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Key immobilizer light flashing while driving #4440616
06/24/17 08:42 PM
06/24/17 08:42 PM
Joined: Apr 2013
Posts: 2,330
The Northeast
mclasser Offline OP
mclasser  Offline OP
Joined: Apr 2013
Posts: 2,330
The Northeast
I was driving my Accord to work and the green key immobilizer light randomly flashed for about 5 sec. It then turned off and hasn't come back on since. The car starts and drives fine and the security system engages normally when locked.

I'm thinking the original key is worn so I've switched to my never-used valet key. The new key seems to insert tighter into the cylinder. I'll keep monitoring but what else could be the cause here?


2018 Hyundai Elantra VE -- 4K
2013 Honda Pilot EX-L 4WD -- 56K
2002 Honda Accord EX-L -- 211K

Re: Key immobilizer light flashing while driving [Re: mclasser] #4440627
06/24/17 08:55 PM
06/24/17 08:55 PM
Joined: Jun 2003
Posts: 33,081
ME
eljefino Online content
eljefino  Online Content
Joined: Jun 2003
Posts: 33,081
ME
IDK but you might want to look into what it takes to program a new key. Sometimes it's two currently working keys OR an expensive trip to the dealer.

If your key is on its way out, get something good from its last gasp.

Re: Key immobilizer light flashing while driving [Re: mclasser] #4440778
06/25/17 01:54 AM
06/25/17 01:54 AM
Joined: Jun 2009
Posts: 3,698
Chicago, IL
tomcat27 Offline
tomcat27  Offline
Joined: Jun 2009
Posts: 3,698
Chicago, IL
With my Nissan that's an indication the battery is low in the fob


2019 Cherokee, 2015 Rogue, 2014 Sentra, 2001 Camry, 2005 Starcraft, 1998 Dodge B1500
1996 Sebring Jx, 1984 F150, 1970 Cougar, 2013 XT250, 2010 Vstar, 2014 CTX1300
Re: Key immobilizer light flashing while driving [Re: tomcat27] #4440852
06/25/17 07:06 AM
06/25/17 07:06 AM
Joined: May 2005
Posts: 10,279
ROCHESTER, NY
Char Baby Offline
Char Baby  Offline
Joined: May 2005
Posts: 10,279
ROCHESTER, NY
Originally Posted By: tomcat27
With my Nissan that's an indication the battery is low in the fob


I agree! It could also be in the ignition switch itself.
The system is trying to tell you something. What that something is, is what we don't know. Look for something simple first like, Oh IDK, have your battery load tested to see if you may have a bad cell.

OR for example, the '06 Mazda3 in my signature, the Engine Immobilizer [SOMETIMES] continues to flash & beep when the engine is shut off and key is "removed"...as if the key is still in the ignition w/door open. All we have to do is, reinsert the key(w/o turning it) and immediately pull out the key again.

It's been doing this for the 8 years we've owned the car! It just doesn't happen often enough to warrant any investigation.


"Retired"
-----------------------------------

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Re: Key immobilizer light flashing while driving [Re: mclasser] #4440938
06/25/17 09:09 AM
06/25/17 09:09 AM
Joined: Jul 2011
Posts: 1,224
Houston, TX
Coprolite Offline
Coprolite  Offline
Joined: Jul 2011
Posts: 1,224
Houston, TX
If you use the key to remotely unlock the car and don't get stellar range, try replacing the battery in it.

Re: Key immobilizer light flashing while driving [Re: mclasser] #4441019
06/25/17 11:00 AM
06/25/17 11:00 AM
Joined: Apr 2013
Posts: 2,330
The Northeast
mclasser Offline OP
mclasser  Offline OP
Joined: Apr 2013
Posts: 2,330
The Northeast
Thank you for the input everyone.

- The car battery is only 6 months old from AAP.
- The ignition switch was replaced under recall a few years back.
- The key fob range hasn't been that great for a while. I'll replace the batteries in both fobs.


2018 Hyundai Elantra VE -- 4K
2013 Honda Pilot EX-L 4WD -- 56K
2002 Honda Accord EX-L -- 211K


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