Dashboard Warning Light Guide
Use this chart for a quick diagnosis of your vehicle's health. If you see a Red light while driving in Elgin, safely pull over immediately.
| Warning Light | Color | Severity | Recommended Action |
|---|---|---|---|
| Brake System | Red | Critical | Stop safely; check brake fluid. Do not drive if pedal feels soft. |
| Engine Coolant | Red | Critical | Engine is overheating. Pull over and turn off engine immediately. |
| Oil Pressure | Red | Critical | Low oil pressure. Stop engine to prevent total engine failure. |
| Battery/Charging | Red | High | System failure. Drive directly to Nissan of Elgin. |
| Check Engine | Yellow | Moderate | Emissions or engine fault. Schedule a diagnostic soon. |
| TPMS (Tire Pressure) | Yellow | Moderate | Check tire PSI. Flashing light indicates a sensor fault. |
| ABS (Anti-lock Brakes) | Yellow | Moderate | Braking assist fault. Drive with caution; service is required. |
| Traction Control | Yellow | Informational | System is active on slippery roads. Solid light means a fault. |
The Three-Color System: Red, Yellow/Amber, Green
You may have never given it much thought, but most vehicles implement a three-color system to indicate the severity of the warning:
- Red lights indicate serious problems that need to be dealt with immediately. Stop driving and address the issue right away to avoid damage or safety risks.
- Yellow/amber lights mean something needs attention soon, but it may not be an emergency yet. For most of these warnings, go ahead and schedule a service appointment.
- Green lights are usually just informative. They show a system is active or functioning properly.
This color-coded system helps prioritize the dashboard warning lights for you.
Red Indicator Lights
Red indicator lights on your car's dashboard are serious warnings. It is usually best to stop driving as soon as you see one of these.
Brake System Warning Light
Symbol: Circle with an exclamation mark inside parentheses. Meaning: Indicates a problem with the brake system, such as low brake fluid or worn brake pads.
Engine Coolant Temperature Warning Light
Symbol:Thermometer in water.
Meaning: Signals that the engine is overheating.
Oil Pressure Warning Light
Symbol: Oil can with a drip.
Meaning: Indicates low oil pressure
Airbag Warning Light
Symbol: Seated passenger with an airbag inflated in front of them.
Meaning: There is a problem with the airbag system.
Battery Charge Warning Light
Symbol: Battery icon.
Meaning: Indicates a problem with the battery or charging system, such as a bad alternator or loose cable.
Power Steering Warning Light
Symbol: Steering wheel with an exclamation point.
Meaning: There is a problem with the steering system, such as low power steering fluid.
Seat Belt Reminder Light
Symbol: Person sitting with a seat belt across them.
Meaning: Reminds passengers to fasten their seat belts before driving
Steering Lock Indicator
Symbol: Steering wheel icon (varies by car model).
Meaning: Indicates that the steering lock is engaged. (The steering wheel lock should only be on when the ignition is off.)
Ignition Lock Indicator
Symbol: Key inside an outline of a car (varies by model).
Meaning:Ignition or key verification issues may prevent you from starting the car.
Door Ajar Indicator
Symbol: Car with open doors depicted.
Meaning: One or more doors are not shut properly.
Hood Open Indicator
Symbol: The car's front view with an open hood.
Meaning: The hood is not securely closed.
Trunk Open Indicator
Symbol:Car rear view with open trunk.
Meaning: The trunk is not closed.
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Yellow/Amber Indicator Lights
Yellow lights mean something needs attention, but it may not be an immediate emergency.
Check Engine Light
Symbol: Silhouetted engine or the words "CHECK ENGINE" by themselves.
Meaning: Indicates issues with the engine or emissions system.
Tire Pressure Monitoring System (TPMS) Light
Symbol: Tire with an exclamation mark (sometimes it is a flashing exclamation point).
Meaning: Indicates underinflated or overinflated tires.
Anti-lock Braking System (ABS) Light
Symbol: Circle with "ABS" inside.
Meaning: Signals a fault in the ABS system.
Traction Control Light
Symbol: Car with swerving lines light.
Meaning: Indicates activation of the traction control system in slippery conditions.
Lane Departure Warning Light
Symbol: Car veering out of lane icon.
Meaning: Alerts drivers deviating from their designated lanes.
Green Indicator Lights
Green lights are informational. They indicate a system is on.
Turn Signal Indicator
Symbol: Arrow pointing left or right.
Meaning: Indicates that the turn signals are activated.
Headlight Indicator
Symbol: Headlight with rays extending outward.
Meaning: Indicates that the headlights are on.
Fog Light Indicator
Symbol: Headlight with diagonal lines and a squiggly line through it.
Meaning: Indicates that the front fog lights are on.
Cruise Control Indicator
Symbol: Speedometer with an arrow or "CRUISE."
Meaning: Indicates that cruise control is engaged.
Lane Assist Indicator
Symbol: Car with lane markings on each side.
Meaning: Indicates that the lane assist system is active and detecting road markings.
Eco Mode Indicator
Symbol: Leaf or "ECO" text.
Meaning: Indicates that the vehicle is in Eco mode for better fuel efficiency.
Automatic Windshield Wiper System
Symbol: Windshield icon with wiper blade across it.
Meaning: Indicates that the automatic windshield wiper system is activated, detecting rain, and adjusting speed accordingly.
Common Nissan-Specific Warning Lights
If you drive a Nissan Rogue, Altima, or Sentra, you may see specific symbols unique to Nissan's advanced technology. Here is what the most common Nissan-specific lights mean for Elgin drivers.
Nissan Master Warning Light
Symbol: A triangle with an exclamation point.
Common On: Nissan Rogue & Altima
Meaning: This is a "Master Warning" often accompanied by a message on your vehicle's information display. It could indicate anything from a low windshield washer fluid level to a more serious system fault. Check your center console display for the specific text alert.
Intelligent Key System Warning
Symbol: A key icon (sometimes yellow or red).
Common On: Sentra & Altima
Meaning: If the light stays on while the engine is running, there may be a fault in the Intelligent Key system. If it's flashing yellow, your key fob battery is likely low—visit our Elgin parts department for a quick replacement.
Chassis Control / AWD Error
Symbol: "Chassis Control" text or AWD icon.
Common On: Nissan Rogue AWD
Meaning: This indicates an issue with the Active Trace Control or Engine Brake system. On snowy Chicagoland roads, a faulty AWD system is a safety risk. Have this inspected immediately by a Nissan-certified technician.
Is your Nissan dashboard showing an unusual symbol?
Ask a Nissan Technician in ElginProviding expert Nissan service for South Elgin, St. Charles, and Hoffman Estates.
Stay Informed and Drive Safely
While you may not have all these warning lights memorized, it is important to remember the three-color system. From there, remember each light has a specific meaning. Return to this list or reference your car's manual to pinpoint the issue.
If you have any questions about your dashboard lights and meanings, or if they indicate you need a service, our expert technicians are here to help. Contact us today.
FAQ
What Should I Do If My Check Engine Light Appears?
If your check engine light comes on, have a technician take a look at your car.
What Do You Do When Your Power Steering Light Comes On?
This light means there is a problem with the power steering system. Check the power steering fluid level and top it off. If the light remains on, schedule a service appointment.
Why Is My Car's Brake Light on My Dashboard?
A brake warning light can signal several issues, including low brake fluid levels, worn brake pads, or a problem with the braking system itself. If this light comes on while driving, safely pull over and check your brake fluid level. If the light persists, have your brakes inspected immediately.
What is the difference between a red and yellow dashboard light?
Red lights indicate a serious problem—stop driving immediately to avoid engine damage. Yellow/Amber lights mean a system needs attention soon. If you see a yellow light in Elgin, schedule service to prevent a costly emergency.
Is it safe to drive with the Oil Pressure Warning Light on?
No. A Red Oil Pressure Light means your engine has lost lubrication. Continuing to drive on Route 20 or I-90 can cause total engine failure. Pull over safely and contact our Elgin service center immediately.
Why is my Tire Pressure (TPMS) light flashing?
A solid light indicates low air pressure, but a flashing TPMS light usually signals a sensor malfunction. Given Chicagoland’s temperature swings, visit us for a quick recalibration to ensure your tires are safe.
What does the car icon with swerving lines mean?
This is the Traction Control Light. If it flashes, the system is actively helping you grip slippery Elgin roads. If it remains solid, the system is faulty or disabled and needs a professional inspection.
What should I do if the Power Steering Light appears?
This indicates a steering assist failure, making the vehicle much harder to turn. Check your fluid levels immediately or visit our service department near South Elgin to prevent a safety risk.
Why is there a green leaf or "ECO" symbol on my dashboard?
This is an informational light, not a warning. It confirms your vehicle is in Eco Mode to maximize fuel efficiency during your Chicagoland commute.