Anti Theft Light on While Driving: Why? - It is My Car

The majority succeed in doing just that. However, when anti theft systems malfunction, they also bring about a lot of annoying issues. Possibly, your car won’t start. Or, while you are driving, the system might suddenly turn off the ignition, causing your car to stall. If you use the key to open the door, the alarm might also sound instead of turning off. Alternately, the alarm would sound for no apparent reason.

So, when the anti theft light on while driving, it is something which needs some attention from you. You must find out why the anti theft light keeps turning on and how to fix it. In this article we discuss this problem in depth. So welcome to itismycar.

What is an anti theft system in a car?

Unauthorized entry to a motorcycle or car is prevented by the use of an anti-theft alarm system or car alarm. Because of this, the makers added a security feature to keep someone else from using the product. They install various devices in cars to make this easier.

The sensors are activated by an impact or movements inside the vehicle. In turn, it sets off the alarm, which then sounds. The alarm finally sounds, alerting the owner or people. Even a slight shift in the position of the vehicle can cause the tilt sensor to alert and trigger the anti-theft alarm system.

It is very important to have an anti theft system installed in your vehicle if you love your vehicle and wish it a long life with you.

What triggers the anti theft system in cars?

If the key fob battery dies and the anti-theft system hasn’t been disabled, the car’s anti-theft system may activate. Verify that the battery is properly installed in your key fob. Many automobiles have a valet door or key that is limited to opening doors.

Anti Theft Light on
Anti Theft Light on

How do I know if my car is in anti theft mode?

Most contemporary vehicles have a dash light that flashes when the anti-theft system is activated. The anti-theft system’s icon resembles both a car and a lock combination.

Symptoms of a bad anti theft system and Reasons for anti theft light on while driving.

There are many symptoms that indicate problems with a bad anti theft system. So some of those symptoms are as follows. So, when you see one or more of these symptoms, the cause can be a problem in the anti theft system.

Doors Won’t Unlock.

Your key fob is not in communication with the immobilizer system if you press the unlock button on your car key fob and the door does not unlock. Your key’s battery may need to be changed, or there may be a problem with the immobilizer system itself.

Doors won’t lock.

If your door cannot be opened with a key fob, you most likely won’t be able to lock it with a key either. This means that if your doors automatically lock after a certain amount of time, you’ll either need to leave them unlocked or leave the windows open.

Engine Won’t start.

If the appropriate security token is not provided to the immobilizer, it will typically prevent the engine from starting. Your car might occasionally lock and unlock with no change in the engine’s refusal to start.

Will anti theft light drain the battery?

Although the majority of factory-installed car alarm systems won’t cause the battery to discharge too quickly, this isn’t always the case with aftermarket alarms.

This is especially true for alarms that have an “on” setting for when the car is stopped and the ignition is off.

Will anti theft light drain the battery
Will anti theft light drain the battery

These systems have direct wiring from the battery to the alarm, which gradually drains the battery of power. This may eventually result in the battery failing.

So overall, yes, the anti theft system can drain the battery. You can check this when you bring it to a service center.

Anti theft light blinking car won’t start: Why?

Either the key itself or your anti-theft system (pass-lock) may be at fault. The keys contain a chip inside of them.

The alarm system checks the key for codes when it is in the ignition. If you have another key, use it. If it does, the first key needs to be replaced because it is damaged.

Take the key to the dealer to see if it actually transmits properly if it doesn’t start with the second key or if you don’t have one.

How do I disable anti theft on my car?

  1. Check the battery in your keychain in step one. If your key fob is dead, which means it cannot be “seen” by your car, it is fairly typical for the anti-theft system to activate.
  2. Remember that your key fob could simply have a poorly installed battery and not be dead.
  3. Check the door lock cylinder in step two. The anti-theft system may have been activated if your car was damaged, whether it was the result of an attempted break-in or theft or something else.
  4. Examine the lock cylinder for damage and look underneath the door handle because thieves have been known to try to jimmy doors open with screwdrivers.
  5. Verify that the key you are using to start your car is the correct one. Although it may seem absurd, many vehicles have a valet door or key that only serves to unlock a door.
  6. While valet keys can open your door, they lack a chip and cannot start your vehicle.

If your automobile has a keyless entry system or remote starter and won’t start (the anti-theft light is flashing), there may be a problem with the keyless entry fob itself (try using a backup fob if you have one), the receiver may not be receiving the signal, or the battery inside the fob may be dead.

The only way to remedy the latter is to have the dealer check to verify if the module is receiving and accurately processing signals. If not, they will need to replace the anti-theft module or keyless entry receiver.

How much does it cost to fix the anti theft system?

Replacement of the control module for an anti-theft system typically costs between $411 and $438. The cost of labor is estimated to be between $104 and $132, while the cost of the parts is $306.

Taxes and other fees are not included in this range, nor are your particular vehicle or geographic location taken into account.

We hope you’ve got the answer that you’ve needed for the question, “Anti Theft Light on While Driving” reading our explanation. If you have more questions just leave a comment below, and we are really straightforward to help you further. If you need review of the How to Start My Car without Chip Key, check this link for it. Thank you.

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