Skip the auto shop - Our mechanics make house calls

Q: No key detected warning

asked by on

The other day I drove my car and parked it for a while. After I came back to continue driving, the door wouldn't unlock. I managed to open one door and go into the car. However, when I attempted to start it up, there was a "no key detected" warning. What could be causing this?

Hi. It sounds to me like your battery ran out of juice. It’s most likely that the battery inside your key died and simply needs replacement. When your battery dies in your key you should be able to start your car as normally for a while. The trick is to try to start your car as normal but have the key fob hovering on top of the push start button while you’re pressing it.

The battery is a size CR1632. You can find them at places like Walmart or maybe even a grocery store. Very easy to replace and most people do it themselves. If you change it out and the problem persists, I’d suggest contacting a certified mechanic who can diagnose the starting issue and make the necessary repairs to your vehicle.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!
  1. Home
  2. Questions
  3. No key detected warning

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: No Power at All

You may have a bad negative cable to body attachment bolt that needs to be replaced under the battery tray. Technical service bulletin L-SB-0093-11 covers the replacement of the bolt and re-tapping the threads. The cable will not tighten and...

Q: Alarm

Hello. I think you have a faulty alarm system. You may want to try to disconnect the alarm system and reconnect it to see if you are getting the same problem. I believe your lights and alarm system problems are...

Q: My car doesn't start -1993 Lexus ES300

Hi there. Three main sensors missing cannot be a good thing but, your vehicle was apparently running without them. The valves are unlikely unless the timing belt broke. A head gasket issue is possible, considering you have been adding to...

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...
P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.