I recently bought a 1998 td mondeo, that only came with 1 dodgy key, managed to get a key and locking/unlocking fob that work brill, only problem is my old key i vary reluctant to work the immobiliser these dayz, is there any way to bypass this??
Cheers
Carl

carl, January 2008

immoblizer problem is not let me start my ford mondeo 2007

ali, September 2013

hepl

rory, December 2011

need help my 1997 mondeo petrol has had a exchange motor put in now it wont start cause theres no spark the battery was out for 4 weeks and the key imobiliser wont work everything has been checked and rechecked new coil everything done but no spark is it the imobilizer ,the code from the mechanic was p0603 does this help thanks

robbo, April 2011

Phil is correct i do this all the time and it works fine.
Thanks Phil for your advice

Matt, February 2009

Hi carl you can easily bypass the transponder on a ford diesel.What you have to do is remove the injector pump then take out the fuel cut off switch,drill it and fit a standard fuel cutoff switch.Then simply wire a positive from the ignition to the new fuel cut off switch and starter motor.re fit the new pump and its done.The car will take some starting for the first time as the diesel will be a pain to get through.Iv done this many times and it works every time.Email me at phil15432@hotmail.co.uk if you need to know anymore.

phil, July 2008

Hi carl. unfortunatley you can't by-pass it. You say your old key is reluctant to work? They usually work or not. In the key is a glass component that houses the immobiliser sensor, it is possible to swap it into the new key with care. By the year of manufacture, I would say you have the pear shaped fob. It has to be taken apart to remove the sensor. You will find the sensor mounted in rubber, gently ease it out and swap it with the one in the new key. Dont get them mixed up!!. You will have to reprogramme the remote locking again afterwards. That should sort your problem. The other answer is to take it to a Ford dealer for programming, an easy job when you have the right gear!!

Paul, January 2008