The C4’s parking sensor system is interconnected. This means that if… just one If one of the sensors (usually 4 at the rear) malfunctions or is disconnected, the control unit deactivates the entire system for safety reasons to prevent collisions due to lack of readings.
- Focused Model: Citroën C4 (Hatch, Pallas, VTR and Lounge).
- Common Symptoms:
- Continuous Whistling: Usually caused by excessive dirt, ice, or a sensor that has been impacted and “sunk” into the bumper, reading the car’s own structure.
- Error Message: It appears on the on-board computer as soon as reverse gear is engaged.
- Location of Protection: The fuse that powers the parking assistance module is located in BSI (Integrated Services Box), inside the cabin (dashboard).
- Correct Fuse: It’s usually the fuse. F12 or F14, with amperage of 15A (Depending on the manual version, it shares the accessory and instrument panel lines).
Causes of the Problem and Diagnosis:
- Coupling Interference: If you recently installed a trailer hitch, the hitch “ball” might be in front of one of the central sensors, causing the system to beep continuously.
- Water infiltration: Washing with high-pressure washers directly on the sensors can damage the internal seal, causing a short circuit in the sensor.
- Simple Test: With the ignition on and reverse engaged (car off for safety), lightly place your ear against each sensor. A functioning sensor will emit a very low, quick click (sounds like a “tick-tick-tick”). The sensor that is silent is the one that is faulty.
🔧 Vai comprar peças ou acessórios para seu carro?
Antes de fechar a compra, compare os preços nas maiores lojas do Brasil. Ao comprar através dos nossos links você não paga nada a mais e ainda ajuda a manter o Auto Francês no ar. ❤️
* Podemos receber uma pequena comissão pelas compras realizadas através destes links, sem qualquer custo adicional para você.