Sounds like the battery..........
Key FOB Ghost
Thread Starter
Racer
Joined: Sep 1999
Posts: 416
Likes: 11
From: Baltimore MD
Key FOB Ghost
New problem developed wit my primary key FOB. It will not stay synchronized with the VEt. It will sync and work fine, 2 hours later it's dead again. The second FOB works fine. Do FOB's go bad? Is the a freq. chips in them? Thanks
Drifting
Joined: Oct 1999
Posts: 1,712
Likes: 7
From: Sunnyvale CA
Originally Posted by RonC
New problem developed wit my primary key FOB. It will not stay synchronized with the VEt. It will sync and work fine, 2 hours later it's dead again. The second FOB works fine. Do FOB's go bad? Is the a freq. chips in them? Thanks
Tech Contributor
Joined: Dec 1999
Posts: 32,910
Likes: 2,402
From: Anthony TX
CI 6,7,8,9,11 Vet
St. Jude Donor '08
Check your DTC codes that are storred in the DIC. if you have a ton of U series codes, your 12 volt DC car battery could be low or going bad. If your main battery is weak and the B+ line voltage goes low, the RFA Module and many of the other modules will go off line and your FOBs can loose sync. As soon as the voltage returns to normal, the off line modules set the U code and returns to normal operation. The voltage usually goes LOW durring engine cranking when your sucking major amps out of the battery.
If you depress LOCK and UN-LOCK on the FOB at the same time and hold it until the horn beeps, that resyncs the FOB.
How old is your battery??
Bill C
If you depress LOCK and UN-LOCK on the FOB at the same time and hold it until the horn beeps, that resyncs the FOB.
How old is your battery??
Bill C
Thread Starter
Racer
Joined: Sep 1999
Posts: 416
Likes: 11
From: Baltimore MD
Have a new Optima in. If it was the battery i would not think the second FOB would work OK. I am going to try the contacts tonight. This is the normal FOB I use so it has a lot of use the the contact make a lot of sense. 
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The fobs do eventually wear out. If the car's battery and the fob's battery check out OK, then it could very well be the fob that is needing replacement.
