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: Truck stuck in reverse

Hello. This is a known concern and GM has issued TSB 01-07-30-002E. It lists the symptoms you are experiencing and has a list of some testing to be performed leading to a wiring concern or a faulty ignition switch. You...

Q: Heat blowing on driver side but not passenger

The most common cause is the temperature blend door actuator for the passenger side is bad and needs replaced.

Q: Exhaust manifold bright red when car is on

Hi there. An exhaust manifold that reaches high temperatures is a sign of a blockage in your exhaust system. This blockage stops excess emissions to be burned off. The excess fuel and carbon will build up causing your manifold to...

Related articles

How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...
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.