What would cause door to lock when unlock is pushed inside vehicle?

Asked by Sep 10, 2016 at 07:03 AM about the 2000 Pontiac Grand Prix GTP Coupe

Question type: Maintenance & Repair

2000 Grand Prix GTP Coupe. Key Fob was working only intermittently with the trunk unlock feature only. The doors did not function at all, but using the switch inside of car, all work great. I had the car scanned for a check engine light and while I was there, checked my fob against a battery display to see if it was working. it showed ok for the trunk and lock function but not the unlock. I went to get in the car and noticed that the doors were locked. I thought maybe the tech locked them by mistake. I tried the fob but nothing worked. The window was down so I unlocked the door from the inside. When I opened the door, the alarm sounded. I silenced the alarm, put the key in the ignition, and when I started the car, the alarm sounded again. It did this every time I opened the door or started the car for a day then seemed to be ok. Now, when I push my switch inside to unlock, the actuator works in the opposite and locks the door. Please help! Thank You

3 Answers

95

the buttons on your key fob might be stuck in. try removing the battery from it. and then check your switch's inside the car. if it still is acting weird maybe try disconnecting your negative battery cable and letting everything in your car reset.

72,435

Sounds like a bad key fob. Replace it. Also, check the power lock switch on the passenger's side. If that one works ok, driver's switch is bad too. To program the new fob follow the instructions that come with the new fob. On your Grand Prix you'll need to remove the MALL PGM fuse that's in the glove box fuse box. This puts the BCM (Body Control Module) in program mode. When you have programmed the new fob(s) to the car. Reinstall the MALL PGM fuse. HTH. -Jim

Thank You both for great answers. I will try these tips and let you know what becomes of them. I greatly appreciate the quick responses.

Your Answer

Grand Prix

Looking for a Used Grand Prix in your area?

CarGurus has 2,677 nationwide Grand Prix listings starting at $1,750.

ZIP:

Pontiac Grand Prix Experts

  • #1
    Js08016
    Reputation
    4,470
  • #2
    Tom Demyan
    Reputation
    3,110
  • #3
    munron
    Reputation
    2,510
View All

Related Models For Sale

Used Chevrolet Impala
579 Great Deals out of 34,530 listings starting at $900
Used Pontiac Bonneville
485 listings starting at $2,995
Used Chevrolet Monte Carlo
10 Great Deals out of 1,251 listings starting at $999
Used Ford Mustang
594 Great Deals out of 39,484 listings starting at $1,895
Used Pontiac Grand Am
1,086 listings starting at $1,500
Used Chevrolet Malibu
1,062 Great Deals out of 62,272 listings starting at $880
Used Chevrolet Camaro
459 Great Deals out of 31,608 listings starting at $1,450
Used Pontiac Firebird
9 Great Deals out of 766 listings starting at $2,995
Used Jeep Grand Cherokee
1,059 Great Deals out of 72,201 listings starting at $1,195

Used Cars For Sale

2008 Pontiac Grand Prix For Sale
10 Great Deals out of 445 listings starting at $1,750
2007 Pontiac Grand Prix For Sale
4 Great Deals out of 368 listings starting at $2,295
2006 Pontiac Grand Prix For Sale
438 listings starting at $3,950
2005 Pontiac Grand Prix For Sale
358 listings starting at $4,488

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.