Q: Security system on my new to me car has been toggled on.

asked by on

I bought the vehicle from a tow yard and I've been making small repairs to it since. A few days ago the security light came on and the key would not start the engine. After doing research and figuring out that it might have something to do with the passlock 2 system I replace the ignition cylinder and have a new copy of a key made with the correct resistance. I have tried the 10-minute relearning procedure as well as the 30-minute relearning procedure. The security light is now off but will not start the engine. There is a slight grinding sound from inside the dash. I have no idea what else to try and could use some advice.

My car has 172571 miles.
My car has an automatic transmission.

Hi there. Try taking the key and putting it in the driver door and unlocking and locking the door 3 times. This will make the computer acknowledge the key and finalize the programming. For the dash sound, that could be the heater fan motor making the noise as you are attempting to start the vehicle. If you need further assistance with the security system to your vehicle, then seek out a professional, such as one from Your Mechanic, to help you.

Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  1. Home
  2. Questions
  3. Security system on my new to me car has been toggled on.

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: Q: Ignition not turning.

This is a common problem with the Ford Focus. Most likely, the ignition cylinder is bad and requires replacement. A certified technician, like one from YourMechanic, will be able to repair this for you.

Q: Blown head gasket ? 2000 Buick Regal

Hi there - you may be in luck on this one. This GM engine is one of a number of late model V6 engines that develop intake manifold leaks of coolant into the oil pan. Symptoms look quite similar to...

Q: check engine light is on. p0401 and p0125. car works with no problem. temp is on midline.

Hi Behrooz. Thanks for writing in today. Here is some information about these two error codes you've listed. I would recommend clicking the links to the articles that discuss the codes, sources and possible solutions. P0401 is an OBD-II generic...

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
How Much Does a Mechanic Make in Vermont?
Automotive technician jobs in Vermont have an average mechanic salary of $37k, with some mechanics earning a salary of $53k.
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.