We’ve all been there: You’re driving down the street, minding your own business, and all of a sudden your car just comes to a screeching halt. What could have caused this? The most likely culprit is a faulty ignition switch. This simple component can cause all sorts of car problems, from driving in neutral to not starting at all. If you think your car might be affected by a faulty ignition switch, don’t hesitate to take it to a mechanic for an evaluation. They may be able to replace the switch without too much hassle.
What is an Ignition Switch?
An ignition switch is the component of a car that controls the power to the engine. When you turn the key to the on position, the switch sends a signal to the engine control module (ECM) telling it to start. If there is an issue with the switch, for example if it’s broken, then the ECM won’t be able to send this signal and the car will not start. This can cause problems with things like temperature gauges, lights, and even the ability to shift gears.
How Does an Ignition Switch Work?
An ignition switch is a component on an engine that controls the firing of the spark plugs. When the key is turned to the “on” position, the switch fully engages the coil, and current flows through it to create a spark. This sparks plugs in turn start the engine’s pistons moving. If there is an issue with one or more of these parts (a bad coil, for example), then this will prevent the key from turning all the way to “on” and will disable the engine. A car in limp mode will not move no matter how much you push on the gas pedal – essentially it’s frozen in place.
When Should You Worry About an Ignition Switch?
In the event of a failed ignition switch, your car may not start. This can be a serious safety concern, as limp mode can make it difficult to drive and can even lead to a crash. If you experience difficulty starting your car, or if it won’t start at all, don’t hesitate to take it to a mechanic for inspection.
How to Test If Your Ignition Switch Is Working
If your car does not start, the first thing to check is the ignition switch. A faulty switch can cause your car to not start. To test if your ignition switch is working, you’ll need a light bulb and an ohmmeter. Turn the key to the “on” position and hold it there while you connect the light bulb in series with the battery terminal. You should see a voltage reading on your meter when you do this. If the reading is less than 12 volts, then your ignition switch may be malfunctioning and needs to be replaced. If the reading is greater than 12 volts, then your ignition switch is okay and does not need to be replaced.
Fixing an Ignition Switch
If your car’s ignition switch is not working, it may be causing the car to stay in “limp mode.” In this mode, the car won’t start. There are a few things you can do to fix an ignition switch and get your car back into gear.
Check the continuity of the switch’s wires. If there is no continuity, the switch may need to be replaced.
Test the battery with a charged battery tester. If the battery is good, then the problem may be with the ignition switch.
If all else fails, replace the ignition switch.
Conclusion
In a situation where you know your car has been in an accident and the battery is dead, can an ignition switch put the car into limp mode? This is a common question that drivers have, and it’s one that many mechanics are also unfamiliar with. Technically, yes — if the key is turned to the “off” position and the car is not started within five minutes, the engine will shut off due to a safety feature called anti-theft protection. This will prevent someone from stealing your car if they find it idling in the parking lot. However, since this shutdown happens without any warning or indication from the vehicle itself, it can be confusing for drivers who aren’t familiar with what’s happening. If you have any further questions about how an ignition switch can put a car into limp mode, please feel free to reach out to your mechanic for more information.