Citroen C4: Warning and indicator lamps

Displayed as symbols, the warning and indicator lamps inform the driver of the occurrence of a malfunction (warning lamps) or of the operating status of a system (operation or deactivation indicator lamps). Certain lamps light up in two ways (fixed or flashing) and/or in several colours.

Associated warnings

The illumination of a lamp may be accompanied by an audible signal and/or a message displayed in a screen.

Relating the type of alert to the operating status of the vehicle allows you to determine whether the situation is normal or whether a fault has occurred: refer to the description of each lamp for further information.

When the ignition is switched on

Certain red or orange warning lamps come on for a few seconds when the ignition is switched on. These warning lamps should go off as soon as the engine is started.

For more information on a system or a function, refer to the corresponding section.

Persistent warning lamp

If a red or orange warning lamp comes on, there may be fault which needs further investigation.

If a lamp remains lit

The references (1), (2) and (3) in the warning and indicator lamp description indicate whether you should contact a qualified professional in addition to the immediate recommended actions.

(1): You must stop the vehicle.

Stop as soon as it is safe to do so and switch off the ignition.

(2): Contact a CITROËN dealer or a qualified workshop.

(3): Go to a CITROËN dealer or a qualified workshop.

• Red warning/indicator lamps
• Orange warning/indicator lamps
• Green warning/indicator lamps
• Blue warning/indicator lamps

Red warning/indicator lamps

STOP

Fixed, associated with another warning lamp, accompanied by the display of a message and an audible signal.

A serious fault with the engine, braking system, power steering or automatic gearbox or a major electrical fault has been detected.

Carry out (1) and then (2).

Engine self-diagnostics system (Petrol or Diesel)

Fixed.

A major engine fault has been detected.

Carry out (1) and then (2).

Maximum coolant temperature

Fixed.

The temperature of the cooling system is too high.

Carry out (1), then wait until the engine has cooled down before topping up the level, if necessary. If the problem persists, carry out (2).

Engine oil pressure (Petrol, Hybrid or Diesel)

Fixed.

There is a fault with the engine lubrication system.

Carry out (1) and then (2).

System malfunction (Hybrid or Electric)

Fixed.

A fault has been detected in the system (electric motor or traction battery).

Carry out (1) and then (2).

Cable connected (Electric)

Fixed when the ignition is switched on.

The charging cable is connected to the vehicle's connector.

Fixed when the ignition is switched on, accompanied by a message.

It is not possible to start the vehicle while the charging cable is connected to the vehicle's connector.

Disconnect the charging cable and close the flap.

Traction battery overheating (Hybrid or Electric)

Fixed, combined with the STOP warning lamp, accompanied by the display of a message and an audible signal.

The traction battery's temperature is too high.

Carry out (1).

Evacuate the vehicle as quickly as possible and move to a safe distance.

Carry out (2).

Traction battery malfunction (Hybrid or Electric)

Fixed, combined with the Service warning lamp, accompanied by the display of a message.

The traction battery has a fault.

Carry out (2).

12 V battery charge

Fixed.

The battery charging circuit is faulty (e.g. dirty terminals, loose or severed alternator belt).

Carry out (1).

If the electric parking brake stops working, immobilise the vehicle:

► With the manual gearbox, engage a gear.

► With the automatic gearbox or drive selector, fit the chock against one of the wheels.

Clean and tighten the terminals. If the warning lamp does not go off when the engine is started, carry out (2).

Braking

Fixed.

The brake fluid level in the braking circuit has dropped significantly.

Carry out (1), then top up with fluid that complies with the manufacturer's recommendations. If the problem persists, carry out (2).

Fixed.

The electronic brake force distribution (EBFD) system is faulty.

Carry out (1) and then (2).

Electric parking brake

Fixed.

The electric parking brake is applied.

Flashing.

Application/release is faulty.

Carry out (1): park on flat ground (on a level surface).

With a manual gearbox, engage a gear.

With an automatic gearbox or drive selector, select mode P.

Switch off the ignition and carry out (2).

Door(s) open

Fixed, associated with a message identifying the access.

An audible signal supplements the alert if the speed is higher than 6 mph (10 km/h).

A door or the boot is not properly closed.

Seat belts not fastened/unfastened

Fixed or flashing, accompanied by an increasing audible signal.

A seat belt has not been fastened or has been unfastened.

Orange warning/indicator lamps

Service

Temporarily on, accompanied by the display of a message.

One or more minor faults, for which there is/ are no specific warning lamp(s), have been detected.

Identify the cause of the fault using the message displayed on the instrument panel.

You may be able to deal with some faults yourself, such as changing the battery in the remote control.

For other faults, such as with the tyre underinflation detection system, carry out (3).

Fixed, accompanied by the display of a message.

One or more major faults, for which there is/ are no specific warning lamp(s), have been detected.

Identify the cause of the fault using the message displayed on the instrument panel, then carry out (3).

Fixed, accompanied by the display of the message "Audible Warning System fault: Repair needed ".

The audible warning system is in failure.

The following driving aids may be disturbed or unavailable:

- Road signs recognition.

- Active Safety Brake/Collision Risk Alert.

- Lane keeping assist.

- Driver Attention Warning.

Carry out (3).

Fixed, accompanied by the message "Parking brake fault".

Automatic release of the electric parking brake is unavailable.

Carry out (2).

Service warning lamp fixed and service spanner flashing then fixed.

The servicing interval has been exceeded.

The vehicle must be serviced as soon as possible.

Only with BlueHDi Diesel engines.

Braking

Fixed.

A minor fault with the braking system has been detected.

Drive carefully.

Carry out (3).

Malfunction (with electric parking brake)

Fixed, accompanied by the message "Parking brake fault".

The vehicle cannot be immobilised with the engine running.

If manual application and release commands are not working, the electric parking brake control is faulty.

The automatic functions must be used at all times and are automatically reactivated in the event of a fault with the control.

Carry out (2).

Fixed, accompanied by the message "Parking brake fault".

The electric parking brake is faulty: manual and automatic functions may not be working.

When stationary, to immobilise the vehicle:

► Pull the electric parking brake control and hold it for approximately 7 to 15 seconds, until the indicator lamp lights up on the instrument panel.

If this procedure does not work, secure the vehicle:

► Park on a level surface.

► With a manual gearbox, engage a gear.

► With an automatic gearbox or drive selector, select mode P, then place the supplied chock against one of the wheels.

Then carry out (2).

Automatic functions deactivated (electric parking brake)

Fixed.

The "automatic application" (on switching off the engine) and "automatic release" (on acceleration) functions are deactivated.

If automatic application/release is no longer possible:

► Start the engine.

► Use the control to apply the electric parking brake.

► Take your foot fully off the brake pedal.

► Hold the control pressed in the release direction for between 10 and 15 seconds.

► Release the control.

► Depress and hold the brake pedal.

► Pull the control in the application direction for 2 seconds.

► Release the control and the brake pedal.

Anti-lock braking system (ABS)

Fixed.

The anti-lock braking system has a fault.

The vehicle retains conventional braking.

Drive carefully at moderate speed, then carry out (3).

Power steering

Fixed.

The power steering has a fault.

Drive carefully at moderate speed, then carry out (3).

Engine self-diagnostic system (Petrol, Hybrid or Diesel)

Flashing.

The engine management system has a fault.

There is a risk that the catalytic converter will be destroyed.

You must carry out (2).

Fixed.

The emissions control system has a fault.

The warning lamp should go off when the engine is started.

Carry out (3) without delay.

Engine self-diagnostics system (Petrol, Hybrid or Diesel)

Fixed.

A minor engine fault has been detected.

Carry out (3).

Dynamic stability control (DSC)/Anti-slip regulation (ASR)

Flashing.

DSC/ASR system regulation is activated in the event of a loss of grip or trajectory.

Fixed.

The DSC/ASR system has a fault.

Carry out (3).

Emergency brake malfunction (with electric parking brake)

Fixed, accompanied by the message "Parking brake fault".

Emergency braking does not deliver optimal performance.

If automatic release is not available, use manual release or carry out (3).

Hill start assist

Fixed, accompanied by the message "Anti roll-back system fault".

The system has a fault.

Carry out (3).

Dynamic stability control (DSC)/Anti-slip regulation (ASR)

Fixed.

The system is deactivated.

The DSC/ASR system is reactivated automatically when the vehicle is started, and at speeds above approximately 31 mph (50 km/h).

At speeds below 31 mph (50 km/h), it can be reactivated manually.

Under-inflation

Fixed.

The pressure in one or more tyres is too low.

Check the pressure of the tyres as soon as possible.

Reinitialise the detection system after adjusting the pressure.

Under-inflation warning lamp flashing then fixed and Service warning lamp fixed.

The tyre pressure monitoring system is faulty.

Under-inflation detection is no longer monitored.

Check the tyre pressures as soon as possible and carry out (3).

Road signs recognition

Fixed, accompanied by the display of a message and an audible signal.

The system has a fault.

Carry out (3).

Fixed, accompanied by the display of the message "Driving Assistance Sensor blind: Clean sensor, see User Manual ".

The sensor is masked.

Stop as soon as it is safe to do so and switch off the ignition.

Clean the front camera.

Engine preheating (Diesel)

Temporarily on (up to approximately 30 seconds in severe weather conditions).

When switching on the ignition, if the weather conditions and the engine temperature make it necessary.

Wait until the warning lamp goes off before starting.

When the warning lamp goes off, starting will occur immediately if you press and hold:

- the clutch pedal with a manual gearbox.

- the brake pedal with an automatic gearbox.

If the engine does not start, make the engine starting request again, while keeping your foot on the pedal.

Particle filter (Diesel)

Fixed, accompanied by an audible signal and a message about the risk of particle filter blockage.

The particle filter is nearing saturation.

As soon as traffic conditions permit, regenerate the filter by driving at a speed of at least 37 mph (60 km/h) until the warning lamp goes off.

Diesel fuel filter (Diesel)

Fixed.

The Diesel fuel filter contains water.

Carry out (2) without delay. Risk of damaging the fuel injection system! Airbags

Fixed, associated with the Service warning lamp and accompanied by the display of a message.

One of the airbags or seat belt pyrotechnic pretensioners is faulty.

Carry out (3).

Front passenger airbag (ON)

Fixed.

The front passenger airbag is activated.

The control is set to the "ON" position.

In this case, do not install a "rearward facing" child seat on the front passenger seat - risk of serious injury!

Front passenger airbag (OFF)

Fixed.

The front passenger airbag is deactivated.

The control is set to the "OFF" position.

A "rearward facing" child seat can be installed, unless there is a fault with the airbags (Airbags warning lamp on).

Low fuel level (Petrol, Hybrid or Diesel)

Fixed, with the reserve level shown in red, accompanied by an audible signal and the display of a message.

When it first comes on, you have approximately 6 litres of fuel remaining in the tank (reserve).

Until the fuel level is topped up, this alert will be repeated every time the ignition is switched on, with increasing frequency as the fuel level decreases and approaches zero.

Refuel without delay to avoid running out of fuel.

Never drive until completely empty, as this could damage the emissions control and injection systems.

Low traction battery level (Electric)

Fixed, accompanied by an audible signal.

The state of charge of the traction battery is low.

View the remaining range.

Put the vehicle on charge as soon as possible.

Tortoise mode with limited driving range (Electric)

Fixed.

The state of charge of the traction battery is critical.

The engine power gradually decreases.

You must put the vehicle on charge.

If the warning lamp remains lit, carry out (2).

Pedestrian horn (Hybrid or Electric)

Fixed.

Horn fault detected.

Carry out (3).

Collision Risk Alert/Active Safety Brake

Flashing.

The system activates and brakes the vehicle momentarily to reduce the speed of collision with the vehicle in front.

For more information, refer to the Driving section.

Fixed, accompanied by the display of a message.

The system has been deactivated via the touch screen.

Fixed, accompanied by a message and an audible signal.

The system has a fault.

Carry out (3).

Fixed, accompanied by the display of the message "Driving Assistance Sensor blind: Clean sensor, see User Manual ".

The sensor is masked.

Stop as soon as it is safe to do so and switch off the ignition.

Clean the front camera.

Fixed.

The system has a fault.

If these warning lamps come on after the engine is switched off and then restarted, carry out (3).

Fixed.

The system is deactivated temporarily because the driver and/or front passenger (depending on version) has been detected as present but the corresponding seat belt has not been fastened.

Lane keeping assist

Flashing.

You are about to cross a broken lane marking without operating the direction indicators.

The system is activated, then corrects the trajectory if it detects a risk of unintentionally crossing a line or hard shoulder (depending on version).

For more information, refer to the Driving section.

Fixed.

The system has been automatically deactivated or placed on standby.

Fixed, accompanied by the display of the message "Driving Assistance Sensor blind: Clean sensor, see User Manual ".

The sensor is masked.

Stop as soon as it is safe to do so and switch off the ignition.

Clean the front camera.

Fixed.

The system has a fault.

Carry out (3).

Driver Attention Warning (Distraction detection)

Fixed.

The system is deactivated.

Fixed, accompanied by the display of a message and an audible signal.

The system has a fault.

Carry out (3).

Fixed, accompanied by the display of the message "Driving Assistance Sensor blind: Clean sensor, see User Manual ".

The sensor is masked.

Stop as soon as it is safe to do so and switch off the ignition.

Clean the front camera.

Parking sensors

Flashing.

The system detects an obstacle.

Fixed, accompanied by the display of a message and an audible signal.

The system has a fault.

Carry out (3).

Fixed, accompanied by the display of the message "Parking Assistance Sensor blind: Clean sensor, see User Manual ".

The sensor is masked.

Stop as soon as it is safe to do so and switch off the ignition.

Clean the front and/or rear sensors.

Lane positioning assist

Fixed, accompanied by the Service warning lamp.

The system has a fault.

Carry out (3).

Stop & Start (Petrol)

Fixed, accompanied by the display of a message.

The Stop & Start system has been deactivated manually.

The engine will not switch off at the next traffic stop.

Reactivate the system via the touch screen.

Fixed.

The Stop & Start system has been deactivated automatically.

The engine will not switch off at the next traffic stop, if the exterior temperature is:

- below 0ºC.

- above +35ºC.

For more information, refer to the Driving section.

Flashing then fixed, accompanied by a message.

The system has a fault.

Carry out (3).

e-Auto mode (Hybrid)

Fixed, accompanied by the display of a message.

The e-Auto mode has been deactivated manually.

The petrol engine will not switch off at the next release of the accelerator pedal or at the next traffic stop.

Reactivate the mode via the touch screen.

AdBlue (BlueHDi)

On for around 30 seconds when starting the vehicle, accompanied by a message indicating the driving range.

The driving range is between 1,500 and 500 miles (2,400 and 800 km).

Top up the AdBlue.

Fixed, on switching on the ignition, accompanied by an audible signal and a message indicating the driving range.

The driving range is between 500 and 62 miles (800 and 100 km).

Promptly top up the AdBlue, or carry out (3).

Flashing, accompanied by an audible signal and a message indicating the driving range.

The driving range is less than 62 miles (100 km).

You must top up the AdBlue to avoid engine starting being prevented, or carry out (3).

Flashing, accompanied by an audible signal and a message indicating that starting is prevented.

The AdBlue tank is empty: the legally required engine immobiliser system prevents the engine from starting.

To restart the engine, top up the AdBlue or carry out (2).

It is essential to add at least 10 litres of AdBlue to the tank.

SCR emissions control system (BlueHDi)

Fixed when the ignition is switched on, accompanied by an audible signal and a message.

A malfunction of the SCR emissions control system has been detected.

This alert disappears once the exhaust emissions return to normal levels.

Flashing AdBlue warning lamp on switching on the ignition, with the Engine self-diagnostics warning lamp on fixed, accompanied by an audible signal and a message indicating the driving range.

Depending on the message displayed, it is possible to drive for up to 685 miles (1,100 km) before the engine immobiliser is triggered.

Carry out (3) without delay, to avoid starting being prevented.

Flashing AdBlue warning lamp on switching on the ignition, with the Engine self-diagnostics warning lamp on fixed, accompanied by an audible signal and a message indicating that starting is prevented.

The engine immobiliser prevents the engine from restarting (the permitted driving limit has been exceeded after confirmation of a malfunction of the emissions control system).

To start the engine, carry out (2).

Foot on the clutch (Petrol or Diesel)

Fixed.

Stop & Start: the change to START mode is rejected because the clutch pedal is not fully depressed.

Fully depress the clutch pedal.

Foot on the brake

Fixed.

Insufficient or no pressure on the brake pedal.

Rear foglamp

Fixed.

The lamp is on.

Automatic headlamp dipping

Fixed, accompanied by an audible signal and a message.

A function or camera malfunction is detected.

Carry out (2).

Green warning/indicator lamps

Stop & Start (Petrol or Diesel)

Fixed.

When the vehicle stops, the Stop & Start system puts the engine into STOP mode.

Flashing temporarily.

STOP mode is momentarily unavailable or START mode is automatically triggered.

For more information, refer to the Driving section.

Vehicle ready to drive (Electric)

Fixed, accompanied by an audible signal when it comes on.

The vehicle is ready to drive and the thermal comfort systems are available.

The indicator lamp goes out upon reaching a speed of approximately 3 mph (5 km/h) and lights up again when the vehicle stops moving.

The lamp will go out when you switch off the motor and exit the vehicle.

Seat occupied/Seat belt fastened

Fixed.

With the ignition on, the driver or a passenger has fastened their seat belt.

Lane positioning assist

Fixed.

The function has been activated.

All conditions have been met: the system is operating.

For more information, refer to the Driving section.

Direction indicators

Flashing with audible signal.

The direction indicators are on.

Sidelamps

Fixed.

The lamps are on.

Dipped beam headlamps

Fixed.

The lamps are on.

Automatic headlamp dipping

Fixed.

The function has been activated via the touch screen.

The lighting control stalk ring is in the "AUTO" position.

For more information, refer to the Lighting and visibility section.

Front foglamps

Fixed.

The front foglamps are on.

Blue warning/indicator lamps

Main beam headlamps

Fixed.

The lamps are on.

Black/white warning lamps

Foot on the clutch (Petrol or Diesel)

Fixed.

Stop & Start: the change to START mode is rejected because the clutch pedal is not fully depressed.

Fully depress the clutch pedal.

Foot on the brake

Fixed.

Insufficient or no pressure on the brake pedal.

Fuel filter (Diesel)

Fixed.

The Diesel fuel filter contains water.

Carry out (2) without delay. Risk of damaging the fuel injection system!