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.

Battery could be the source of the problem. (Photo
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.

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.

Move the wheel and keep trying the key. (Photo Sou
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.

Volkswagen Security System Reset

To deactivate the anti-theft system use the unlock button on the remote key. Unlock the driver’s door using the key and then switch the ignition switch to the on position. If that doesn’t work exit the vehicle and roll up all windows, then use the key to lock the driver’s door. Wait for fifteen minutes and unlock the drivers door using the key, start the engine within 15 seconds of opening the door.

To see alarm system questions and answers please visit our forum.

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Cadillac Chevy GMC and Other GM Security Reset

Call to the dealer, this was their response: Exit the vehicle and unlock the car using the key fob. Insert the key into the outside door handle and turn it right and then left to lock and unlock. This can be done to either the driver’s or passenger door. Insert the ignition key and crank the engine over. Hold the panic button down to disable the alarm. Push unlock button and try starting it. If that doesn’t work disconnect the car battery by removing the negative cable end. The pass lock sensor that controls the security system is built into the key tumbler or tumbler case which reads a chip inside the key. This chip is generally unseen.

On older GM cars two small wires will break near the tumbler which will activate the system. In this case the tumbler must be repaired or replaced.

Method 3 of 3: Use the key in your car door

Step 1: Insert your key in the lock on the door. Use the driver’s side door and the physical key even if your vehicle is equipped with a keyless entry system.

Step 2: Turn the key. Turn the key to unlock your

Step 2: Turn the key. Turn the key to unlock your car door, but don’t release it.

Hold the key in this position for 20 to 30 seconds. This lets the system know you have the correct key, and it can allow you to bypass the alarm system. Some vehicles recognize the key simply by turning the key back and forth in the door lock key cylinder.

  • Tip: Try turning the key both ways fully to disable the anti-theft system.

Step 3: Try to start the engine. Remove the key and try to start the engine.

Be sure to leave the key cylinder in the unlocked position.

An anti-theft system that prevents your car from running properly is a nuisance, and while you may be thankful for it in the event of a crime, it is now causing you a great deal of inconvenience, which these steps have hopefully helped you resolve. If your car still won’t start, you should consult with a professional from YourMechanic to determine if there is another issue that is preventing your car from starting.

How Do I Disable My Transponder Key?

  • Your key needs to be inserted into the ignition in order to start your car.
  • The key to “On” should be pressed, then left there for 10 minutes and 30 seconds, then turned off.
  • After the third cycle, repeat the previous step two more times, ending in the “Off” position.
  • Disconnect the Battery

    Disconnect the Battery
    Disconnect the Battery

    One last thing you can try if your car alarm is going off and you can’t get it to stop, but you can get under the hood is to disconnect the battery. By unplugging the battery for a few minutes, it will also reset the computer. All you have to do is disconnect the positive or negative terminal and wait. After waiting a few minutes, you can reconnect it and see if that has solved your problem.

    Can Thieves Bypass Engine Immobilizer?

    Using a little technology, thieves can disarm the immobiliser in half an hour, removing one of the most important security barriers that keep them from stealing your vehicle by listening in on the signals between your car and the locking system.

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    Check key and cylinder

    Sometimes your alarm will start to go off if the battery in your key fob is getting low. This is to warn you that it is getting low so you don’t have to deal with being locked out of your car or having to use the key to get in the car. If the alarm starts going off randomly, then the first thing you should do is switch the battery in your remote. You will then have to wait a few days and see if that fixes the problem. If it does, then you are good to go, but if it doesn’t, then you will have to investigate farther.

    The next thing you should check is making sure that the door lock cylinder isn’t damaged. The door lock cylinder is on the inside of the door where it latches to the body of the car. If it looks damaged or seems like that it isn’t making a good latch, then that might be the cause of the alarm going off. This is because the car might think someone is trying to pry the door open. Also, you should check under the door handle where someone would try to punch a screwdriver thru to open the locked door. If this area is damaged, then it could be triggering the alarm. If the door lock cylinder looks damaged, then try replacing it and seeing if that fixes the issue.

    The last thing you need to check is back to the key, and that is making sure you are using the right one. Some cars have valet keys that are only designed to do certain things, and if you are using the wrong key, then it can set the car off. This is because the car will think you are trying to use a fake key. Also, some cars have chips in one key but not another, so make sure you are using the one with the chip. When you get in a hurry, it is easier than you might think to try to use the wrong key and that will trigger our anti-theft system.

    Quick Solutions to a False Alarm

    Fortunately, if you experience a false alarm or you can’t start your truck, you have several options for resetting the system. The first and easiest thing to try is pressing the alarm button on your key fob which should deactivate the alarm and reset the system. If that doesn’t work, the anti-theft system could have been triggered for a different reason.

    The next thing you should check is the door lock cylinder to make sure it isn’t damaged. The cylinder is on the inside of the door where it latches to the body of the car. If it looks damaged or isn’t latching properly, then that could be the cause of the alarm being triggered because the anti-theft system might think someone is trying to pry the door open. 

    Additionally, check under the door handle where someone might try to force a screwdriver through to open the locked door. If this area is damaged, it could be causing the alarm to go off. If the door lock cylinder or door handle looks damaged, contact your Ford dealer to have them replaced.

    Check that you are using the right key. It might sound obvious, but when you’re in a hurry, it’s easier than you might think to pick up the wrong key and that will trigger your truck’s anti-theft system. This is because the vehicle will think you are trying to use a fake key.

    Summary

    While electronic immobilizer anti-theft systems ca

    While electronic immobilizer anti-theft systems can give you a few headaches here and there – it’s well worth it -considering the number of car thefts that they prevent every year. 

    In fact, car theft has become so tricky without akey in recent years that it’s almost exclusively done by professionals. Carjackers are a thing of the past – and the professionals need a ton of training. 

    You might be swearing off the system while your car won’t start – but once everything is back to working how it should, you’ll be glad that you have it!

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