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My 2002 chevy impala wont start. When i try to crank it all the lights shut off & nothing works but the check engine light flashes. After messing with the positive post on the battery the lights come back on but the samething happens. I tried starting it yesterday & it took a while but it finally started but later on after that its been doing what it been doing & only starting a few times. I still dont trust driving it like that even thought it started a few times. What could be my problem

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  • Cars & Trucks Master
  • 40,764 Answers

Dirty battery terminals
they are most likely a black color inside and on the posts where they should be a shiny clean
use a wire brush or file to remobe the lead sulphate that is preventing good contact and then make sure that the terminals are tight

Posted on May 21, 2017

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6ya6ya
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Posted on Jan 02, 2017

  • 71 Answers

SOURCE: car engine wont turn over

it sounds like either the key is going bad (chip inside) or the PAT's immobilizer system is not detecting a key is inserted with the correct code. If you remove the column surround you will see connectors just make sure all of these are secure, watch the yellow one do not disconnect it as its the airbag and theres a chance of it deploying.
Also try your spare ignition key if you have one.

If all is ok i'm afraid you may need to make a trip to ford for them to diagnose, the pat's system works well almost too well sometimes. i deal alot with them while installing remote starts and when they go wrong its almost always the dealer to resolve it. They have the computer software to test the system.
Sorry,

Posted on Nov 28, 2008

  • 398 Answers

SOURCE: 1987 F150 302 ci. EFI, Automatic,

try over riding the starter relay on the fender ,it has one there right?. dont go to a mechanic yet. the engine aint seized. if it doesnt have this relay then i would get the alternator tested. if you want to test it yourself it can be costly for the right equip. autozone usually tests for free. i dont know were you live so if theres not an autozone. let me know if you cant get it tested.

Posted on Mar 27, 2009

  • 6982 Answers

SOURCE: my 2003 chevy tahoe, died while i was driving

OK if only 4 months old, charge it with an external battery charger. Once vehicle is running the quick and still most valid test I make is:
Running, with no accessories on, charge volts on volt meter (not dash gauge) should read between 12.9 &14volts. Turn all accessories and headlights on high beam. Volts should not read below 12.5v at idle and should not creep lower after running at any time, even after ten or fifteen minutes. If voltaqge is not as specified alternator has failed and needs replacement.

Posted on Apr 22, 2009

  • 36 Answers

SOURCE: wont start security light stays on

Body Control Module (BCM) on both counts. Find a shop in your town that specializes in electrical systems to test it. Beware, these can be intermittent problems, so make sure they keep it until the car does what you have observed. Expect to spend about $450 for the replacment. Dealers quoted me between $700 and $1,100 for the same repair. By the way, a new BCM will probably only last you about 12 months.

Posted on Aug 14, 2009

longbow243
  • 103 Answers

SOURCE: Battery/Electrical issues with 2002 Chevy S10 pickup

Sounds to me like the battery post is breaking away from the internal plates. This is something that happens from time to time with a battery.

Posted on Sep 03, 2009

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2002 chev impala, will not start. fuel pump and gauge not working on dash. When i go to start all lights go out on dash and than they will come back on in 3 or 4 seconds?


Have the battery tested if no good replace. Check for power at the starter cable and then while someone holds the key in the crank position check for power at the trigger wire of the starter. If you have power but no crank or click then you may have a bid starter or the engine is seized. If no power on the tarter little wire which comes from the ignition switch make sure you fuses and relay is good and that your ignition switch is working. If the battery tests good have your alternator checked as well.

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Is the security light flashing ? Will it crank in neutral ?

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2002 chevy impala won't start if I jump starter


Is the security light on or flashing ?
The yellow wire goes from the key switch to the neutral safety switch, then to the starter. So bypassing the neutral safety would make the starter crank the engine, but would have nothing to do with the rest of the engine.

May 27, 2013 | Cars & Trucks

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I have an 2002 Chevy Impala, when I go to crank my car it won't do anything. I have to play with the ignition by turning the key back and forth in order for it to crank. what is that?


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It has nothing to do with the starting system

You said you have to play with the key & ignition switch
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I have a 2002 chevrolet impala and it does not want to start.the security light is on. is there something i can do to make it work again


usually if security light comes on means ur alarm system is being triggered. wrong key. or wont recognize the code from the ignition cylinder. try opening the ignition on for 10 seconds. turn it off and try crank the engine again.

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Replaced ignition switch 2003 chevy impala and car will not start


After you replace the ignition switch turn the key to start the car and release leave the key were it stops after trying to start wait 10 minutes until security light goes out turn key to full off position then repeat the above procedure two more times for a total of three on the 3rd attempt to start car wait for light to go out then turn key to full off positoion wait 10 seconds then try to start car body control module should learn new pass code and the car should start.
Big john, J@J Automotive

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My Chevy Impala 2000, wont start at all...and the engine light shows.I dont think its the battery because the radio and headlights still work...But when i put the key in and turn , the car wont even...


See if your security light is flashing if it is leave key in the on position untill light stops flashing then attempt to start you may have to repeat this two or three times

May 05, 2009 | 2000 Chevrolet Impala

1 Answer

2002 Chevy Impala


This sounds like a bad battery or a bad connection at the battery, the guages are the key, check the cables for a white power, this is battery acid corrosion and must be cleaned off, auto zone or kragen auto will test your battery for free.

Nov 05, 2008 | 2002 Chevrolet Impala

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