Warning Lights

Ever had a warning light show up on your dash and wonder or panic about what it means? Here you will find all the information about what each red, amber and green warning light means and whether action is required if they illuminate.

Warning lights and what they mean

Red warning lights mean you should stop the car as soon as it's safe.

Yellow warning lights mean that action is required.

Green warning lights are for information only.



Red Warning Lights

Brake System -If the light is on all the time, it could mean you simply forgot to release the handbrake​. If it remains​ after the handbrake has been released it could mean you need to add brake fluid. If the light is still illuminated after topping up the fluid there could be something wrong with your braking system and you will need to get it checked out.

Brake System light

Engine Coolant System -  This light means that your coolant levels are running low.​ You will need to check the gauge on the side of the coolant tank and top up if necessary.

Engine coolant system

Oil warning light- This light illuminates when the oil temperature is too high or the level / pressure is low.​Oil temperature is too high or the level / pressure is low.​ Stop driving, turn off the engine, and once cooled, check the oil level​. If necessary get the oil changed and if light continues to stay on, book your car into a garage to get it checked out

engine oil light

Power steering​ - 

When this light shows, It means there is a problem with your power steering, the wheel can go heavy and may make maneuvering more difficult.​ Make sure to get this problem checked out

Power steering system

Airbag and Seatbelt systemAn illuminated air bag warning light can mean a number of things. The main thing to note is that it means your airbag won’t deploy. You should take your vehicle into a mechanic so they can diagnose the problem.

Airbag and seat belt system

 Vehicle Charging System ​-​This light will illuminate when the vehicle control system detects a problem with either the battery or the alternator​​ and will need to get checked out right away.

Vehicle charging system

Steering Lock -

​Only comes on when the ignition is in the off position and the lock is engaged. ​If you see it come on at any other time, you should have the car checked out.

Steering Lock

Ignition Lock -

It could indicate an issue with the ignition switch or show that there is a problem with the key being used.If this light comes on while you are driving, chances are the key can longer be verified so you will need to take the car to get checked out. 

Ignition Lock

Seat Belt Buckles ​-

This light will appear when a passenger in the vehicle has not fastened their seatbelt.​Make sure all seat belts are fastened and the light should turn off. 

Seat Belt Buckles

Doors​ - ​This light indicates that one or more doors of the car are not shut properly.​Check all of your doors, including the boot, are properly shut.

Door warning light

Bonnet ​This light turns on when the bonnet is not closed properly.​ Make sure the bonnet has been closed properly before setting off.

Bonnet warning light

Boot - This light turns on when the boot is not closed properly. Make sure the boot has been closed properly before setting off.

Boot Warning light


Amber Warning Lights

Diesel Particulate Filter  - If the engine isn’t able to burn soot due to a short trip, this light will indicate to warn the driver of the build up. 

To fix this, take the car onto the motorway or dual carriageway and drive it for around 10 minutes at 40+ MPH. This should sufficiently raise the temperature to levels high enough to regenerate the filter and should turn the light off. 

Diesel Particulate Filter Warning Light

 Electronic Power Control​ -

The Electronic Power Control system is controlled by the engine, brake, transmission and steering control units. Because of this the light could be indicating one of many problems. If this light appears get your car checked out for any problems.

 Electronic Power Control

Glow Plug Indicator​ -

This is a common light for diesel powered vehicles. 

This light means that the engine’s glow plugs are warming up and the engine should not be started until the light goes out. If it flashes, an issue has been detected, such as a worn out glow plug and should be checked out.

Glow Plug Indicator

Engine Oil level ​- This light indicates that the engine oil level is below the acceptable limit. ​Check your oil level and refill if necessary​.

Engine Oil level warning

ABS - If the ABS light turns on whilst driving, it means that your ABS isn't working properly. ​If the light is still on after restarting the car, we suggest getting a technician to take a look at it just to be on the safe side and to reset the computer if necessary. 

ABS Warning light

Electronic Stability Control (ESC)​ -​ Usually this light will illuminate when the computer is trying to maintain traction control. This light will only stay lit whilst the vehicle is not under control and a malfunction has been detected so will need to get checked out.

Electronic Stability Control (ESC)

Tyre Pressure Monitoring System -This light will display on the dashboard when tyre pressure is too low and could create unsafe driving conditions. Check your tyre pressures with a gauge and add air until the pressures reach the vehicle manufacturer specification.

Tyre Pressure Monitoring System

Brake pad monitoring​ - The brake pad wear indicator warning light comes on when the brake pads are detected to be too thin. If the light comes on, you should bring the vehicle to a technician to have the brake pads replaced


Brake pad monitoring

Air bag or SRS light​ -​ 

This light could mean a number of things. The most important thing to know is your airbag won’t deploy. We recommend taking your car to a technician immediately to have the problem diagnosed.
Air bag or SRS light

Automatic Transmission/Automatic Gearbox ​-This light means there's an issue with the transmission, possibly the fluid temperature, fluid level, or pressure. If this light comes on, it should be checked out as soon as possible to avoid further damage. 

Automatic Transmission/Automatic Gearbox

Air Suspension ​ - This light will turn on when it detects any unusual activity. When this light comes on, the computer will save a code to identify any issues that it has detected. 

Air Suspension

Adaptive suspension dampers -​ Certain cars have sophisticated dampers in their suspension system, which can be set to be softer or firmer. If you see this warning sign, then the dampers will need checking.


Adaptive suspension dampers

Rear spoilerThe rear spoiler warning light indicates that a fault has been detected with the spoiler system. The system will be temporarily deactivated to prevent any damage from occurring. 

Rear spoiler

Bulb monitoring -This light indicates that a light bulb is out somewhere on your vehicle. Make sure you check your bulbs and get them changed. 

Bulb monitoring

Brake Lights -If this light appears it means that the brake lights aren't working. You should have it checked out immediately and get it fixed.

Brake lights

Rain and light sensor​ -Automatic lights and windscreen wipers are becoming increasingly common on new cars. If this warning light appears, it’s telling you there’s a problem with one of them.


Rain and light sensor

Headlight range control​ -This means there is an issue detected with the headlight range control system. The range control will be disabled temporarily until the problem has been solved. 

Headlight range control

Adaptive Lighting Indicator ​- This could mean a malfunctioning sensor or any issues with the motors functioning. Depending on the type of adaptive lighting in your car, this warning light could mean a few things. Refer to your owner’s manual for specific information on your vehicle’s lighting systems.


Adaptive Lighting Indicator

Tow Hitch​ -The trailer tow hitch light is designed to warn you when there is an issue with your car's tow hitch, possibly that it is unlocked. Make sure to check that everything it attached properly.

Tow Hitch

Convertible Roof​ -​This light turns on when the roof is opening or closing, and will flash if repair is needed, such as cleaning or replacement.

Convertible Roof

Key Not in Vehicle  -The key not in vehicle warning light tells you when your key isn't detected in your car, so you don't drive off without it. It can be red or orange. If the battery dies in the key fob, it won’t be able to communicate with the car and the car won't start. 

Key Not in Vehicle

Lane assist - This indicator light comes on when the lane assist system is switched on and road markings cannot be detected.

Lane assist
Press Clutch - This light is just a reminder that the clutch needs to be pressed in before the engine can be started.

Press Clutch

Washer FluidIf this light appears it means that the windscreen washer fluid is low and you should top it up.


Washer Fluid

Rear fog lights- This is just an indicator to show that these lights are on.

Rear fog lights

Low Fuel Level- A warning light we are all familiar with. This light is to indicate that the fuel level is getting low and is to prompt a fuel top up.

Low Fuel Level


Green Warning Lights​

Cruise Control This light means that the cruise control system is activated.

Cruise Control

Press Brake Pedal - This light will only applies to vehicles that are fitted with an automatic transmission. The brake pedal will need to be pressed and held while the gear lever is moved out of the park position.

Press Brake Pedal

Lane assist - This light indicated when the lane assist system is switched on and road markings can be detected.

Lane assist

Adaptive Cruise Control - This light is to indicate to show that the ACC, cruise control, and speed limiter are active. If the warning lights start flashing, you have exceeded your maximum speed set on the limiter and should therefore reduce your speed.

Adaptive Cruise Control

Find out more about the most common warning lights here

Have any problems with your warning lights that you need help with? Our service teams at our dealerships will be happy to help with any questions you may have.

Get in touch or book a service today