Citroën C4 2021 Handbook
![Citroën C4 2021 Crossover manual cover](/images/RzrPHxXvAtdjWjhZBheTfsuO/thumbs/thumb175x175.webp)
To reset the service light, turn the ignition to the "On" position without starting the engine. Press and hold the trip reset button on the dashboard. After a few seconds, the service light should reset.
The recommended tire pressure for the Citroën C4 2021 Crossover is typically 32 PSI for the front tires and 29 PSI for the rear tires. Always check the owner's manual or the sticker on the driver's side door jamb for exact specifications.
To pair your smartphone, enable Bluetooth on your phone and go to the car's infotainment system. Select "Phone" and then "Pair Device." Choose your phone from the list of available devices and confirm the pairing code on both the infotainment screen and your phone.
For optimal performance, use a 5W-30 synthetic engine oil that meets the ACEA C2 specification. Always refer to the owner's manual for the most accurate information.
To replace the cabin air filter, locate it behind the glove box. Remove the glove box by releasing the side tabs and lower it. Then, remove the filter cover and slide out the old filter. Insert the new filter, ensuring the airflow arrows are pointing in the correct direction, and reassemble the glove box.
If the engine won't start, first check the battery connections to ensure they're tight and corrosion-free. Verify that the battery is charged. If these are fine, check the fuses and the starter motor. If the problem persists, consult a professional mechanic.
To update the navigation system, download the latest map updates from the Citroën website onto a USB drive. Insert the USB into the car's USB port and follow the on-screen instructions to complete the update process.
To check the brake fluid level, open the hood and locate the brake fluid reservoir. Ensure the car is on a level surface and the engine is cool. The fluid level should be between the 'MIN' and 'MAX' marks. If it's low, add the recommended brake fluid as specified in the owner's manual.
To change a flat tire, secure the vehicle on a flat surface and turn on the hazard lights. Use the lug wrench to loosen the lug nuts, then use the jack to lift the car. Remove the lug nuts and replace the flat tire with the spare. Tighten the lug nuts in a crisscross pattern and lower the vehicle.
Common reasons for the check engine light to illuminate include a loose fuel cap, faulty oxygen sensor, malfunctioning catalytic converter, or issues with the ignition system. Use a diagnostic tool to identify the specific error code for more precise troubleshooting.