As of October 2026, "Key ID Incorrect" on a Nissan or Infiniti means the car detected a key and did not recognise it as one of its own. It is not a dead-fob message. The usual causes are the wrong fob, a fob that was never registered to this car, a registration that was wiped during other work, or a weak fob battery garbling the exchange. If the answer is a new Intelligent Key, the published Fort Worth band is $220 – $450, programmed at the vehicle. Call or text 817-674-2304 with the year, model and the exact wording on the display.
Two Messages That Get Confused
Nissan and Infiniti show several key warnings, and two of them are regularly mistaken for each other. They mean different things and lead to different repairs.
| Message on the display | What the car is telling you | Where to look first |
|---|---|---|
| Key ID Incorrect | A key responded, but it is not registered to this vehicle | The fob's identity: wrong fob, unregistered fob, lost registration |
| No Key Detected | No key responded at all | The fob's power and position: dead battery, fob left outside, interference |
| Key Battery Low | The fob answered, weakly | Replace the fob's coin cell soon |
| Key System Error or a key warning light that stays on | The system itself has a fault | The vehicle: antenna, steering lock, control module |
Nissan's own owner's manuals describe Key ID Incorrect as the indicator shown when the ignition is pushed and the Intelligent Key is not recognised by the system, and add that the engine cannot be started with an unregistered key. That is the whole message in one sentence: the car is not saying it cannot find a key. It is saying it found one and the answer was no.
Read the wording on the display exactly, and say it exactly when you call. It is the single most useful fact in the diagnosis. The other message has its own page: no key detected.
Why the Car Is So Strict About It
An Intelligent Key and the car hold a short encrypted conversation every time you press Start. The car asks a question only a registered key can answer. If the answer is wrong, the car does not try harder or accept something close. It refuses.
That is by design. The Insurance Institute for Highway Safety and its Highway Loss Data Institute have reported for years that vehicles with immobilizers are stolen less often than comparable vehicles without them. A system that accepted a nearly-right key would not be much of a system. So when you see Key ID Incorrect, the security is working. The question is why your key is on the wrong side of it.
Cause One: It Is the Wrong Fob
This is more common than anyone expects, and it is free to fix.
Nissan and Infiniti used the same few fob shapes across many models and many years. A household with an Altima and a Rogue, or a Pathfinder and a QX60, often has four fobs that look identical in a bowl by the door. Pick up the other car's fob and you get exactly this message: a valid Nissan key, speaking the right language, registered to a different vehicle.
Check which fob you are holding. If there is another Nissan or Infiniti in the household, in the office car park, or belonging to whoever dropped you off, rule this out before anything else.
Cause Two: The Fob Was Never Registered to This Car
A fob is not a working key until the vehicle has been told to accept it. Three situations produce a fob that looks right and is not registered.
A fob bought online. It may be the correct part and still be blank as far as your car is concerned. It can lock and unlock nothing and start nothing until it is programmed.
A used fob from another vehicle. Many later Intelligent Keys cannot be registered to a second car once they have been paired to a first. A used fob from a salvage yard or a marketplace listing can be the right shape, carry a good battery and still be unusable.
A spare handed over with a used car. Sometimes the second fob in the envelope belonged to a different vehicle on the same lot. It unlocks nothing and produces Key ID Incorrect on the first try.
In all three cases the fix is registration with a fob the car can accept. Our key fob programming page describes the service.
Cause Three: The Registration Was Lost During Other Work
This is the one that catches people out, because the key worked last week.
On Nissan and Infiniti, keys are typically registered as a set. When a new key is added, the session rebuilds the list of accepted keys from the ones presented at that moment. Any key that was not in the car during that session can drop off the list.
So the sequence goes: you had a spare made, or the dealer programmed a replacement, and the fob that was at home in a drawer that day now shows Key ID Incorrect. Nothing is wrong with it. It simply was not in the room when the list was rebuilt.
The same thing happens after a body control module is replaced or reconfigured. A replacement module does not know your keys until they are registered to it.
The fix is another session with every key present. This is why we ask you to bring all of them, including the one you never use. The limits are explained in how many keys can my car hold.
Cause Four: A Weak Fob Battery Garbling the Answer
A nearly flat coin cell usually produces No Key Detected or Key Battery Low. Occasionally it produces Key ID Incorrect instead, because the fob transmits enough for the car to hear something and not enough for the exchange to complete cleanly.
The test is simple. Hold the fob directly against the Start button, or put it in the fob port on models that have one, and press Start with your foot on the brake. That method powers the exchange at very short range and does not rely on the fob's battery. If the car starts, replace the coin cell with the type specified in your owner's manual.
If you already changed the battery and the fob still misbehaves, the cause is elsewhere. We covered that case in new fob battery, still not working.
Cause Five: Interference
The exchange between fob and car is a low-power radio conversation, and other things in the cabin can talk over it.
Common culprits are a second key fob on the same ring, a phone lying on top of the fob in a cup holder or on a wireless charging pad, and aftermarket electronics plugged into the dash. Take the fob off the ring, move it away from the phone, and try again. An intermittent version of this problem, where the message comes and goes, is described in key fob works sometimes.
Cause Six: The Vehicle's Own Battery
Low system voltage makes modules behave unpredictably. A car that has sat for weeks, or one with an old battery after a run of short trips, can produce key warnings that have nothing to do with the key. If the interior lights are dim or the car has recently needed a jump, deal with that first and re-test. The longer version is in the car sat for weeks and now the key does nothing.
Cause Seven: A Fault in the Car
Least common, and the one to consider only after the others are ruled out. If every fob the car has ever accepted now shows Key ID Incorrect, at close range, with good batteries all round and nothing recently changed, the suspect is the vehicle: an antenna, the wiring to it, or the control module that holds the key list.
This is diagnosed with equipment, not by elimination. It is module work rather than key work, and it is quoted per vehicle. Our module programming page describes what that involves.
The Five-Minute Driveway Check
In order, cheapest first:
- Confirm it is the right fob for this car.
- Read the display and note the exact wording.
- Hold the fob against the Start button, or use the fob port, and try to start.
- Take the fob off the ring and away from phones and chargers. Try again.
- Try the second fob if one exists. This is the most diagnostic step on the list.
- Check the car's battery. Dim lights or a recent jump start change the picture.
- Think back two weeks. A new key, a module repair, body work, an alarm or remote-start install.
How to read the result:
- Second fob works, first does not: the first fob has failed or dropped off the key list. A key job.
- Neither fob works, and keys were recently programmed or a module replaced: registration was lost. A programming job with all keys present.
- Neither fob works and nothing changed: vehicle-side fault. A diagnosis.
- Starts with the fob against the button: fob battery.
What a Fix Costs in Fort Worth
These are our published bands from the car key replacement cost page.
| Outcome | Cost basis |
|---|---|
| Fob battery | A coin cell from any pharmacy or parts counter |
| New Intelligent Key, programmed, with another working key present | $220 – $450 |
| New Intelligent Key when no working key remains | $220 – $450 plus $50 – $200 |
| Vehicle-side fault: antenna, wiring or control module | Quoted per vehicle after diagnosis |
| Tow to a dealer, if you go that route with a car that will not start | $75 – $200+ |
Re-registering existing good fobs after the list was wiped is programming work on keys you already own. Tell us that is the situation when you call and we will quote it for your vehicle.
Model-specific detail is in Nissan Rogue and Murano spare Intelligent Keys, Nissan Pathfinder and Armada, Infiniti QX50 and QX55 and Infiniti QX80 and QX60.
When to Stop and Call
Call a professional when:
- the second fob fails the same way as the first;
- the message appeared right after key programming or module work somewhere else;
- you have one fob, it is showing this message, and it is your only way to start the car;
- the message is joined by a steering lock warning or the car will not power on at all.
Do not keep buying fobs. A second online fob will show the same message as the first if the underlying issue is registration, and a third will too.
When we arrive, the order is fixed. Ownership is verified with registration or title and photo ID, which is the standard the National Automotive Service Task Force applies to independent security professionals. Battery voltage is checked. The vehicle is read to see how many keys are registered and what it reports when each fob is presented. Then the decision is made between key, registration and module.
It is also worth a minute on the National Highway Traffic Safety Administration recall lookup with your VIN, in case an open campaign touches the systems involved.
Who You Call Matters
Texas licenses locksmith companies through the Texas Department of Public Safety Private Security Program, not TDLR. Ask for the licence number and check it.
The Federal Trade Commission and the Better Business Bureau both warn about locksmith listings that advertise a low headline price and dispatch an unknown subcontractor. On an immobilizer problem the cost of a bad choice is more than money. An operator who does not understand that Nissan keys register as a set can wipe your one good key while adding a new one.
Mobile Service Across Fort Worth and Tarrant County
A car showing Key ID Incorrect often cannot be driven anywhere, so we come to it: Fort Worth and nearby cities including Arlington, Hurst, Bedford, Euless, Haltom City, Keller and North Richland Hills.
The related services are push to start keys and key fob replacement.
Frequently Asked Questions
What does Key ID Incorrect mean on a Nissan?
It means the car detected an Intelligent Key and did not recognise it as registered to this vehicle. Nissan's owner's manuals describe it as the indicator shown when the ignition is pushed and the key is not recognised, and note the engine cannot be started with an unregistered key.
Is Key ID Incorrect the same as No Key Detected?
No. No Key Detected means no key answered at all, which usually points to a dead fob battery or a fob left outside the car. Key ID Incorrect means a key answered and was rejected, which points to the key's identity or registration.
Can a weak fob battery cause Key ID Incorrect?
Occasionally. A nearly flat coin cell can transmit enough for the car to hear something without completing the exchange. Hold the fob against the Start button or use the fob port. If the car starts that way, replace the battery.
My spare stopped working after I had a new key made. Why?
Nissan and Infiniti keys are typically registered as a set. If the spare was not in the car when the new key was programmed, it can be dropped from the list. It needs to be registered again with every key present.
Will a fob I bought online fix it?
Only if it is the correct part, has not been locked to another vehicle, and is then programmed to yours. An unprogrammed fob shows the same message. Many used fobs cannot be registered to a second car at all.
How much does it cost to fix Key ID Incorrect in Fort Worth?
If the answer is a new Intelligent Key, the band is $220 – $450 programmed at the vehicle, plus $50 – $200 if no working key remains. A fob battery costs a coin cell. Vehicle-side faults are quoted per vehicle after diagnosis.
Can I drive with the Key ID Incorrect message showing?
If the engine is already running, the car will generally keep running, but it may not restart once switched off. Do not turn it off somewhere you cannot afford to be stranded until you know which fob the car accepts.
Does this mean my car's computer is bad?
Usually not. The common causes are the wrong fob, an unregistered fob, a lost registration and a weak fob battery. A module fault is considered only when every known-good fob is rejected at close range and nothing has recently changed.
Tell Us the Exact Words on the Display
Call or text 817-674-2304 with your year and model, the exact message, whether a second fob behaves the same way, and anything that was done to the car in the last couple of weeks. That is usually enough for us to tell you which of the seven causes you are looking at before anyone drives out.
Article written by the Fortworthlocksmithexperts Automotive Locksmith Team. For mobile automotive locksmith service throughout Fort Worth and Tarrant County, contact us at 817-674-2304.
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