Car Problem Reports

Chevrolet Impala Engine Starts and Stalls Due to Secutiry System Fault

Chevrolet Impala Problem
39 Reports
Me Too

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

Engines Affected: 3.4L V6, 3.8L V6

Average Mileage: 102,037 mi (25,000 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.

  • lil james, , 3.8L V6, 150,000 mi

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

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  • Visitor, , 3.4L V6, 131,321 mi

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

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  • Visitor, , 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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  • Visitor, , 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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  • Visitor, , 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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  • Visitor, , 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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  • Visitor, , 3.4L V6, 109,000 mi

    Car wont start, secutiry light flashing.

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  • Visitor, , 3.8L V6, 25,000 mi

    Not fixed....engine security light comes on, then car wont start and we wait 20 minutes until it starts again

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  • Visitor, , 3.4L V6, 80,000 mi

    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.

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  • Visitor, , 3.8L V6

    Car will not start and security light is on. Wait about 20 minutes then car with start. Keeping happening on and off. Then finally I have to buy new battery like every 6 months. Haven't repair yet, trying to find out myself if anyone solved this problem.

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