Table of contents: Engine immobilizer 🠇 Anti-theft alarm system 🠇
Note: This information only applies to later systems fitted as standard equipment by Peugeot/Citroen. On early models, a push-button panel was used to disable the immobilizer. At the time of writing, no information was available on the early type of keypad.
Engine immobilizer
1. Engine immobilizer is a standard feature on most models. The system is automatically activated each time the key is inserted into the ignition switch.
2. The immobilizer ensures that the car can only be started with the original Peugeot/Citroen ignition key. The key contains an electronic chip (transponder), into which the code is programmed. When the key is inserted into the ignition switch, it uses the current present in the sensor ring (which is installed on the ignition switch housing), to send a signal to the immobilizer electronic control unit. On vehicles prior to the 2001 model year, the control unit is located under the dashboard on the driver's side. On vehicles after the 2001 model year, the ECU is integrated into the BSI multi-function electronic unit (see paragraph 22). The ECU checks this code every time the ignition is turned on. If the key code does not match the ECU code, the latter disconnects the electrical circuits of the starter, fuel supply and ignition (whichever is applicable), to prevent the engine from starting.
3. When the vehicle is new, a confidential security card is provided along with other vehicle documentation. This card contains a security code that your Peugeot/Citroen dealer will require when carrying out any work on the immobiliser system. Keep this card in a safe place at home; never store it in a car. If your ignition key is lost, you can obtain a new one from a Peugeot/Citroen dealer. Provide the confidential security card and all available keys to your Peugeot/Citroen dealer, who will issue a new key and reprogram all keys with the new security code. This will make the lost key invalid.
Warning. Without a confidential security card, it will be impossible to program keys and reprogram the immobilizer system.
Advice: If you've purchased a used car, it's recommended that you reprogram all keys and the immobilizer system with the new security code as a precaution. This will ensure that the only keys that can start the vehicle and invalidate all other keys are the keys in your possession.
4. For any problems related to the immobilizer, please contact your Peugeot/Citroen dealer.
Anti-theft alarm system
5. Most models described in this manual have an anti-theft alarm system as standard equipment. On all other models the system is offered as an option (at the client's request). The anti-theft alarm is automatically activated when the vehicle is locked using the remote control and is deactivated when the doors are unlocked using the remote control. The anti-theft alarm system includes switches located on the hood, trunk lid and each of the side doors, and on some models is also supplemented by an ultrasonic interior scanning system (volumetric control), which detects movement inside the vehicle using sensors installed on both sides of the vehicle's interior.
6. Detailed information on the operation of the anti-theft alarm system, depending on the model, is provided in the Owner's Manual supplied with the vehicle. They are not presented here for obvious security reasons.
7. If the anti-theft alarm system fails, you should contact a Peugeot/Citroen dealer to have the vehicle checked.