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 FWD

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

38,035

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

2 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
    T_S_T
    Reputation
    2,450
  • #2
    tenspeed
    Reputation
    2,300
  • #3
    crazymom56
    Reputation
    1,430
View All

Related Models For Sale

Used Chevrolet Impala
537 Great Deals out of 25,594 listings starting at $790
Used Honda Accord
719 Great Deals out of 96,716 listings starting at $1,225
Used Toyota Camry
1,012 Great Deals out of 70,645 listings starting at $1,137
Used Nissan Altima
912 Great Deals out of 54,141 listings starting at $1,300
Used Kia Optima
333 Great Deals out of 27,883 listings starting at $1,000
Used Hyundai Sonata
562 Great Deals out of 46,998 listings starting at $800
Used Nissan Maxima
293 Great Deals out of 17,088 listings starting at $1,295
Used Honda Civic
533 Great Deals out of 40,434 listings starting at $1,699
Used Chevrolet Camaro
316 Great Deals out of 27,098 listings starting at $2,700

Used Cars For Sale

2018 Chevrolet Malibu For Sale
78 Great Deals out of 30,477 listings starting at $12,507
2017 Chevrolet Malibu For Sale
77 Great Deals out of 4,186 listings starting at $11,980
2016 Chevrolet Malibu For Sale
92 Great Deals out of 4,646 listings starting at $9,824
2015 Chevrolet Malibu For Sale
108 Great Deals out of 4,223 listings starting at $5,400

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.