W Market St · (423) 913-3111 Hopper Rd · (423) 328-7036
Mon–Fri, 7:30 AM – 5:30 PM · Closed Weekends

A red dashboard light means stop and check it. An orange or yellow light means get it checked soon. Green, blue, and white lights just tell you something is turned on. Find your light below to see what it means and what to do next. If your light is not here, or you are not sure, call us and we will help you figure it out.

What the Colors Mean

Each maker draws its symbols a little differently, but the colors follow the same rules almost everywhere.

  • Red: A serious problem, or something is on that should not be, like the parking brake. Pull over safely when you can.
  • Orange or yellow: Something needs a check. The check engine light is one example.
  • White or blue: Something is turned on, like the headlights. Blue can also mean the engine is still cold.
  • Green: A system is on and working, like your turn signal.

Stop Driving Lights

If you see one of these, pull over in a safe spot and turn the car off.

Jump to a Group

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Engine Lights

These lights come from the computer that watches your engine. Most of them mean get it scanned soon. Read more on what to do when the check engine light comes on, or why a check engine light can flash and then go off. If you need help, we handle engine repair, and preventive maintenance helps stop many of these lights before they start.

Check Engine Light dashboard symbol

Check Engine Light

Get it checked soon

The engine computer found a problem. A steady light means get it checked soon. A flashing light usually means the engine is misfiring, which can damage the catalytic converter. If it flashes, slow down and get to a shop right away.

Reduced Engine Power dashboard symbol

Reduced Engine Power

Get it checked soon

The car is holding back power to protect the engine or transmission. Not every maker uses this light. Turning the car off for about 20 seconds and restarting sometimes clears it. If it comes back, get it scanned.

Maintenance or Service Needed dashboard symbol Maintenance or Service Needed dashboard symbol

Maintenance or Service Needed

Just a notice

Usually a reminder that routine service is due, like an oil change. It does not mean something is broken. Some cars show a wrench. After service, the shop resets it.

Message Indicator dashboard symbol

Message Indicator

Just a notice

The car wants you to read a message on the display. You may need to scroll through the messages with a button on the steering wheel or dash.

Shift Indicator dashboard symbol

Shift Indicator

Just a notice

On a manual car, this tells you it is a good time to shift to the next gear to save fuel.

Engine and Powertrain Warning Lights

These lights point to oil, charging, fuel, tire, and transmission trouble. Several of them need action right away. Many come from skipped service, so keep up with oil changes and watch your tires, as shown in how to take care of your tires. A charging light often points to a weak battery or a worn belt. See why a car battery goes dead and the warning signs of a bad serpentine belt. We also fix transmissions, fuel systems, diesel engines, and we handle tire service.

Low Oil Pressure dashboard symbol

Low Oil Pressure

Stop driving

The red oil can means the engine is not getting enough oil pressure. Pull over safely and turn the engine off. Driving on it can ruin the engine in minutes. Check the oil level, and call us before you drive on.

Engine Temperature Warning dashboard symbol

Engine Temperature Warning

Stop driving

The engine is too hot. Pull over safely, turn the car off, and let it cool before you open the hood. Never open a hot radiator cap. Driving while overheated can cause serious engine damage.

Transmission Oil Temperature dashboard symbol

Transmission Oil Temperature

Stop driving

The fluid in the transmission is too hot. Pull over and let it cool. Heat is one of the main things that wears out a transmission.

Battery or Charging System dashboard symbol

Battery or Charging System

Get it checked soon

The charging system is not keeping up, so the car is running on battery power alone. It will die once the battery runs down. Turn off extras like the radio and heater, and head straight to a shop. A bad alternator, belt, or battery can cause this.

Electronic Throttle Control dashboard symbol

Electronic Throttle Control

Get it checked soon

A lightning bolt between brackets. There is a problem with the electronic throttle. The car may idle rough, hesitate, or lose power. Get it checked soon.

Oxygen (Lambda) Sensor dashboard symbol

Oxygen (Lambda) Sensor

Get it checked soon

The oxygen sensor in the exhaust is dirty or not working. The car can burn more fuel and run poorly. Do not put off the repair for long.

Master Warning Light dashboard symbol

Master Warning Light

Get it checked soon

It comes on with a message on the display. Read the message, because it tells you which system needs attention.

Powertrain, Shift, or Drivetrain Trouble dashboard symbol

Powertrain, Shift, or Drivetrain Trouble

Get it checked soon

The car found a problem in the automatic transmission or shifting. Harsh shifts, slipping, or stuck gears are signs to look out for. Get it checked soon.

Clogged Air Filter dashboard symbol

Clogged Air Filter

Just a notice

The air filter is dirty or clogged. This hurts power and fuel mileage. It is an easy fix, so do it soon.

Water in Fuel (Diesel) dashboard symbol

Water in Fuel (Diesel)

Get it checked soon

Water has collected in the diesel fuel filter. Have the water drained soon. If you just filled up and the engine runs rough, the fuel may be bad.

Glow Plug (Diesel) dashboard symbol

Glow Plug (Diesel)

Just a notice

On a diesel, wait for this light to go out before you start the engine. The glow plugs are warming up. If it flashes or stays on while driving, get the engine scanned.

Loose Gas Cap dashboard symbol

Loose Gas Cap

Get it checked soon

The fuel system sees a leak, and a loose or missing gas cap is the most common cause. Tighten the cap until it clicks. The light may take a few drives to go out. If it stays on, get it scanned.

Tire Pressure Monitoring (TPMS) dashboard symbol

Tire Pressure Monitoring (TPMS)

Get it checked soon

One or more tires are low, usually about 25 percent below the correct pressure. Check all four tires with a gauge and fill to the number on the sticker inside the driver door. Cold weather often turns this light on. If it flashes first and then stays on, the sensor system may have a fault.

Brake Lights

Brakes are a safety system, so treat red brake lights seriously. Some lights look alike, so check each one carefully. Not sure if you need pads? Read how to know if you need new brakes, and how often to change brake fluid. Our brake repair starts with a video inspection so you can see the problem.

Brake System Warning dashboard symbol

Brake System Warning

Stop driving

A red circle with an exclamation point, or the word BRAKE. It comes on when the parking brake is set. If the parking brake is off and the light stays on, the brake fluid may be low or there is a brake problem. Do not keep driving. Have it checked.

Brake System Alert dashboard symbol

Brake System Alert

Stop driving

This can mean low brake fluid, the parking brake is on, or a problem in the brake system. Check that the parking brake is fully released. If the light stays on, have the car looked at before you drive.

Brake Pad Wear Warning dashboard symbol Brake Pad Wear Warning dashboard symbol

Brake Pad Wear Warning

Get it checked soon

Many cars have a sensor in the brake pads, and this light comes on when the pads are worn down. Newer cars and European cars often have it, and so do many older ones. It is not the same as the ABS light or the red brake light. Get your pads checked soon. If you hear grinding, do not wait.

Anti-lock Brake (ABS) dashboard symbol

Anti-lock Brake (ABS)

Get it checked soon

The letters ABS. Your normal brakes still work, but the anti-lock part may not. That means a longer skid on wet or icy roads. Get it diagnosed soon.

Parking Brake On dashboard symbol

Parking Brake On

Just a notice

The parking brake is set. Release it fully before you drive. Driving with it on can wear out the brakes.

Electric Parking Brake Fault dashboard symbol

Electric Parking Brake Fault

Get it checked soon

The electric parking brake has a problem. It may not set or release the way it should. Get it checked soon.

Brake Hold dashboard symbol

Brake Hold

Just a notice

The brake hold system is on and keeps the brakes applied when you are stopped, like at a red light.

Shift Lock dashboard symbol

Shift Lock

Just a notice

The shifter is locked in park or neutral. Press the brake pedal to move it out of park.

Regenerative Brake System (Hybrids) dashboard symbol

Regenerative Brake System (Hybrids)

Get it checked soon

Found on hybrids and some electric cars. If it lights up, the system that recharges the battery while you slow down has a fault. Your regular brakes should still work, but get it checked soon.

Steering, Traction, and Stability Lights

These lights help you keep control. A flashing light is usually the system working. A steady light can mean it is off or has a fault. If the steering or the ride feels off, see our steering and suspension service. Towing a trailer? Read about the trailer light on the dashboard.

Power Steering Warning dashboard symbol

Power Steering Warning

Get it checked soon

There is a problem with the power steering. If it quits, the wheel gets very hard to turn. Get it checked soon.

Electronic Brake Force Distribution dashboard symbol

Electronic Brake Force Distribution

Get it checked soon

The system that balances brake force between the wheels needs attention. Have the brakes checked.

Traction Control Active dashboard symbol

Traction Control Active

Just a notice

The system is working because a tire is slipping. Ease off the gas and drive smoothly.

Stability Control Active dashboard symbol Stability Control Active dashboard symbol

Stability Control Active

Just a notice

A flashing light means the car sensed a slippery road and is helping you keep control. Slow down.

Stability or Traction Control Off dashboard symbol

Stability or Traction Control Off

Just a notice

The system is turned off. Turn it back on unless you have a reason to leave it off.

Stability Control Fault dashboard symbol Stability Control Fault dashboard symbol

Stability Control Fault

Get it checked soon

A yellow or amber light that stays on means the stability system has a fault. The car can be driven, but it will not help you in a skid. Get it checked soon.

Towing Mode dashboard symbol

Towing Mode

Just a notice

If your vehicle has a tow mode, this light shows it is turned on.

Fluid and Temperature Lights

Low fluids cause expensive damage fast. Check these lights first. If your engine is running hot, read what to do when your car is overheating. Coolant leaks and hot engines are handled by our cooling system repair.

Low Oil Level dashboard symbol

Low Oil Level

Stop driving

The engine is low on oil. Do not drive it until you add oil. Running low can damage the engine.

Oil Level at Minimum dashboard symbol

Oil Level at Minimum

Get it checked soon

If you see the word MIN, the oil level has dropped to its lowest safe point. Add oil as soon as you can, and ask why it is going down.

Low Coolant dashboard symbol Low Coolant dashboard symbol Low Coolant dashboard symbol

Low Coolant

Get it checked soon

The cooling system is low on coolant. Low coolant leads to overheating. Have the system checked for a leak.

Coolant Temperature dashboard symbol

Coolant Temperature

Just a notice

A blue light means the engine is still cold, so go easy until it warms up. A red or flashing light means it is too hot. Pull over safely.

Transmission Temperature High dashboard symbol Transmission Temperature High dashboard symbol

Transmission Temperature High

Stop driving

The transmission is overheating, which can damage it. Pull over and let it cool.

Low Fuel dashboard symbol

Low Fuel

Just a notice

You are low on gas. Fill up soon. Running a tank very low can hurt the fuel pump.

Washer Fluid Low dashboard symbol

Washer Fluid Low

Just a notice

The washer fluid is low. Refill it when you get a chance.

Windshield Washer dashboard symbol

Windshield Washer

Just a notice

The washer is spraying right now.

Hybrid and Electric Vehicle Lights

These lights show up on hybrid, plug-in hybrid, and electric vehicles. Not sure how your car works? Read how hybrid vehicles work.

Hybrid Battery or Charging Issue dashboard symbol

Hybrid Battery or Charging Issue

Get it checked soon

If the word MAIN shows under the battery, it is a hybrid battery trouble light. The hybrid battery should be checked by a shop that works on hybrids.

Power Limitation dashboard symbol

Power Limitation

Get it checked soon

The vehicle is giving you less power than normal to protect itself. Drive gently and get it checked.

High Voltage Battery Charge Low dashboard symbol

High Voltage Battery Charge Low

Just a notice

Found on plug-in hybrids. The charge is low. Plug it in soon, or the car will switch to gas power.

Low Battery Charge (Electric) dashboard symbol

Low Battery Charge (Electric)

Get it checked soon

The battery is very low and the car may stop soon. Charge it now.

Electric Vehicle Mode dashboard symbol

Electric Vehicle Mode

Just a notice

The car is running on electric power only.

Charging Indicator dashboard symbol Charging Indicator dashboard symbol

Charging Indicator

Just a notice

The light is on or blinking while the car charges. It turns off when the battery is full.

Eco or Economy Mode dashboard symbol

Eco or Economy Mode

Just a notice

The car is driving in a fuel saving way. Many cars show this when you drive smoothly.

Lighting Indicators

Most of these lights just tell you something is turned on. A few tell you a bulb is out. If your headlights look dim or foggy, here is how to clean cloudy headlights.

Headlight Bulb Problem dashboard symbol Headlight Bulb Problem dashboard symbol

Headlight Bulb Problem

Get it checked soon

One or more headlight bulbs are burned out or not working. Replace them soon so you can see and be seen. Cloudy headlights can also cut down your view.

Turn Signal dashboard symbol

Turn Signal

Just a notice

The arrows flash when your turn signal is on. If they flash much faster than normal, a bulb is probably burned out.

Hazard Lights dashboard symbol

Hazard Lights

Just a notice

Your hazard lights are on and flashing.

Headlights On dashboard symbol

Headlights On

Just a notice

The headlights are turned on.

Low Beams On dashboard symbol

Low Beams On

Just a notice

Your low beam headlights are on.

High Beams On dashboard symbol

High Beams On

Just a notice

Your high beams are on. Turn them off for oncoming cars.

High Beam Assist dashboard symbol

High Beam Assist

Just a notice

The green light means the system that switches your high beams on and off is working.

Daytime Running Lights dashboard symbol

Daytime Running Lights

Just a notice

Your daytime running lights are on.

Fog Lights dashboard symbol Fog Lights dashboard symbol

Fog Lights

Just a notice

The fog lights are on.

Tail Lights dashboard symbol Tail Lights dashboard symbol

Tail Lights

Just a notice

The tail lights and other lights are on.

Windshield Wipers dashboard symbol

Windshield Wipers

Just a notice

The wipers are on.

Rear Window Defroster dashboard symbol

Rear Window Defroster

Just a notice

The rear window defroster is on.

4x4 and Drivetrain Lights

These lights tell you which four wheel drive mode you are in. If one flashes or stays on when it should not, have it checked. Our differential and drivetrain repair covers 4x4 systems, transfer cases, and differentials.

4x4 Auto dashboard symbol

4x4 Auto

Just a notice

The system is in automatic mode and sends power where it is needed.

4x4 High dashboard symbol

4x4 High

Just a notice

Four wheel drive is on in high range. It is meant for snow, ice, and slippery roads at normal speeds.

4x4 Low dashboard symbol

4x4 Low

Just a notice

Four wheel drive is in low range. It is for slow speeds and hard going, like steep climbs, sand, or deep mud.

Rear Differential Lock dashboard symbol

Rear Differential Lock

Just a notice

The two rear wheels are locked to turn together. Use it only when you need extra traction.

Center Differential Lock dashboard symbol

Center Differential Lock

Just a notice

Some all wheel drive vehicles let you lock the center differential. Use it if you are stuck in mud or snow.

Electronic Rear Differential Lock dashboard symbol

Electronic Rear Differential Lock

Just a notice

An X in place of the closed circle shows the electronic rear differential lock is on.

Safety and Security Lights

Airbag and key lights matter. The open door, hood, and trunk lights are simple reminders. Airbag, sensor, and key problems are often electrical, and our electrical repair can track them down. If you have a keyless car, see how to protect it from theft.

Airbag Warning dashboard symbol Airbag Warning dashboard symbol

Airbag Warning

Get it checked soon

There is a problem with the airbag system. If this light stays on, your airbags may not work in a crash. Get it checked right away.

Side Airbag Off dashboard symbol

Side Airbag Off

Just a notice

The side airbag is turned off. This is common when a passenger seat sensor turns it off.

Seat Belt Reminder dashboard symbol

Seat Belt Reminder

Just a notice

Someone is not buckled up. Buckle up. It is the law in Tennessee.

Security System Problem dashboard symbol

Security System Problem

Get it checked soon

If this stays on while the car is running, the security system has a fault. If the car will not start with the right key, call us.

Immobilizer Light dashboard symbol Immobilizer Light dashboard symbol

Immobilizer Light

Just a notice

The light flashes or comes on briefly to show the anti-theft system is working. If the car will not start and the light stays on, the key may not be read.

Key Recognized dashboard symbol

Key Recognized

Just a notice

The green key light means the car found your key and can be started.

Key Not Detected dashboard symbol

Key Not Detected

Get it checked soon

A flashing red key light means the car cannot find the key. If the key is inside the car, the key battery is likely dead.

Lane Departure dashboard symbol

Lane Departure

Just a notice

The car is watching the lane lines. The light flashes amber if you drift close to a lane line without a turn signal.

Following Distance Warning dashboard symbol

Following Distance Warning

Just a notice

You are too close to the car ahead, or closing in fast. Slow down and back off.

Parking Assist On dashboard symbol

Parking Assist On

Just a notice

The green light means parking assist is turned on.

Parking Assist Problem dashboard symbol

Parking Assist Problem

Get it checked soon

A yellow or flashing light means the system is not working. Sometimes the sensors only need a good cleaning. If it stays on, get it checked.

Door Open dashboard symbol

Door Open

Just a notice

A door is open or not fully latched. Shut it before you drive.

Hood Open dashboard symbol

Hood Open

Just a notice

The hood is open or not fully latched. Stop and close it before you drive.

Trunk Open dashboard symbol

Trunk Open

Just a notice

The trunk or tailgate is open or not fully latched.

A Light Is On. What Do We Do Next?

Our technicians scan the vehicle to read the codes behind the light. We then do a digital video inspection so you can see what we found, and we give you a written estimate before any work starts. Any qualified repair is backed by our 36 month, 36,000 mile nationwide warranty. Not sure which of our shops is closest? See our West Market Street shop or our Hopper Road shop.

Got a light on? Let us take a look

Book a visit online, or call the shop closest to you.

W Market St · (423) 913-3111 Hopper Rd · (423) 328-7036

Dashboard Warning Light Questions

Can I keep driving with a warning light on?

It depends on the light. A red light usually means pull over safely. An orange light usually means the car is safe to drive for a short time, but you should get it checked soon. A flashing check engine light is the exception. Slow down and get to a shop right away.

Why did my light come on and then go off?

Some lights come on when the car sees a problem and go out if the problem does not come back. The car still saves a code, so a scan can tell us what happened.

Can I just reset the light myself?

You can clear many lights, but that does not fix the cause, and the light will usually return. Clearing a code also erases helpful information. It is better to have the code read first.

My brake pad light is on but my brakes feel fine. What now?

That is normal. The sensor warns you before the pads are gone. Have the pads checked soon, before they wear down to metal and start damaging the rotors.

Why is my tire pressure light on when it gets cold?

Cold air shrinks, so tire pressure drops when the temperature falls. A tire can lose about one pound for every 10 degree drop. Fill the tires to the number on the sticker inside the driver door.

My light is not on this page. What should I do?

Check your owner manual first, since every maker draws a few symbols differently. You can also call either shop and tell us what the light looks like. We will tell you what it means.