How to Program a Honda Key Fob (DIY, Dealer, or Locksmith)

Honda keys have two separate jobs to program. The buttons talk to the keyless entry receiver, and the transponder chip talks to the Honda Immobilizer System, often called HISS. Honda has long allowed owners to program the first part with the ignition and a button. The second part has always needed diagnostic equipment.

That split explains most Honda key frustration: a new remote head key can lock and unlock the doors perfectly and still refuse to start the engine. Here is how to handle each Honda key type, including Civic, Accord, CR-V, Fit, HR-V and Ridgeline.

Honda key types at a glance

Years overlap because Honda used different keys for different trims. A base LX may have a remote head key while an EX of the same year has a smart key.

What you need before you start

• A replacement that matches your FCC ID and part number. The FCC ID is on the back of the remote or inside the case.
• A good battery. Many older Honda remote head keys use a small cell such as a CR1616 or CR1620 (check the one in your key), while many newer keys and most smart keys use a CR2032. Our Honda key fob battery guide lists sizes by model.
• Every remote you want to keep. Honda’s onboard mode stores only the remotes pressed in the session (usually up to three).
• A cut key if your new fob has a blade, and a working key to switch the ignition on.

Honda key fob programming instructions (remote buttons)

This sequence works on a wide range of Hondas with a separate remote or remote head key, roughly from the mid-1990s to the early-to-mid 2010s. Do it with the doors closed and work at a steady pace; each step has a short window of about one to four seconds.

1. Sit in the driver’s seat with all doors closed.
2. Turn the ignition to ON (position II). Do not start the engine.
3. Within about 1 to 4 seconds, press and release LOCK on the remote.
4. Turn the ignition back to OFF (position 0 or LOCK).
5. Repeat steps 2 to 4 until you have done the ON, press LOCK, OFF cycle four times. On the fourth cycle, the door locks cycle to show you are in programming mode.
6. Within about 10 seconds, press LOCK on the remote again. The locks cycle to confirm.
7. Press LOCK on each additional remote within about 10 seconds of the last one; the locks cycle for each.
8. Turn the ignition OFF and remove the key to exit. Test every remote.

Some years use a slightly different count or require the first press to come from an already working remote. If the locks never cycle after several careful attempts, your model may not support onboard programming. Check the “Keyless Remote” section of the owner’s manual.

Programming the Honda immobilizer chip

The transponder in a Honda key must be registered to the immobilizer control unit. Honda has never offered an owner-level procedure for this. The options are:

• Honda dealer: uses Honda’s diagnostic software and a security code tied to the VIN. Bring proof of ownership. Dealers typically register all keys during the visit.
• Automotive locksmith: most carry tools with Honda immobilizer coverage for add-key and all-keys-lost jobs on common models, often at a lower price than the dealer.
• Your own IMMO-capable programmer: some owner-level tools cover Honda add-key procedures; check the coverage list carefully. Our guide to OBD2 scanners for Honda explains what basic scanners can and cannot do.

A key that unlocks the doors but makes the green key light blink and the engine refuse to start is the classic sign that the remote was programmed but the chip was not.

Honda smart keys (push-button start)

Smart keys on the Accord, Civic, CR-V, HR-V, Pilot and Ridgeline register the remote and immobilizer together through the diagnostic port. There is no onboard button sequence. A locksmith or dealer is the normal route, and on many recent models the dealer process requires an online security check. If the dash shows a key not detected message after programming, see our guide on Honda keyless remote problems.

Model notes: Fit, CR-V, HR-V, Civic and Ridgeline

• Civic (2006-2011): remote head key or separate remote depending on trim; the onboard sequence above works on many cars. Chip programming needs a tool.
• CR-V: 2007-2016 turn-key models are usually DIY for the remote portion; smart-key trims from about 2015-2017 on are tool jobs.
• Fit: remote head keys on most trims; smart key on some later EX trims.
• HR-V (2016-2022): remote head key on LX, smart key on higher trims. Check the 2016-2018 manual to see whether onboard remote programming is listed before buying a tool.
• Ridgeline (2017 on): smart key on most trims, so plan on a locksmith or dealer.

If Honda key fob programming does not work

• Locks never cycle: you are missing the 1 to 4 second window. Press LOCK immediately after turning to ON.
• Only one remote works: press each remote during the same session.
• Doors work, engine will not start: the chip is not registered; see the section above.
• Still nothing: work through our Honda key fob not working guide.

Honda key fob programming cost

See our full key fob programming cost guide, or go back to the main key fob programming guide.

Frequently Asked Questions