FIX P1631 Theft Deterrent System Password Incorrect
Thread Starter
Burning Brakes
Joined: Aug 2013
Posts: 952
Likes: 100
From: Lehigh Valley PA
2022 C5 of the Year Finalist - Modified
FIX P1631 Theft Deterrent System Password Incorrect
My good friends (DanA and others) gave me the codes to diagnose my DIC codes.
Here is the "major" issue. The security light flashes on and off when the driver's door is open. Note: no key in ignition yet and then remains permanently on while I drive the car. Based upon the info I have, the PCM and BCM have different passwords.
How do you fix?
Here is the "major" issue. The security light flashes on and off when the driver's door is open. Note: no key in ignition yet and then remains permanently on while I drive the car. Based upon the info I have, the PCM and BCM have different passwords.
How do you fix?
Melting Slicks
Joined: Sep 2008
Posts: 3,138
Likes: 802
From: Espanola New Mexico
The Security light should flash when the door is open and then turn off when the door is closed. As to why you have the security light while driving is something I have not heard about. You might try the BCM/PCM relearn procedure it's here on this site, I don't know the procedure well enough from memory myself.