Car Problem Reports

Chevrolet Impala Engine Starts and Stalls Due to Secutiry System Fault

Chevrolet Impala Problem
52 Reports
Me Too

Model Years Affected: 2000, 2001, 2002, 2003, 2004, 2005

Engines Affected: 3.4L V6, 3.8L V6

Average Mileage: 108,520 mi (9,700 mi - 236,772 mi)


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.

  • , , 3.8L V6

    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.

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  • , , 3.8L V6, 9,700 mi

    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?????

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  • , , 3.4L V6, 131,321 mi

    its not fixed yet but this information is just what I needed. thanks repairpal

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  • , , 3.8L V6, 150,000 mi

    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.

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  • , , 3.4L V6, 88,352 mi

    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

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  • , , 3.8L V6, 150,000 mi

    car wont start due to no fire to the crank sensor and fuel pump

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  • , , 3.4L V6, 109,000 mi

    Car wont start, secutiry light flashing.

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  • , , 3.8L V6, 98,000 mi

    My key comes out of the ignition in the on position. And stalls is that a faulty ignition cylinder?

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  • , , 95,123 mi

    Security light on cant start car electronic systems in car will not work is there a recall and repair plan for this ?

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  • , , 3.4L V6, 98,000 mi

    the secutiry light comes on killing the engine, have to wait ten minutes for car to start

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