Electronic Key Not Detected- Cold Weather or Battery?
Cadillac
 

Cadillac Forums | Help Us Help You | Advertise | Cadillac Parts | Cadillac News | Cadillac Classifieds

Cadillac Technical Archive | Cadillac Dealers | Cadillac Reviews | Cadillac Dealer Reviews | Cadillac Vendors

+ Reply to Thread
Page 1 of 4 1234 LastLast
Results 1 to 15 of 51
Like Tree11Likes
2008-2013 Cadillac CTS General Discussion Discussion, Electronic Key Not Detected- Cold Weather or Battery? in Cadillac CTS Second Generation Forum - 2008-2013; We're setting record low temps here in Chicago today and my car didn't start due to the "Electronic Key Not ...
  1. #1
    norbybra is offline Cadillac Owners Member
    Automobile(s): 2008 CTS
    Join Date
    Jan 2015
    Age
    33
    Posts
    1

    Electronic Key Not Detected- Cold Weather or Battery?

    We're setting record low temps here in Chicago today and my car didn't start due to the "Electronic Key Not Detected" prompt. I've had my 2008 CTS since March of 09' but haven't had a battery changed. The battery light has never come on and the car has been working fine until the cold air hit this week. Any thoughts on whether it's the physical key fob or if I should look into changing the battery immediately?

  2. Remove Advertisements
    Cadillac Forums
    Advertisements
     

  3. #2
    jjromano is offline Cadillac Owners Member
    Automobile(s): 2011 CTS AWD
    Join Date
    Oct 2014
    Age
    42
    Posts
    49

    Re: Electronic Key Not Detected- Cold Weather or Battery?

    change the battery in the FOB
    Same thing has happened with my Durango, Changed the battery and it solved the issue.
    EVH5150 and EVH5150 like this.

  4. #3
    tinman's Avatar
    tinman is online now Cadillac Owners 10000+ Posts
    Automobile(s): '14 CTS-V Long Roof 6MT; '10 CTS Long Roof, '16 ATS-V Sedan
    Join Date
    Jul 2006
    Location
    Jacksonville, Florida
    Posts
    13,147

    Re: Electronic Key Not Detected- Cold Weather or Battery?

    While I don't have the cold weather thankyouverymuch, I agree with jjromano - change out the fob battery. It is definitely the cheaper path if you are wrong and it turns out to be the car battery.

  5. #4
    dneiding is offline Cadillac Owners Member
    Automobile(s): 2011 CTS Coupe AWD
    Join Date
    Apr 2012
    Posts
    21

    Re: Electronic Key Not Detected- Cold Weather or Battery?

    Its been very cold here in Ohio the last few days as well. Tuesday: Let my FOB in the car (single digits outside) and got the "Electronic Key Not Detected" message. Changed the battery and still got the message when leaving the FOB in the car out in the cold. Wednesday and Thursday: took the FOB inside and have not get the message at all.

    It seems to me the extreme cold might have an effect on the FOB.

  6. #5
    smokescreen1030's Avatar
    smokescreen1030 is offline Cadillac Owners Member
    Automobile(s): 2011 CTS Coupe
    Join Date
    Nov 2014
    Location
    SW Virginia
    Age
    25
    Posts
    61

    Re: Electronic Key Not Detected- Cold Weather or Battery?

    You guys are crazy. My fob never leaves my ass pocket.

    Also, I think I read in the manual at some point that putting the the fob directly into the little cubby in the center console behind the shifter gives it it's best chance at making a connection. Just a thought.

    Do the other functions of the remote still work?
    sionnan and sionnan like this.

  7. #6
    smithb is offline Cadillac Owners Enthusiast
    Automobile(s): Cadillac
    Join Date
    Oct 2006
    Posts
    738

    Re: Electronic Key Not Detected- Cold Weather or Battery?

    Its the keyfob battery. Mine would work intermittently* and I thought it was something else since it would work sometimes, but changed my key fob battery and it has worked flawlessly since.

    * It would not work when I walked up to the car and pulled the handle, but it would if I hit the unlock button. Then when I got in the car would not start ("key fob not detected" warning) and would not work right away when i put it in the armrest holder, but would eventually start. All that made me think it was the RF sensor on the driver's side, but the new battery fixed everything.

  8. #7
    MsSunshine432 is offline Cadillac Owners Member
    Automobile(s): 2009 CTS
    Join Date
    Mar 2018
    Posts
    1

    Re: Electronic Key Not Detected- Cold Weather or Battery?

    I'm having the same issue with my 09 CTS, but I've changed the battery in the FOB and the car still will not start unless the FOB is in the transmitter pocket. Strange thing is that everything else works on the remote including the remote start button. If I use the remote start, once I get into my vehicle, the remote has to go directly into the transmitter pocket to start the vehicle to drive. Is it time for a brand new remote?

  9. #8
    cawengr's Avatar
    cawengr is offline Cadillac Owners Fanatic
    Automobile(s): 2011 CTS Performance Coupe -3.6 DI 6 Speed Manual
    Join Date
    Apr 2005
    Location
    Oak Lawn Il.
    Posts
    433

    Re: Electronic Key Not Detected- Cold Weather or Battery?

    I had some of the same issues, checked the battery and it was good. While I had the cover off I decided to clean all the contacts with some PC Board Terminal Cleaner, I did the battery, the case battery clips and the PC board contact points including the touch pads. This took about 15 minutes, put everything back together and it works like new. Probably had a bad contact somewhere.
    Long and Long like this.

  10. #9
    bobstoy is offline Cadillac Owners Fanatic
    Automobile(s): 2010 CTS Premium
    Join Date
    Apr 2014
    Location
    MN
    Posts
    179

    Re: Electronic Key Not Detected- Cold Weather or Battery?

    I am having same problem. Have not found the cure yet. Seems if the contacts were dirty, that none of the buttons would work. You dont have to press any buttons to start the car. Also rare that both fobs would fail at the same time.

  11. #10
    cawengr's Avatar
    cawengr is offline Cadillac Owners Fanatic
    Automobile(s): 2011 CTS Performance Coupe -3.6 DI 6 Speed Manual
    Join Date
    Apr 2005
    Location
    Oak Lawn Il.
    Posts
    433

    Re: Electronic Key Not Detected- Cold Weather or Battery?

    How do you start the car without pressing a button ???

  12. #11
    tinman's Avatar
    tinman is online now Cadillac Owners 10000+ Posts
    Automobile(s): '14 CTS-V Long Roof 6MT; '10 CTS Long Roof, '16 ATS-V Sedan
    Join Date
    Jul 2006
    Location
    Jacksonville, Florida
    Posts
    13,147

    Re: Electronic Key Not Detected- Cold Weather or Battery?

    You don't. You turn the ignition switch.

  13. #12
    bobstoy is offline Cadillac Owners Fanatic
    Automobile(s): 2010 CTS Premium
    Join Date
    Apr 2014
    Location
    MN
    Posts
    179

    Re: Electronic Key Not Detected- Cold Weather or Battery?

    On the cars with Remote Keyless Entry, the fob must be in your pocked or purse, inside the car. Then you step on the brake and turn the knob. Knob looks just like others except there is no key slot. While researching this problem, i read the car battery voltage must be at least 10 volts. Yesterday i took the battery in and had it load tested. It checked as good. Today it started as normal. Maybe disconnecting the battery helped ?

  14. #13
    tinman's Avatar
    tinman is online now Cadillac Owners 10000+ Posts
    Automobile(s): '14 CTS-V Long Roof 6MT; '10 CTS Long Roof, '16 ATS-V Sedan
    Join Date
    Jul 2006
    Location
    Jacksonville, Florida
    Posts
    13,147

    Re: Electronic Key Not Detected- Cold Weather or Battery?

    When you disconnect the battery be sure to follow the reconnect procedure as outlined in your manual.
    Long and Long like this.

  15. #14
    Long's Avatar
    Long is offline Cadillac Owners Master
    Automobile(s): '89 Coupe deVille 4.5L V8, '10 CTS4 3.6L DI Performance/Luxury sedan
    Join Date
    Jan 2017
    Location
    Central New York
    Age
    44
    Posts
    6,009

    Re: Electronic Key Not Detected- Cold Weather or Battery?

    Quote Originally Posted by bobstoy View Post
    On the cars with Remote Keyless Entry, the fob must be in your pocked or purse, inside the car. Then you step on the brake and turn the knob. Knob looks just like others except there is no key slot. While researching this problem, i read the car battery voltage must be at least 10 volts. Yesterday i took the battery in and had it load tested. It checked as good. Today it started as normal. Maybe disconnecting the battery helped ?
    Perhaps by disconnecting/reconnecting the battery, you effectively 'cleaned' the terminals like cawengr outlined in post #8.

    On a similar note, I had this same message come up when my car was under warranty. The FOB battery was fresh and I still got the "electronic key not detected" verbage. The dealer reprogrammed my existing FOB and the issue went away.
    silversport and silversport like this.

  16. #15
    cawengr's Avatar
    cawengr is offline Cadillac Owners Fanatic
    Automobile(s): 2011 CTS Performance Coupe -3.6 DI 6 Speed Manual
    Join Date
    Apr 2005
    Location
    Oak Lawn Il.
    Posts
    433

    Re: Electronic Key Not Detected- Cold Weather or Battery?

    Sorry, I thought you said the remote start wouldn't work. I see said the blind man.

    When I had my issue I got the Electronic Key Not Detected message but after cleaning everything up I have not had the error. You might also want to bend the two contacts from the battery clip that hits the PC board a little to assure good contact on the fob.

Quick Reply Quick Reply

Register Now

Please enter the name by which you would like to log-in and be known on this site.

Please enter a password for your user account. Note that passwords are case-sensitive.

Please enter a valid email address for yourself.

What Cadillac(s) do you own? (Or type NONE)

Please select your insurance company (Optional)

Log-in


Bookmarks

Cadillac Posting Rules

  • You may post new threads
  • You may post replies
  • You may not post attachments
  • You may not edit your posts
  •  
Read about Lincoln | Buick | Genesis | Kia Forte Forum