I have a X 2003 police car..I am having the problem where sometimes my security lights turns on and the car won't start. This normally happens when the car is around 1/4 full. I have tried everything but the only way that seems to work is wait for a while with the key in the ignition for a while. I am wondering if anyone has heard of this problem and knows how to fix it. I think it happens on reg impalas also.
I'd venture a guess towards the Pass-Lock sensor in the ignition lock cylinder. I would suggest you seek a professional, such as a GM dealer...or a repair shop that has a GM compatible scan tool. Check for stored security codes then, I'm not a betting man, however I'd lean towards a failure of the sensor...which means lock cylider replacement. If you have replaced such...seek professional assistance.
i have this problem happen to my 2001 impala. They installed a new ignition switch and cut new keys. I heard if this happens to you and you get stuck you should leave the keys in the ignition with the key turned just before the start position for 15 minutes and the car should start. A fault in the ignition makes the computer think the car is being stolen, therefore it prevents the car from starting.
The fix is replacing the pass lock sensor which comes complete with the ignition cylinder. There is a bypass that I have heard of but not sure where you would take it to get it done!
There are a couple different ways to by pass this system. One is to buy and install a tdm bypass module.
The other is to put a resistor jumping the two wires that lead to the ignition cylinder, make sure the resistor its the same resistance as the chip in the key. Also ensure that when the wires are jumped they are no longer in contact with the ignition cylinder.
This assumes you have a key with a chip in it.... If not you need a bypass module.
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If anyone needs Impala specific help visit ImpalaForums.com we'll be glad to help anyone out, though most problems, questions, and mod suggestions have already been discussed thoroughly.
-donmateo
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