2018 Ford F-150 Key Fob Programming & Replacement Guide

The 2018 Ford F-150 is one of the most popular trucks on the road, but losing a key fob can quickly throw a wrench in your day. As a locksmith and ASE-certified electrical technician, I see this issue constantly. Whether you have the standard flip key or the push-to-start smart key (PEPS), replacing and programming a new fob doesn't always have to involve a hefty dealership bill—provided you already have your original keys.

Here is everything you need to know about programming a new key fob for your 2018 Ford F-150.

Quick reference

Step-by-step on-board programming

Ford's Passive Anti-Theft System (PATS) allows you to program a third key yourself, but a major security catch exists: you must already have two working, programmed keys. If you only have one working key, on-board programming is disabled, and you will need a professional scan tool.

For standard ignition (Flip Key)

1. Insert the first working key into the ignition and turn it from OFF to ON (Run position, engine off).
2. Leave it in the ON position for at least three seconds, but no longer than 10 seconds.
3. Turn the ignition OFF and remove the first key.
4. Within 10 seconds, insert the second working key and turn it from OFF to ON.
5. Leave it in the ON position for at least three seconds, but no longer than 10 seconds.
6. Turn the ignition OFF and remove the second key.
7. Within 10 seconds, insert the new, unprogrammed key (which must be cut to fit the ignition) and turn it from OFF to ON.
8. Leave it in the ON position for at least six seconds.
9. The door locks will cycle, or a message will appear on the dashboard confirming the programming is successful.

For push-to-start (Smart Key)

1. Place the first working smart key in the backup slot (usually located in the front cup holder or center console under the rubber mat).
2. Press the START/STOP button once (do not step on the brake). Wait three seconds.
3. Press the START/STOP button again to turn the system OFF. Remove the first key.
4. Within 10 seconds, place the second working smart key into the backup slot.
5. Press the START/STOP button once. Wait three seconds.
6. Press the START/STOP button again to turn the system OFF. Remove the second key.
7. Within 10 seconds, place the new, unprogrammed smart key into the backup slot.
8. Press the START/STOP button once. The hazard lights will flash, and the instrument cluster will confirm the key is programmed.

Battery replacement

If your fob is acting up, try a battery replacement before buying a whole new key.

• Flip keys take a single CR2032 battery. You can pop the back cover off using a small flathead screwdriver in the pry notch.
• Smart keys take a single CR2450 battery. Remove the emergency key blade first, then use a flathead screwdriver or coin to gently pry the two halves of the fob shell apart. Replace the battery with the positive (+) side facing up, and snap the shell back together.

Where to buy a replacement fob

When sourcing a replacement key for your 2018 Ford F-150, you have a few options:

• The Dealership: This is the most reliable but most expensive route. Expect to pay between $200 and $350 for the OEM key, plus an additional $100–$150 for cutting and programming if you don't have two working keys.
• A Mobile Locksmith: Highly recommended. Automotive locksmiths carry high-quality aftermarket or refurbished OEM fobs (like Strattec). They can cut the high-security blade on-site and program the transponder for usually 30% to 50% less than the dealer.
• Amazon or eBay: You can find aftermarket keys online for $20 to $50. While this is the cheapest option, quality is a mixed bag. Many cheap online fobs have inferior transponder chips that may fail to program or lose memory after a few months. You will still need to pay a locksmith to laser-cut the blade.

If on-board programming isn't supported

If you've lost all your keys, or you only have one working key remaining, you cannot use the DIY on-board programming method. The vehicle's immobilizer requires a secure handshake that can only be authorized by an advanced diagnostic scan tool connected to the OBD-II port.

In this scenario, a mobile automotive locksmith is your best bet. They will use specialized equipment (like an Autel or Smart Pro programmer) to securely bypass the PATS security gateway, delete lost keys from the vehicle's memory to prevent theft, and program your new transponder keys. Expect to pay $150 to $250 for this service, depending on your location and the type of key required.

Find a mobile locksmith or shop on Repairius.