The engine may start and stall with the security light flashing. This is commonly caused by a failed passlock sensor which is part of the ignition lock cylinder. A secondary cause could be the ignition switch itself. Worn contacts inside the ignition switch can cause voltage drop issues which can affect the passlock system. Proper diagnoses should be performed before replacing any parts.
Engine Starts and Stalls Due to Secutiry System Fault on Chevrolet Impala
Average mileage: 117,403 (9,700–236,772)
Engines affected: 3.4L V6, 3.8L V6
71 people reported this problem
35 people shared problem details
2000 Chevrolet Impala- 3.8L V6Visitor
my Impala also has this problem, the "Security" light comes on, I cannot start it. I have to wait 10-15 min. then it will start....havent found a solution.
2004 Chevrolet Impala- 3.8L V69,700Visitor
My car has been doing this not starting up thing for aymt two years i think that we should start a partition cause why should we not have to pay out of pocket its not our mistake its chevy.lets get this thing started who with me?????
2003 Chevrolet Impala- 3.8L V6150,000Visitor
The vehicle will randomly shut off while driving or would not start at times without me having to either take key out and wait 5-10 minutes or disconnecting (-)battery cable for a few seconds to reset. The stalling of the engine while driving would occur every time the "SECURITY" light came on and made some clicking noise. I've read several posts in forums with people having the same problem with no solution from Chevy. I think it's unfair they have such a major issue but no recall, instead stick loyal customers with pricey repairs bills to "try" and find the problem.
2005 Chevrolet Impala- 3.4L V6109,000Visitor
Car wont start, secutiry light flashing.
2005 Chevrolet Impala- 3.8L V698,000Visitor
My key comes out of the ignition in the on position. And stalls is that a faulty ignition cylinder?
2005 Chevrolet Impala- 3.4L V6131,321Visitor
its not fixed yet but this information is just what I needed. thanks repairpal
car wont start due to no fire to the crank sensor and fuel pump
2001 Chevrolet Impala95,123Visitor
Security light on cant start car electronic systems in car will not work is there a recall and repair plan for this ?
2003 Chevrolet Impala- 3.4L V688,352Visitor
NOT STARTING and SECURITY LIGHT is problem--no problem with engine stalling every month or so--SECURITY LIGHT comes on and stayed on for few minutes 6 months ago, 3 months ago when key turned to start car--no sound--not start all electrical devices work wait---then start after 3 to 15 minutes--engine has NEVER stalled then last week, not start, rotate through messages 3 minutes, 15 minutes later--still not start half hour later, car started, but CHECK ENGINE LIGHT came on and stayed continuously each time engine was started Mechanic charged retail to replace ignition lock cylinder $ 225.90, almost that much to remove and replace, plus diagnostic fee, and recoding and reprogramming fee
2004 Chevrolet Impala- 3.4L V698,000Visitor
the secutiry light comes on killing the engine, have to wait ten minutes for car to start
2004 Chevrolet Impala- 3.4L V680,000Visitor
at times it will not start I have to wait at least 10 minutes and then it will start. Its pretty good car except for the electrical issues its had. first it was the dimmer switch and now this.
2001 Chevrolet Impala- 3.8L V6140,000Visitor
I have had this same issue. No start with the security light. I found a guy who had a trick that has worked every time. First thing you do is turn the key into the on position, and wait 10 minutes. Then turn the key off and back to the on position 3 times in a row. Apply your foot to the brake and put your shifter all the way down and back up 2 times. Put your car back in park and the car will start up every time. My mechanic says its an ignition issue.
2005 Chevrolet Impala- 3.8L V6158,100Visitor
Pass lock fail. Security message warning light. Engine will not start.
2003 Chevrolet Impala- 3.8L V6122,100Visitor
Engine starts and stalls ignition switch key is hard too turn when put in to start.
2004 Chevrolet Impala- 3.4L V6Visitor
I turn the key and everything comes on like the lights and everything but the car won't start the engine makes this silent sound when I try to start it. I did this for a while and it took about 30 minutes before it started up eventually it wouldn't at all
2004 Chevrolet Impala- 3.8L V6115,000Visitor
car will not start security light blinks 3 times and car is dead 20 minutes later it will start happens random about once every 4 days
2005 Chevrolet Impala- 3.4L V6144,000Visitor
As soon as the security light is on n i put the car on park n turn off the engine it won't start at all it makes is a click sound before it would turn on after 10-20 min but now it don't even turn on at all
2000 Chevrolet Impala- 3.8L V6158,000Visitor
The security light flashes, then it just dies, won't start untill fuse is reset, who wants to keep doing that. Pls help!!!
2004 Chevrolet ImpalaVisitor
At first my Security light would come on and within about 3 days the car would not start. Would have to wait 15-20 minutes and it would start. This happened about 3-4 times the first year we had the car (bought used in 2013) Now the Security light comes on and anywhere from 3 days to a week later the car wont start... have to leave it sit over night and most of the next day before it will start. Cant plan on driving it any where for fear it wont start. Dont drive out of town might not get home. I drove it 3 blocks away from home today, shut it off, went back out to leave and the car wouldnt start so had to call my husband to come get my son and I. Tried talking to someone on the GM website and he couldn't give me an answer as to why there hasn't been a recall on the ignition switch. Lot of help he was. Will NEVER buy a Chevy again. Cant wait til this POC is paid off to get a car I can rely on. I checked the recall list to see if my car was on there and no it isn't. I am not going to pay for something that GM should be recalling. Am calling tomorrow to have a conversation with GM about this.
2000 Chevrolet Impala- 3.4L V6150,000Visitor
same problem with the ignition switch. Car runs then stalls when turn flashers are on.
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