Q: Tried to reset key fob didn't work now immobiliser activated.

asked by on

Everything was fine before this now car won't start

My car has 98000 miles.
My car has a manual transmission.

The Immobilizer System indicator light comes on for a few seconds, then it goes out when you turn the ignition switch to the ’ON’ position. The Immobilizer System light will blink if it cannot recognize the key coding. Try reprogramming the key again, but keep the key away from any metal objects, including other keys. The metal objects will interfere with the programming sequence. Then when you are done with the programming, before starting the vehicle, take the key and put it into the driver door lock and unlock and lock the door 3 times with the key and the fob at the same time. If you need further assistance with your key fob not programming correctly and the Immobilizer system is active, then seek out a professional, such as one from Your Mechanic, to help you.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1,000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!
  1. Home
  2. Questions
  3. Tried to reset key fob didn't work now immobiliser activated.

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: Car won't start in the morning, but it starts perfectly throughout the day. 2005 Ford Focus

It sounds like your engine does not have fuel pressure held up to the injectors overnight. The fuel pressure is leaking down due to a bad fuel pump check valve, or the fuel pressure regulator is leaking down the pressure....

Q: My steering wheel and my seat used to adjust automatically when I started my car and has stopped working all of a sudden 2005 Mercedes CLK500

Hi there - the memory functions which keep track of seat and steering column positions are tied to each key fob. If you accidentally switched key fobs, the different key fob may not have had the same memory settings. The...

Q: Just replaced my fuel pump but its not getting any power tested fuel pump relay and fuel fuse both good tested the wires all good.

You need to look at the theft light on dash to make sure it comes on and goes off when you turn the key to the on position. If light comes on and stays on then your theft system is...

Related articles

How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...