Fob battery replaced and still getting the low battery warning
21 - 31 of 31 Posts
Joined
·
7,147 Posts
Probably corrosion, grime, dust etc inside the one fob which is limiting the power that can be pulled from the battery (even if new). Often this same problem causes the battery to leak current thus shortening its life relative to similar fobs. If cleaning around the battery and button areas, ensuring the battery contacts are clean and shiny doesn't resolve...call it a bad fob and either put it in a drawer and move on or replace if you must.
Joined
·
1 Posts
This is an OLD thread and key FOBs have changed so much from 2010 to 2021. However I happened upon this post after seeing that low battery warning after a new battery was put in. Today, what works is to tap the brake and use the key to push the start button. It'll program itself and in a perfect world, the warning msg should be gone. I hope this helps someone.
Joined
·
1 Posts
Just unplug the battery terminal for 1min and reconnect then it should work
Fobs work the exact same way they always have but just more complicated. Battery is not all that can be wrong there. The bracket holding it can crack to lower power as the circuit not working as well. Dropping fob can easily crack the no lead solder used now that gives so many problems. The antenna can damage too both in car and fob to complicate issues. Bad antenna in fob will act exactly like low battery and give the same message. Even your fingers getting in there messing with battery can corrode the contacts to not work right even if they look perfect, a mark of low volt circuits. I have one so finicky you have to spin the battery a bit to change position and contact, then it works fine until unused for several hours, then you have to do it again. Brand new name brand battery in it. I could coat the contacts with grease to stop that but too lazy so far.
So many never think of all the simple things that can go wrong there.
So many never think of all the simple things that can go wrong there.
Had the same problem with both my fobs (2009 370). Saw this and it worked for me. Pretty simple and makes sense! https://www.bing.com/ck/a?!&&p=51c3...N0ZEOUE4QSZ2aWV3PWRldGFpbCZGT1JNPVZJUkU&ntb=1
YES. Loose contacts are another one. They can be showing you the contact has cracked the solder again to be loose or the contact just gets loose from dropping the fob. Be careful rebending the contacts, common to break the solder again doing it because the lead free solder now used is so brittle.
I mentioned corrosion above, it may not be visible at all. I often sand contacts with #600 sandpaper and then lightly coat with grease to stop air getting to them. Because I live in a high humidity area that kind of invisible corrosion can drive you nuts when your remotes don't work. I have one to get it working I have to pop apart and simply spin the battery and it goes back to working right for maybe another month. I need to grease coat that one but haven't yet. Here you even have to do a flashlight or it quits working in a couple days, grease on contacts and no more trouble. Ridiculous.
I mentioned corrosion above, it may not be visible at all. I often sand contacts with #600 sandpaper and then lightly coat with grease to stop air getting to them. Because I live in a high humidity area that kind of invisible corrosion can drive you nuts when your remotes don't work. I have one to get it working I have to pop apart and simply spin the battery and it goes back to working right for maybe another month. I need to grease coat that one but haven't yet. Here you even have to do a flashlight or it quits working in a couple days, grease on contacts and no more trouble. Ridiculous.
Joined
·
7 Posts
You can also check this blog for more detailed info-
www.usedengines.us
How To Know If The Car Battery Is Dead?
A dead car battery is scarry - read this blog to understand the early signs of a dying battery.
www.usedengines.us
Joined
·
30 Posts
That was scary....lol
21 - 31 of 31 Posts
