2008 C30 Key Fob issues

Pretribrapper · Post by **Pretribrapper** » 26 Sep 2023, 06:55

Ok so I have one key for my car. Fob starts the car and manual key unlocks the door. Issue is that when I manually unlock the door the alarm goes off. Key fob buttons don't work and I just replaced the battery. Best thing that I have figured out so far is to manually lock the doors and leave trunk unlocked. Anyone know quick way to fix or re pair the Fob with the car. I so have an info light in dash that says alarm service required

Post by **yagger** » 26 Sep 2023, 10:32

Most possible solution is new key.
Most likely your original key lost synchronization to CEM. It is common issue for 2008-2009 P1 platform.