Q: No start anti-theft light blinks a code 1-6

asked by on February 17, 2017

I acquired a2001 ford expedition, it had no keys, I had keys made keys work but car still wont start.. rechecked keys, their good I think .car just turns over, still wont start.... its cost me a bunch of money already...

My car has an automatic transmission.

Your anti-theft light is blinking due to the theft system is activated and will not allow the vehicle to start. The code 16 is not something that is used by mechanics in the field but was used by engineers in the design of the system. A mechanic will need to scan the system for codes. I can tell you the key that is not coded to the truck will need to be programmed by the factory/ dealer scanner so the theft system sees the correct key that is programmed is used to start the vehicle.

The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing


Experienced Mechanic?

Earn up to $70/hr

What others are asking

Emergency brake pads
Typically, the braking system friction material should be inspected at every tire rotation. The parking brake is integrated with the rear brake calipers. When the brake pad friction material wears down to a low measurement, or the pad's thickness warning...
I have no brake lights but I do have tail lights working. I have no blown fuses either. Why do I not have brake lights?
You will need to test the brake light switch and its connector above the brake pedal on the bracket to see if the switch is being pushed in or released when the brakes are pushed. On some vehicles they will...
Starting issue, fuel smell
The fuel pressure would need to be checked to make sure the pressure regulator (https://www.yourmechanic.com/services/fuel-pressure-regulator-replacement) is not leaking fuel and that the pressure is correct. You may have a leaking injector (https://www.yourmechanic.com/services/fuel-injector-replacement) if the pressure is okay. I recommend having...
The car is misfiring.
Hi, thanks for writing in. There are many things that could cause a misfire (https://www.yourmechanic.com/article/how-can-problems-with-the-ignition-system-cause-misfiring_2), such as faulty spark plugs (https://www.yourmechanic.com/article/symptoms-of-bad-or-failing-spark-plugs), a bad coil pack (https://www.yourmechanic.com/article/symptoms-of-a-bad-or-failing-ignition-coil), bad injectors (https://www.yourmechanic.com/article/symptoms-of-a-bad-or-failing-fuel-injector), a faulty crank position sensor (https://www.yourmechanic.com/article/symptoms-of-a-bad-or-failing-crankshaft-position-sensor) or something else. I would...
Car battery light came on and while driving my car suddenly stalled and my steering wheel got really stiff
Your problem could be as simple as a broken accessory drive belt - sometimes called a serpentine belt. This belt drives both the alternator and power steering pump. It is also possible the engine stalled for some reason, with the...
98 zj 5.2 v8 with coolant leak but not overheating
The only way to make sure where it is leaking is to put pressure on the cooling system and then visual check the entire system to locate the leak. The water pump is the most common cause of the leak...
I want to change from automatic to standard transmission on my 84' chevy c10.
Hi there. Unfortunately this is not a service one of our mobile mechanics could offer, so we're not able to offer a quote or estimate. In regards to whether or not it can be done, the answer is "maybe". If...
2002 Dodge Ram 1500 won't start and has new motor
Hi Kim. Thanks for contacting us today. There are several items that cause an engine to not start, but sometimes it's best to consider the two main reasons why an engine won't start - fuel deliver or ignition failure. If...
What can cause a car to stop moving besides the transmission?
If the vehicle sounded like it was in neutral and not moving while in gear, this is quite likely related to a transmission issue, which may be any number of things. This may indicate a failing speed sensor (https://www.yourmechanic.com/services/transmission-speed-sensor-replacement). The...

Related articles

A Buyer’s Guide to the 2012 Ford Mustang
The The Ford Mustang has been an iconic vehicle for half a century, and its latest styling and updates only make it more attractive and more popular with American drivers. While its exterior may not be quite as eye-catching as...
How to Get Ford Dealership Certified
Ford car dealerships offer automotive technician jobs to mechanics who are certified through either the ASSET or the FACT program.
Ten Sports Cars That Double as Good Daily Drivers
The best daily driver is a car that's reliable, usable, and still fun to drive. Popular daily sports cars include the BMW M3, Subaru WRX, and VW GTI.