Q: Truck computer not recognizing key.

asked by on

My truck will not crank. When the key is in the ignition, the theft light blinks fast and the truck will not turn over. I think it might have something to do with the computer not recognizing the key.

The Ford PATS (Passive Ant-Theft System) will react like this when the key is not recognized. The key not being recognized could be one of 3 factors, bad key, faulty PATS antenna ring, or a faulty PATS computer. Try all available keys first to make sure it is not just one faulty key causing the problem, then you may want to enlist the help of a mechanic, like one fromYourMechanic, to use a scan tool to interrogate the PATS system to determine the faulty component and recommend the proper repair.

Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  1. Home
  2. Questions
  3. Truck computer not recognizing key.

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

Get a quote

What others are asking

Q: Odometer reading is about 550,000 miles off.

Hey there. This is a problem with the Body Control Module (which keeps a copy of actual mileage) not re-updating the instrument cluster appropriately after a power outage. Contact your Saturn dealer service center for "Subject: 2000 - 2002 Saturn...

Q: How do I use the keyless access system to unlock the car?

If your vehicle is equipped with the keyless access system, then you will be able to unlock your vehicle without using the keys. To use the keyless access system, you need to have the remote keyless entry (RKE) transmitter within...

Q: Was driving in D pressed the pedal car wouldn't move engine revs up but car doesn't move forward.. It's fine now

The manufacturer has a technical bulletin to cover this problem. They would first check for any standing transmission problems then reprogram the PCM power train control module to the latest levels. Get in touch with your dealer to have this...

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the...