Anti theft preventing my car from starting

Tiny
DEBBIE BLAKELY
  • MEMBER
  • 2003 SATURN L200
  • 2.2L
  • 4 CYL
  • 2WD
  • AUTOMATIC
  • 160,000 MILES
I have done about everything to get my car to restart. I have disconnected battery cables, turn the key back and forth in run position. Nothing works. I have had to wait hours at times for it to start. I am stumped.
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Saturday, May 26th, 2018 AT 11:09 PM

7 Replies

Tiny
HEYMAN1104
  • EXPERT
Take the key to the dealership and have it tested. It is possible that there is a problem with the chip in the key head and it is causing your issues. If so, all you need is a new key. Try that and let us know what you find.
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Sunday, May 27th, 2018 AT 4:56 AM
Tiny
DEBBIE BLAKELY
  • MEMBER
I will take the key to the dealership and keep you posted. Thank you
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Monday, May 28th, 2018 AT 7:34 AM
Tiny
STEVE W.
  • EXPERT
When you put the key in the ignition and turn it to start and run, what does the security light do? It can give you an idea if it is the security system by what it does.
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Tuesday, May 29th, 2018 AT 9:33 AM
Tiny
DEBBIE BLAKELY
  • MEMBER
The icon with the car and padlock blinks.
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Tuesday, May 29th, 2018 AT 11:01 AM
Tiny
STEVE W.
  • EXPERT
That would mean the system is not recognizing the key you have. However, you say that it sometimes does start? Does the light stop flashing then or does it go on solid?
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Tuesday, May 29th, 2018 AT 12:42 PM
Tiny
DEBBIE BLAKELY
  • MEMBER
When the light stops blinking the car starts. But if the ignition is not recognizing the key how is it recognizing it other times?
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Tuesday, May 29th, 2018 AT 3:02 PM
Tiny
STEVE W.
  • EXPERT
It is not the key itself that is the problem. It sounds like the pass-lock sensor or its wiring has a problem. What do you have on the key ring along with the key? Anything?

Your car has the early pass-lock system, there is a magnet that turns with the ignition cylinder, this passes a sensor inside the ignition switch housing. That is the part that triggers the alarm on/off. If it does not get the signal for more than five seconds the light flashes and the car will not start. This is a sort of common issue. The repair is usually a replacement sensor inside the ignition switch assembly.

Unfortunately the only real way to tell if it is a failed sensor requires a scan tool that can watch the security system as it responds when the key is moved. Either a good shop or a dealer would have those. Then once the sensor or the wiring is replaced there is a ten minute relearn process using the same scan tool.
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Tuesday, May 29th, 2018 AT 4:44 PM

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