Does my Ford key fob have sleep mode?

Since 2019 overseas and 2021 in the US, Ford has been putting a motion sensor inside its key fobs. All the sensor does is notice when the fob has stopped moving. Leave the fob sitting still for about a minute, on the counter or in the bowl by the door, and it goes to sleep and stops answering the vehicle. Pick it up and it wakes back up.

Ford did this because of a theft method called a relay attack. A keyless vehicle is always listening for its fob, and the fob is always ready to answer, but only from a few feet away. Relay theft stretches that distance. One thief stands outside your house with a receiver and an amplifier tuned to the fob. A second thief stands at your driver's door with a transmitter. The fob's reply gets picked up inside the house, relayed out to the driveway, and played back at the door. The vehicle hears its own key, unlocks, and starts. No forced entry, no alarm, and the fob never left the hook by the door. The whole thing takes under a minute, and it works best late at night, when the keys are hanging where they always hang.

A sleeping fob doesn't answer, so there's nothing to relay. Thatcham Research, the UK body that rates vehicle security for insurers, described it this way in 2019: "Motion sensors inside the fob detect when it has been stationary for a period and trigger a sleep mode. This means the fob will no longer respond to attempts to relay its signal." Ford models with the sleeping fob passed Thatcham's relay attack test that year.

Which Fords and Lincolns have a sleeping fob

Ford documents the sleeping fob in each model's owner's manual, under Keyless Entry Limitations, with the same sentence every time: "The remote control remains stationary for about a minute." We read every US Ford and Lincoln owner's manual from 2019 through 2026. The years below are the ones where that sentence appears. If a year is missing, it means Ford's manual doesn't mention the feature. It doesn't mean the fob lacks it, and the test at the end of this section settles it either way.

Not documented in any year through 2026: E-Series vans, Transit, and older nameplates such as Fusion, Fiesta, Flex, Taurus, EcoSport, Continental, MKC, MKT and MKZ.

The fob looks the same as the older one, so the shape and the badge tell you nothing. Here's the test. Set the fob down and leave it alone for a full minute. Then walk to the vehicle and pull the door handle. If the door opens, your fob isn't sleeping. If it stays locked until you go back and pick the fob up, it is.

If your fob doesn't sleep

A signal-blocking pouch, usually sold as a Faraday pouch, is a small lined bag that keeps the fob's signal from getting out. Keep the fob in the pouch at home and it can't be relayed, whatever year the vehicle is. Thatcham's advice for owners without a sleeping fob is the same: keep the fob in a Faraday pouch at night, and test the pouch yourself by dropping the fob in, walking to the vehicle, and checking that the door stays locked. Older Fords with keyless entry fall into this group, and so does any make that never adopted a sleeping fob. This Faraday pouch on Amazon is the kind we mean. The product photo shows a Ford fob in it.

What a sleeping fob doesn't do

It won't protect the vehicle while the fob is moving. In your pocket, walking through a parking lot, the fob is awake. And it does nothing for a fob that's been lost or stolen. That key will keep starting the vehicle until someone with the right equipment deletes it from the vehicle's memory.

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