ANTI-THEFT SYSTEM light always on while driving on 2003 Chevy Malibu. Car always starts and runs great. How do I turn off the light?

Asked by Feb 25, 2017 at 10:00 PM about the 2003 Chevrolet Malibu Base

Question type: Maintenance & Repair

I bought this car used last year and I decided to install a ProStart remote start that I got from a friend brand new. I got everything hooked up properly. I knew that I would need to bypass the Passlock II system but I tried it anyway because I thought maybe the previous owner might have already bypassed it because there was an aftermarket immobilizer installed. When I tried to start the car, it didn't work (obviously it wasn't bypassed previously). I tried to start the car with the key after and ended up having to wait 10 minutes before I could start it.
I drove away to go for lunch and as I was driving, the ANTI-THEFT SYSTEM light went on. When I got home, just out of curiosity, I tried to remote start it again and it worked! It's like the Passlock II disabled on it's own. Its not affecting the way the car starts and it drives fine, but the theft light is always on now and its bothering me.
If the passlock system was disabled, it's supposed to reset and require the key to be relearned when the battery is disconnected but it does nothing. I can unplug the battery for half an hour and when I plug it back in the car starts perfectly without relearning the key, except the anti theft light is still on.

2 Answers

26,555

The anti-theft is likely in "fault" mode, meaning it won't immobilize the car but does think there is a problem with the system

1 of 1 people found this helpful.

Shoudn't it reset when the battery is disconnected? I read that it's supposed to but even if I disconnect the battery it starts fine with the light still on. I just want the light to go away. The wiring is all good as well

Your Answer

Chevrolet Malibu Experts

  • #1
    tenspeed
    Reputation
    2,110
  • #2
    T_S_T
    Reputation
    2,030
  • #3
    Tom Demyan
    Reputation
    1,500
View All

Related Models For Sale

Used Chevrolet Impala
507 Great Deals out of 33,699 listings starting at $950
Used Honda Accord
1,066 Great Deals out of 60,933 listings starting at $999
Used Toyota Camry
1,051 Great Deals out of 70,370 listings starting at $295
Used Nissan Altima
1,030 Great Deals out of 74,828 listings starting at $1,200
Used Hyundai Sonata
708 Great Deals out of 49,616 listings starting at $790
Used Kia Optima
461 Great Deals out of 29,112 listings starting at $2,450
Used Honda Civic
817 Great Deals out of 72,402 listings starting at $1,000
Used Chevrolet Camaro
405 Great Deals out of 30,567 listings starting at $3,550
Used Nissan Maxima
280 Great Deals out of 23,044 listings starting at $899

Used Cars For Sale

2017 Chevrolet Malibu For Sale
347 Great Deals out of 27,276 listings starting at $12,991
2016 Chevrolet Malibu For Sale
133 Great Deals out of 6,141 listings starting at $9,900
2015 Chevrolet Malibu For Sale
204 Great Deals out of 5,567 listings starting at $7,900
2014 Chevrolet Malibu For Sale
114 Great Deals out of 3,804 listings starting at $6,991
2013 Chevrolet Malibu For Sale
57 Great Deals out of 2,498 listings starting at $6,399

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.