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 Since the key is no longer valid, it is likely that you will not be able to restart the engine once you have shut it off.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

The Traveler’s Guide to Driving in Malaysia
CraigBurrows / Shutterstock.com Malaysia is a popular destination for many tourists today. The country has amazing sights and attractions that you will want to explore....
Veteran and Military Driver Laws and Benefits in New Mexico
The state of New Mexico offers a number of benefits and perks for those Americans who have either served in an Armed Forces branch...
P2159 OBD-II Trouble Code: Vehicle Speed Sensor B Range/Performance
Diagnostic Trouble Code (DTC): P2159 P2159 code definition Vehicle Speed Sensor B Range/Performance...

Related questions

Q: Warning message coming up on display panel.

When this warning comes up it is typically caused by a bad parking brake switch. The switch either fails or the connection comes loose. A mechanic would check this out by seeing if the brake light is coming on inside...

Q: how can i bypass my sanji alarm it cuts my engine out completely if i put my ignition on and press the alarm button nothin goes on

When these aftermarket alarm systems start to not work there is no way to fix it. Unfortunately you will have to replace the entire system or remove it and convert back to the original wiring connection. Doing either of these...

Q: I have a 2007 mdx and the check emission system light came on while I'm driving but not all the time. What can cause that issue?

For the transmission, check the fluid to see if it's low. If the fluid is low, then it will need to be topped off. If the fluid is full and is red in color, then there could be an issue...