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 1,000 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: On cold start it take long time until it cutch 90 degrees and all that time keep cold/high rpm about 1200

There are many causes of hard starting but illustrative ones are a faulty engine coolant temperature switch (sensor), worn spark plugs, inadequate fuel delivery or pressure (clogged fuel filter), and contaminated or old gasoline. When the engine is cold, high...

Q: Electrical problems on a 1990 Ford Mustang GT

You've got electrical problems. First, you'd want to check all the fuse boxes and all the fuses and relays. See if anything's blown or not getting power and if anything's out. If they all went out at once, you've got...


Hi Braxdon. Thanks for contacting us today. Of the error codes you've listed, the one that might be the root source of your problems is the P2138 OBD-II Trouble Code. The P2138 trouble code indicates that the Engine Control Module...

Related articles

What Causes Hoses to Leak?
While the largest part of your engine is mechanical, hydraulics plays a significant role. You’ll find fluids at work in a number of different areas. Your car's fluids include: Engine oil Transmission...
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...
What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...