Jaguar Warning Lights | Your Complete Guide

Your Jaguar is designed to monitor itself continuously – everything from engine performance, emissions, brakes and lights to the driver assistance systems that help you stay safe and in control whether on and off-road. Most of the time these operate without any need for your intervention, but when an issue does occur the warning lights and your driver information panel will let you know what’s happened and what to do about it.

Most warning and information symbols that you’ll see on the driver display will be familiar to you from previous vehicles. However, it’s worth while familiarising yourself with some of the more recent introductions such as exhaust filter or Diesel Exhaust Fluid so you can know what to do if they come on.

If you’re unsure about what course of action to take, contact your nearest Jaguar dealer. They’ll be able to advise and, if necessary, take your Jaguar in for repair.

The key Jaguar warning lights are either Red, Amber or Green

  • Red means stop as soon as it’s safe.
  • Amber means that action is required.
  • Green lights are advisory – no action is needed.

If a red alert requires you to stop please seek help, either from a roadside assistance service or else from the network of Jaguar dealerships and service specialists.

To book a Jaguar service, contact your local dealer today.

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Worried about your BMW? Checkout our complete guide to BMW Warning Lights.

Worried about your Audi? Checkout our complete guide to Audi Warning Lights.

Worried about your Mercedes-Benz? Checkout our complete guide to Mercedes-Benz Warning Lights.

Worried about your Land Rover? Checkout our complete guide to Land Rover Warning Lights.



​Red Warning Lights

Battery

The 12V battery charge warning lamp comes on briefly when the vehicle's ignition is switched on to ensure the bulb is working. It should go out when the engine has started. If the lamp remains on or comes on while driving, there is a fault with the battery charging system. You’ll find a warning message on the instrument panel.

Seat belt

The seat belt sign will come on and a chime will sound if a passenger or driver unbuckles their belt while the car is in motion. The lamp will go out again when the relevant seat belt is buckled. (Note: if you put objects like bags or shopping on the front passenger seat, they may activate the seat belt reminder feature. Either stow them in the boot or fasten the seat belt around them.)

Handbrake, brake system

The brake warning lamp illuminates briefly when the ignition is switched on. It should go out and stay off while you’re driving. If it comes on, you could have a fault in your brake system or be running low on brake fluid. Stop as soon as you safely can do so, check the fluid level and top up if necessary. If the light stays on, seek help.

Triangle Critical Warning​

The critical warning message lamp will come on to warn you when an important message displays in the instrument panel.

def filter warning light

Exhaust DEF

If the Diesel Exhaust Fluid (DEF) warning lamp illuminates, the level of DEF is seriously low. Follow the on-screen messages; your Jaguar will not run when the DEF reservoir has run dry. The lamp also illuminates if the incorrect fluid has been added to the system, or if there is a fault with the system. Stop as soon as you can and contact roadside assistance or a Jaguar dealer.

Engine Temperature

The engine temperature warning lamp comes on when the engine's temperature is too high. The instrument panel also displays a warning message. Stop as soon as you can safely do so. Report the fault or seek assistance before continuing.

diesel exhaust filter warning light

DEF Exhaust Filter

Jaguar’s latest diesel models produce exceptionally low exhaust emissions as a result of Diesel Exhaust Fluid (DEF), which is injected into the exhaust gases. If the DEF reservoir runs out completely, the car will stop rather than risk damaging the engine. The warning lamp illuminates red to warn the driver that the level of DEF is seriously low. It also comes on red if the incorrect fluid has been added to the system, or if there is a fault with the system. Follow the messages on the instrument panel, if safe to do so.

Lane Departure Warning

When the lane departure feature is active, you should always use your direction indicators before crossing a lane marking. If you don’t do so, the red lane departure warning lamp will illuminate (showing which lane boundary you’ve crossed). You will also feel a vibration through the steering wheel.

Low Oil Pressure

If the low oil pressure warning lamp flashes or illuminates while driving, stop the vehicle as soon as you can do so safely. Switch off the engine immediately. Check and top up the oil level, if necessary. Start the engine. If the lamp remains on, switch the engine off immediately. Contact roadside assistance or a Jaguar dealership before continuing.



​Amber Warning Lights

hill descent warning light

Hill Descent Control

The Hill Descent Control (HDC) lamp illuminates continuously when the HDC system is selected and the system is controlling a steep descent. If the lamp flashes, HDC has been selected, but the operating conditions are not being met or HDC fade-out is occurring.

Airbag

The airbag warning lamp illuminates, as a bulb check, when the vehicle's ignition is switched on. The lamp should go out again after 6 seconds. If the lamp illuminates again while driving, there is a fault with the airbag system.

ABS

The ABS warning lamp comes on briefly, as a bulb check, when the ignition is switched on. If the lamp remains on, or comes on while driving, there is a fault with the ABS system (though the brakes will still work). Drive with care, avoiding heavy braking.

Brake

The brake warning lamp illuminates briefly when the vehicle's ignition is switched on to check the bulb is working. If the lamp shows amber after starting the engine, or while driving, the cause could be worn brake pads or a fault with the braking system. You can still drive with care but should report the issue as soon as possible.

Check Engine

The check engine warning lamp illuminates when the vehicle's ignition is switched on and stays on until the engine starts. If the lamp illuminates when the engine is running, there’s an emissions-related fault. The vehicle is safe to drive with the lamp illuminated, but you should report the fault as soon as possible. While the lamp is on the vehicle may enter limp-home mode, which reduces vehicle performance to prevent further damage. If the lamp flashes when the engine is running, slow down as soon as it is safe to do so. 

def filter warning light

DEF

If the Diesel Exhaust Fluid (DEF) warning lamp lights up amber it means that that the level of DEF is running low. The warning lamp also shows amber if the wrong fluid has been added to the system, or if there is a fault with the system. The instrument panel will also display a warning message.

Dynamic Stability Control

The Dynamic Stability Control (DSC) lamp flashes when the system is triggered. If there is a fault with the system, it remains illuminated and the instrument panel displays a warning message. You can still drive, but the DSC assistance won’t be on, so proceed with caution.

Dynamic Stability Control off

The Dynamic Stability Control (DSC) OFF shows when the system is switched off. The lamp is accompanied by a chime and a confirmation message in the instrument panel.

diesel exhaust filter warning light

Exhaust filter

If the filter has failed to regenerate and is starting to become full, the exhaust warning light comes on amber. The instrument panel also displays a warning message. Follow the on-screen messages when it’s safe to do so.

External temperature

The external temperature lamp illuminates when the external temperature is low enough for ice to form on the road.

follow warning light land rover

Follow mode

The follow mode lamp illuminates when the adaptive cruise control system is in follow mode, i.e. maintaining a set distance from the vehicle in front.

Amber triangle general message

The general warning and information lamp illuminates to let you know that a non-critical warning message, or an information message, is displayed in the instrument panel.

Glow plugs (diesel models)

The glow plug lamp illuminates when the vehicle's ignition is switched on, to indicate that the glow plugs are active and helping the engine to start.

Low fuel warning

The low fuel warning lamp illuminates when the fuel level is low. You should refuel at the earliest opportunity. The arrow shows which side of the vehicle the fuel filler flap is located.

Rear fog lights

The amber rear fog light indicator illuminates when the rear fog lights are switched on.

Tyre Pressure Monitoring System (amber)

If the Tyre Pressure Monitoring System (TPMS) lamp comes on, it means that one or more tyres are significantly under-inflated. You’ll also see a warning message on the instrument panel. Stop the vehicle as soon as it’s safe to do so and check the tyre pressures. Inflate to the recommended pressure. If the lamp flashes to there’s a system fault.



Green Information Lights

Auto High Beam Assist

The Auto High Beam Assist (AHBA) lamp illuminates when the AHBA feature is active. This will automatically dip your lights to avoid dazzling oncoming traffic.​

cruise control warning light

Cruise Control

The lamp illuminates when cruise control or adaptive cruise control is active.​

Auto Stop/Start

The auto stop/start system is designed to save fuel in traffic. The lamp illuminates when the engine is momentarily shut down but ready to start again.

indicator warning lights

Direction indicators

The appropriate direction indicator lamp, left or right, flashes when the direction indicators are operated. If a direction indicator bulb fails, the visual and audible warnings flash and sound at twice the normal rate.​

Forward alert

The forward alert lamp illuminates when the system is active. If a vehicle or object is detected in the user defined sensitivity area, a warning tone sounds.

lane departure warning

Lane departure warning

The lane departure warning lamp illuminates to confirm the lane departure warning system is enabled. Recognised lane markings illuminate green, otherwise the lane markings are shown as grey.

diesel exhaust filter warning light

Exhaust filter

The exhaust filter lamp briefly illuminates green after a successful filter regeneration process.


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*Refer to owner’s manual or seek professional assistance.