Citroen C4: Stop & Start (Petrol or Diesel)

The Stop & Start function puts the engine temporarily into standby - STOP mode - during phases when the vehicle is stationary (e.g. red lights, traffic jams). The engine automatically restarts - START mode - as soon as the driver indicates the intention of moving off again.

Primarily designed for urban use, the function is intended to reduce fuel consumption and exhaust emissions as well as the noise level when stationary.

The function does not affect the functionalities of the vehicle, in particular the braking.

Deactivation/Reactivation

By default, the function is activated when the ignition is switched on.

 With Touch screen BLUETOOTH audio system or MyCitroën Play

The settings are changed via the Driving touch screen menu.

 With MyCitroën Drive Plus

The settings are changed via the ADAS touch screen application or via the Shortcuts for driving aids.

The display of a message on the instrument panel confirms the change of state.

If the function is deactivated while the engine is in STOP mode, it will restart immediately.

Associated indicator lamps

Function activated: engine on standby (STOP mode)

Function deactivated or malfunction

Opening the bonnet

Before doing anything under the bonnet, deactivate the Stop & Start system to avoid any risk of injury caused by the engine restarting automatically.

Driving on flooded roads

Before entering into a flooded area, it is strongly recommended that you deactivate the Stop & Start system.

For more information on Driving recommendations, particularly on flooded roads, refer to the corresponding section.

Operation

Main conditions for operation

- The driver's door must be closed.

- The driver's seat belt must be fastened.

- The level of charge in the battery must be sufficient.

- The temperature of the engine must be within its nominal operating range.

- The outside temperature must be between 0ºC and 35ºC.

Putting the engine into standby (STOP mode)

The engine automatically enters standby mode as soon as the driver indicates their intention to stop:

- With a manual gearbox: when you place the gear lever in neutral and release the clutch pedal.

- With an automatic gearbox: with the gear selector in mode D or M, when the brake pedal is depressed until the vehicle stops or when the mode N is selected, with the vehicle stationary.

Time counter

A time counter adds up the time spent in standby during the journey. It is reset to zero every time the ignition is switched on.

Special cases

The engine will not go into standby if the conditions for operation are not met and in the following cases:

- Steep slope (ascending or descending).

- Vehicle has not exceeded 6 mph (10 km/h) since the last engine start (with the key or the START/STOP button).

- Sport mode selected (depending on equipment).

- Needed to maintain a comfortable temperature in the passenger compartment.

- Demisting active.

In these cases, this indicator lamp flashes for a few seconds, then goes off.

After the engine has restarted, STOP mode is not available until the vehicle has reached a speed of 5 mph (8 km/h).

During parking manoeuvres, STOP mode is not available for a few seconds after coming out of reverse gear or turning the steering wheel.

Restarting the engine (START mode)

The engine automatically restarts as soon as the driver indicates the intention of moving off again: With a manual gearbox: when the clutch pedal is fully depressed.

With an automatic gearbox:

- With the selector in mode D or M: when the brake pedal is released.

- With the selector in mode N and the brake pedal released: when the mode D or M is selected.

- With the selector in mode P and the brake pedal depressed: when the mode R, N, D or M is selected.

- When the reverse gear is engaged.

Special cases

The engine will restart automatically if the conditions for operation are met again and in the following cases:

- Deselecting the Sport mode (depending on equipment).

- With a manual gearbox: vehicle speed exceeds 2.5 mph (4 km/h).

- With an automatic gearbox, in mode N, vehicle speed exceeds 0.6 mph (1 km/h).

In these cases, this indicator lamp flashes for a few seconds, then goes off.

Malfunctions

In the event of a fault with the system, this warning lamp flashes for a few moments on the instrument panel, then remains on, accompanied by the display of a message.

Have it checked by a CITROËN dealer or a qualified workshop.

The vehicle stalls in STOP mode

All of the instrument panel warning lamps come on if there is a fault.

► Switch off the ignition then start the engine again with the key or the START/STOP button.

12 V battery

The Stop & Start system requires a 12 V battery of specific technology and specification.

All work must be carried out only by a CITROËN dealer or a qualified workshop.