Skip the auto shop - Our mechanics make house calls
  1. Home
  2. Articles
  3. What Does the Ignition Switch Warning Light Mean?

What Does the Ignition Switch Warning Light Mean?

What Does the Ignition Switch Warning Light Mean?

Modern cars have multiple security measures in place to ensure that the correct key is being used to start the engine. Car keys are electronically coded specifically to work only with certain engines that have learned this code. Even if someone was able to copy the key and turn the ignition, the engine still would not start.

Without the correct key, it is very difficult to start the engine of most modern cars these days. Most vehicles have an ignition switch warning light to let you know of any problems occurring with the ignition.

What the ignition switch warning light means

Depending on the vehicle, this warning light could mean a few things. It could indicate an issue with the ignition switch or show that there is a problem with the key being used. An issue with the ignition switch is usually mechanical and it would prevent the key from turning. This may be caused by worn out tumblers, a worn out key, or if dirt and debris lodged in the mechanism prevents movement. You can try cleaning out the keyhole, but you may need to replace the switch and potentially even replace the key to fix the problem.

If this light comes on while you are driving, chances are the key can longer be verified. This is typically a computer glitch, and while rare, it can still happen. Since the key is no longer valid, it is likely that you will not be able to restart the engine once you have shut it off. Take the car immediately to an auto shop or service center where you can have the car relearn the key’s security code.

Is it safe to drive with the ignition switch warning light on?

In either situation, you should have the car checked out. While it is possible to do the key learning procedure without any special equipment, it typically requires two known, valid keys which could be difficult to gather, if you’re out and about. Any mechanical issues will also require cleaning or replacement of the ignition switch.

If you are having any troubles with your ignition switch, our certified technicians can help you diagnose any issues you may be experiencing.

The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
Icon-warranty_badge-02

Skip the repair shop, our top-rated mechanics come to you.

At your home or office

Choose from 600+ repair, maintenance & diagnostic services. Our top-rated mechanics bring all parts & tools to your location.

Fair & transparent pricing

See labor & parts costs upfront, so you can book with confidence.

12-month, 12,000-mile warranty

Our services are backed by a 12-month, 12,000-mile warranty for your peace of mind.

Get A Quote

Need Help With Your Car?

Our certified mobile mechanics make house calls in over 2,000 U.S. cities. Fast, free online quotes for your car repair.

GET A QUOTE

More related articles

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...
How to Buy Fuel Treatments
Adding a fuel additive to your gas tank when you fill up is one way to clean vital engine parts of deposits, improve the performance of your engine,...
Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...


Related questions

Q: My 96 Cadillac Seville is running for about 30 mins and then my oil pressure lights comes on and says "stop engine". I've checked the oil and it's ok.

From what you've described, the problem sounds like you are loosing oil pressure to the engine and the light and noise are indicating that there is a problem. The fact that you are full of oil tells me that the...

Q: Car won't start, needs alternator.

Hi there, I am not sure why all those components were replaced, but we can at least rule them out. A car basically uses the battery during start up. It provides power to the starter. Once the car is running...

Q: Factory radiator defect caused transmission fluid to contaminate transmission

Hello! I would suggest to using a radiator that has an abundance of good reviews from other customers. If the radiator is in fact causing the issues you've described there should definitely be other people who have already voiced their...