Clever Tricks to Solve When the Anti Theft System Car Wont Start

The anti-theft system is designed to protect your car from theft and vandalism. Its mechanism involves an electrical circuit that disconnects in the event of a suspicious activity. It interrupts the power supply in a fashion that your car won’t start or even die anytime soon. Sometimes, the system can be triggered without any threat and immobilize the engine. What should you do when facing the problem of anti theft system car wont start?

Anti Theft System Car Wont Start: What to Do?

What should I do when the anti theft system wont let my car start? It is possible that the system can trigger the car alarm or prevent the engine from running without any apparent reason. You have to shut it off if it is not working properly. The car won’t return to normal operation unless you fix the issue of anti theft device car wont start.

How to disengage anti-theft system? These tricks will help:

Check the battery.

The first thing you should take a look into when the anti theft system car wont start is the car battery. It could be dead or low and needs charging. In that case, the car’s system won’t be able to read the security code off the key fob. Check the battery connections. If they turn out alright, try to jumpstart it. It is likely to solve the problem.

anti theft system wont let my car start
Battery could be the source of the problem. (Photo Source: western61)

When you are inside the car.

Apply this trick when you have access to the car’s interior and the ‘Theft System’ light on the dashboard is ON. Insert the key in the ignition slot and turn it to the right only slightly. Keep it in that position for 10 minutes or a little more. It is likely to turn off the light and start the car.

Remember that this is the state where the vehicle is on but the engine is off. All the necessary components like the radio and dashboard lights will be powered up, which makes it possible to bypass the theft alarm.

When you are outside the car.

Use your car key in the slot on the driver’s side door and hold it for a few seconds after turning it to unlock the door. This trick works sometimes and helps going past the factory alarm. It allows the car’s system to detect that you have the original key. It works mostly in models of Volkswagen, Mercedes-Benz, and BMW and is applicable even when the key fob is damaged or has a dead battery.

In case if you are driving a Honda Accord, the trick needs a bit of modification. After inserting the key into the driver’s door lock, turn the key to unlock, lock and then lock position again. Then, turn it again to the unlock position and the alarm is likely to be disabled now. Run the car for at least 10 minutes after cranking the engine to allow the car to reset the alarm.


Reset the car’s computer.

It is another way to solve the problem of anti theft system car wont start. Disconnect the positive terminal of the battery for a minute or two. Reconnect it and make sure that both the anode and cathode terminals are tightly attached. It will reset the computer system and your car is likely to kick off.

In case the trick fails, reset the factory alarm by activating its built-in kill switch.

Use the key trick with the steering wheel.

Sometimes, the anti-theft system locks the steering wheel and does not let the key turn inside the slot. This annoying problem is mostly exclusive to Hondas. It mainly happens when you move the steering wheel after turning off the car. It locks the wheel in that position and does not let you move it next time you try to switch on the car.

how to disengage anti-theft system
Move the wheel and keep trying the key. (Photo Source: scoop)

The wheel is likely to be locked in one direction. Try moving it to the opposite direction and it will budge. Try pulling the car in that direction. At the same time, insert the key into the ignition slot and attempt to turn it. If the key is stubborn, pull on the wheel harder as much as possible and keep trying with the key. At one point, you will be able to switch on the ignition and start the engine.

Check the key.

The key itself could be the culprit for the anti theft system car wont start. The keys have a built-in chip that sends a code to the alarm system when you insert it into the ignition. That chip won’t work in case of a broken or damaged key. If one key does not respond, try the other one. If nothing happens, take them to the dealer to scan of their transmission system is working.

Another trick you can try is to use the key to start the engine. If the engine does not respond or dies immediately after cranking up, leave the key in that position for 10 minutes. When the security light goes off, turn the ignition off, wait 20 seconds, and then start the engine.

These are the most popular ways to solve the problem of anti theft system car wont start. Most of the cars are likely to respond to at least one of these tricks.