Chevrolet
Impala
94

Engine Starts and Stalls Due to Secutiry System Fault on Chevrolet Impala

Problem Description and Possible Solution

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.

Problem Data
RepairPal Verified
Average mileage: 123,392 (10,210–253,456)
Engines affected: 3.4L V6, 3.8L V6
6 model years affected: 2000, 2001, 2002, 2003, more2004, 2005
94 people reported this problem
Comments
Viewing 1 - 20 of 43 comments
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.
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.
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?????
Car wont start, secutiry light flashing.
Security light on cant start car electronic systems in car will not work is there a recall and repair plan for this ?
My key comes out of the ignition in the on position. And stalls is that a faulty ignition cylinder?
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.
car wont start due to no fire to the crank sensor and fuel pump
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
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
the secutiry light comes on killing the engine, have to wait ten minutes for car to start
its not fixed yet but this information is just what I needed. thanks repairpal
Security lite will flash, and the is no power to engine. All dash lights come on but wont start. It usally will turn over after 15 min or so but it happens continually. It needs to be a recall on the passlock
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
Pass lock fail. Security message warning light. Engine will not start.
Engine starts and stalls ignition switch key is hard too turn when put in to start.
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.
security light com on and i have to wait at least 15 to 20 minute twice a week
Security light comes on,and my car won't start for 10-15min.had it fixed once at the dealership cost me $500 dollars. After about 2 yrs of it working OK it started it again. Why isn't it a recall on it.
sooo irritating when it does this!!!