: Why did my car lock the keys inside?

07-23-08, 11:20 AM
So I get out at the gas pump, it honks three times to tell me the keys are inside, then honks once and locks the doors.

Why would it lock the doors if it sensed that the keys were inside?

I'm going to change my fob battery, but I'd like to know what caused it so as to avoid it happening again.

Benjamin Simon
07-24-08, 12:25 AM
This happened to me. Two things are likely possible. The most likely and simplest to fix is a weak battery in the FOB. The second is you will need to replace the FOB. This was my case. After replacing the battery, the car would not respond to my input on the FOB or the auto unlock when I pull the door handle.

07-24-08, 11:24 AM
How much was the new fob? It only had one with it, so I have been meaning to buy an extra.

07-24-08, 04:13 PM
Free under warranty, not to many of these STSs out there that have expired warranties, still under the 50k or 100k miles?

07-25-08, 08:21 AM
Has 52K, so warranty just expired.

Benjamin Simon
07-27-08, 12:59 PM
Looks like about $45. Lucky for you, you can program it yourself.
http://cgi.ebay.com/ebaymotors/CADILLAC-STS-05-06-07-KEYLESS-KEY-REMOTE-W-AUTOSTART_W0QQcmdZViewItemQQ_trksidZp4069Q2em14Q2e l1318QQhashZitem110272687466QQitemZ110272687466