Why is my car not turning off?

Asked by GuruR4H7L Apr 06, 2021 at 03:08 PM about the 2003 Chevrolet Impala

Question type: Maintenance & Repair

My 2003 Chevy Impala is continuing to run
when the battery is disconnected does this
have something to do with my alternator or
what could be going on with my car why does
it continue to run.

2 Answers


Do NOT disconnect the battery with the engine running!! This is a very old school way to test the alternator. If the engine continues to run the alternator is good. But with a newer vehicle you run the risk of frying the computers and other electronics!! Sounds like you got lucky this time. But please don't do that again!! Hope that helps! Jim


Did you turn the key off? If it still runs with key off, a gasoline engine can't run w/o spark unless it's dieseling. The pink wire at ignition module is primary voltage, goes hot with key on, if voltage there with key off, maybe something wrong with ignition switch? Just a thought. You need to do some testing.

1 people found this helpful.

Your Answer:

Own this car?

Share your experience with others.

2003 Chevrolet Impala

Review another car

CarGurus Experts

  • #1
  • #2
    james sparrow
  • #3
View All

Know more, shop wisely


Related Models For Sale

Used Chevrolet Malibu
1,171 Great Deals out of 19,400 listings starting at $1,454
Used Honda Accord
1,553 Great Deals out of 29,608 listings starting at $995
Used Chevrolet Silverado 1500
4,703 Great Deals out of 126,591 listings starting at $2,490
Used Toyota Camry
2,058 Great Deals out of 38,011 listings starting at $1,499
Used Chevrolet Camaro
826 Great Deals out of 14,829 listings starting at $4,999
Used Chevrolet Tahoe
1,456 Great Deals out of 20,745 listings starting at $3,499
Used Ford Mustang
1,298 Great Deals out of 24,812 listings starting at $1,995
Used Chevrolet Monte Carlo
5 Great Deals out of 247 listings starting at $4,995
Used Ford Taurus
196 Great Deals out of 2,534 listings starting at $900

Used Cars for Sale

2020 Chevrolet Impala For Sale
16 Great Deals out of 186 listings starting at $10,221
2019 Chevrolet Impala For Sale
58 Great Deals out of 690 listings starting at $11,595
2018 Chevrolet Impala For Sale
36 Great Deals out of 393 listings starting at $5,050
2017 Chevrolet Impala For Sale
41 Great Deals out of 410 listings starting at $6,859
2016 Chevrolet Impala For Sale
28 Great Deals out of 252 listings starting at $5,990

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use. Content will be removed if CarGurus becomes aware that it violates our policies.