Disconnect the battery for 15 - 20 minutes. If that doesn't work, you might have to have a dealership reprogram the ECM to reset it. I'd recommend you call a dealership and talk to a representative from their service department before you try doing anything on your own.
There are several possible solutions to reset the immobilizer, assuming you can get into the car, the reset can be done by putting the key into the ignition and leaving the key there without starting the car.
To reset the immobilizer on a 1995 Citroën Xantia, you typically need to use the vehicle's key. Insert the key into the ignition and turn it to the "On" position without starting the engine. Leave it in this position for about 10 minutes until the immobilizer light goes off, then turn the key back to "Off" and try starting the car. If issues persist, consult the vehicle's manual or a professional mechanic for further assistance.
You can reset the immobilizer on a Citroen C4 in one easy step. Simply insert the key into the ignition and turn it very slowly.
Service Light Reset - Citroen Xantia (1997 on)Using button located within speedometer dial.Switch the ignition off.Press and hold button.Switch on the ignition.Keep the button depressed.Service Interval and "spanner" symbol will illuminate for five seconds
To reset the electric immobilizer you must put the key into the ignition and slowly turn it. You should see the lights in the car start to turn on. It does not work if you turn the key too fast.
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To reset the immobilizer in a Citroën Saxo, you typically need to use the vehicle's key. Insert the key into the ignition and turn it to the "On" position without starting the engine. Leave it in this position for about ten minutes, allowing the immobilizer system to reset. Afterward, turn the key off, wait a few seconds, and then try starting the engine again. If issues persist, consulting the owner's manual or a professional may be necessary.
put your key into the ignition but do not turn the key leave for 30 seconds then start if this dose not work the battery in your key fob may be flat
There is no known way to reset the Kia Sephia immobilizer. It is best to go to a Kia auto dealer or repair shop to see what needs to be done in order to reset the immobilizer.
The immobilizer on a Peugeot 207 can be reset by removing it and reinstalling. Another option is to install a new reader.
In order to reset the immobilizer on a Vauxhall Zafira 16v auto, first switch on the car's ignition. Then, press any of the buttons on the keyfob while the car is still in the ignite position, which will reset the immobilizer. At this point, if the car's immobilizer has been reset, it will perform the lock/unlock sequence.