So just yesterday my lock/unlock keyfob started acting funny. It locks and activates my security system, but when I press unlock it deactivates the alarm system but the doors don't unlock.

I changed the battery on the fob and it worked like normal for a day and now its acting up again. I've had to leave my car on valet mode so I dont get stuck with the alarm going off for five minutes while I try and shut it off and get into my car using the key itself.

Is my keyfob dying or is there something else going on?

 

maybe the batteries were bad? usually those things dont go bad unless you drop them alot. its a possibilty. do you still have your warranty?

 

No I don't, I bought the car used about a year go.

The battery I put in was brand new. How much would a keyfob replacement be?

 

I have never priced one on a lancer, but from previous experience anywhere from 20-100 dollars but call a mitsu dealership and they should be able to order you a new one and tell you how much it is.

 

wait.. you have an alarm system that came from mitsu? how is that cause lancers don't come with alarms... are you asking about a mitsu keyfob? or an aftermarket?

 

yeah wait a minute, alarm system, i was just thinking about the lock, unlock factory fob. i dont know anything about aftermarket ones especially with alarms involved, my bad

 

I bet it's an aftermarket keyfob, and when the battery died, it lost the programming to control the car doors. Probably needs to be reprogrammed, which the alarm manufacturer can tell you how to do, and it probably requires the stock keyfob.

 

really? when i replace my batteries its not affected... but he must have a different system as i have a viper alarm

 

Ha.. Mitsubishi + valet mode... lmao

Keyfob is probably banged up or something, might want to look into getting a replacement. I had a keyfob on my old taurus with an aftermarket alarm. Accidentally dropped the keys too much and the fob started acting funny.

 

order a keyfab from ebay and its only $14, let the dealer do the programing or you can do it yourself

 

Its an aftermarket alarm system (and its a POS), and the fob is the stock lancer fob (it has the mitsu logo on the back and all that good stuff).

http://cgi.ebay.com/ebaymotors/02-03...Q5fAccessories
Would that work?