Key fob issue
Thread Starter
Intermediate
Joined: Jul 2011
Posts: 27
Likes: 0
From: Barrie Ontario
Key fob issue
Both of my key fobs stopped working. I read here about pressing both the lock / unlock buttons for about 10 seconds to reprogram. I did that and it worked for both key fobs. My problem is that when I walk away for a few minutes, the fobs won’t work. I have to reprogram them every time. (New batteries were put in) Any insight would be appreciated.
Instructor
Joined: Jan 2024
Posts: 194
Likes: 121
Had my C5 for a year now and same exact problem. Both fobs seem to lose sync with the car after a few days. I read somewhere on this forum that if you go through the learn process in the DIC and set up your existing fobs as if they are new fobs that can fix the problem. Haven’t had a chance to try it yet but if i do I’ll report back if someone else hasn’t already provided the fix.
Pro
Joined: Dec 2014
Posts: 683
Likes: 275
From: Cincinnati Ohio
Both of my key fobs stopped working. I read here about pressing both the lock / unlock buttons for about 10 seconds to reprogram. I did that and it worked for both key fobs. My problem is that when I walk away for a few minutes, the fobs won’t work. I have to reprogram them every time. (New batteries were put in) Any insight would be appreciated.
A second thing I’ve noticed. It seems like it fails to recognize my unlock when I had used the door power lock button to lock the doors as I was exiting the car rather than the fob.
Night Owl for life
Joined: Nov 2003
Posts: 24,725
Likes: 4,564
From: Bugs Bunny should'a made a left turn here
I see that you have a 2000 like me. I recommend upgrading your tpms system to the -01 to -04 style as they vastly upgraded the key fob range and the key fobs are dirt cheap.
Is not an easy mod to do but worth it in the end
Is not an easy mod to do but worth it in the end
Thread Starter
Intermediate
Joined: Jul 2011
Posts: 27
Likes: 0
From: Barrie Ontario
Thread Starter
Intermediate
Joined: Jul 2011
Posts: 27
Likes: 0
From: Barrie Ontario
Interesting, I’ve tried that and it worked. It what I found was that I need to be right next to the vehicle. Otherwise it won’t work. So I guess over the years, the remotes have lost the long range capability.
Advanced
Joined: Apr 2024
Posts: 72
Likes: 17
From: Cape Coral, FL
I had this same problem after a battery change. What I did to fix mine was turn the ignition to "on" but didn't start the car. Then did held the lock/unlock 10 seconds thing until the horn honked. Problem went away.
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Pro
Joined: Dec 2014
Posts: 683
Likes: 275
From: Cincinnati Ohio
Pressing the Lock and then Unlock buttons did help the Forum member who asked for help in this thread.