Anti-theft Immobilizer problems
Anti-theft Immobilizer: Security system that prevents the car from starting if the ignition key is not the correct one.
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What is the immobilizer on an Expedition? Why does it fail?
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See owner's manual
Top problems
Anti theft device
Ford Expedition 1998 Eddie bauer 5.4l v8 4x4 111953 miles
Lights keep blinking turns on but engine wont start this just happened suddenly never has happened in all the years i have tge truck
23 reports
8
SO
Mi tuck wouldn't start it was my neutral safety system was going out
Vote helpful8
AL
Same here we have a red wire that goes into the fuse box and can’t figure out where it goes after it came out. Any idea to what we can hook it up too or what it’s for.
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TO
My expectation just quit running out of the blue today and will not Crank up now
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FO
Relay bad did u check you relays starter solenoid?
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GR
Same here red wire that's not connected anywhere but I have no clue where it goes 2004 expedition XLT 5.4
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JI
I'm having similar issues with anti theft. It's happened before and I found a fix that's not working this time. Did any of these help and if so which one
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CJ
What worked for you last time?
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CommentAnti theft code 11
Ford Expedition 2000 5.8 200000 miles
I was driving my 2000 ford expedition and it shut off out of no where i havent been able to restart since even changed fuel pump but no luck the anit theft code comes up as code 11 but. Cant seem to fix or fi d the issue
3 replies
Do you hear your fuel pump when you turn the key forward if not have you try to straight wire your fuel At your fuse box . Does it have a sunroof I don’t know if it happens on all models but something with the drainage of the sunroof get the back of the fuse panel wet oh you know what happens. I have an 03 had aSimilar issue and learned it was five relays integrated into circuit board In the middle one is for the fuel pump relay
It is going to be a problem with your key ( the chip inside) signal getting blocked. An causing the anti theft from letting it start from keeping the fuel pump an coil fire.
Hey I'm wondering if you got this fixed? I'm have similar issues. The previous owner had same exact thing happen. As I bought it I called locksmith, after $150+ he plugged in his computer and it worked for about 6 months. Since then my anti theft light comes on and it won't start. I replaced a ignition switch under steering column and it worked, until it didn't. I was told by multiple people that it was the key and the little chip. But the locksmith says no it's the computer. Which is why I'm looking for more answers and found this. I hope you solved your problem. I'm continuing to deal with mine.
CommentNo start anti theft light os on...
Ford Expedition 2007 5.4 liter suv 171562 miles
Security light flashes. Turns over but wont start...had to replace battery turns over but will not run...
2 reports
tyrone_003 from United States 4 months ago
I hear one click but will not start battery light/check engine light/oil light/anti theft light/and coolint light all one
CommentSizzling or hissing sound. 
Solved
Ford Expedition 1998 5.4 Eddie bauer 193041 miles
Today, my truck started making noises underneath dashboard driver's side around the back of the fuse box area. I'm not sure why. But but I pulled number 22 fuse And number 15. 22 Is something to do with the airbags? And 15 is something to do with\n Anti-theft system.
1 reply
Best answer (according to Fear of fire!!!!)
Fear of fire!!!! from United States 6 months ago
I did a complete system reset. I haven't heard then noise since.
CommentStarter/no start
Ford Expedition 2010 5.3 200000 miles
I replaced the starter also the alternator and the battery also the serpentine belt anti theft had came on but I ended up reprogramming it and it still won’t crank almost like if the truck had low battery
3 reports
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