Key fob battery low. But tests OK - Ford B-Max Forum
 
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post #1 of 10 (permalink) Old 6th November 2019, 20:51 Thread Starter
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Key fob battery low. But tests OK

Hello everyone, a message recently appeared on the car display, stating " KEY FOB BATTERY LOW" . The battery was tested for voltage and load current, and tested O.K., but to be safe a new battery was fitted, but the message on start up remains, anybody got ideas?, thanks.
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post #2 of 10 (permalink) Old 7th November 2019, 10:45
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have you go two sets of keys?
it might be the battery in the other fob.
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post #3 of 10 (permalink) Old 7th November 2019, 13:15
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Just changed a battery in one of mine without any problems. Try pressing the OK button when the "Battery low" display is up.

John

Titanium X Tectonic Silver 1.0 125ps Eco.
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post #4 of 10 (permalink) Old 11th November 2019, 16:15
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Just had the same warning. Changed yhe battery in the key fob and the warning went away. Easy to change, the fob splits in half if you use a knife. I happened to have a spare as my bathroom scales use the same battery.

Only a few pennies on line if you don't have one, though I wonder how much a dealership or Timpsons might charge.

B Max Titanium X 1.0 125 bhp in Magnetic with built in SatNav and rear sensors.
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post #5 of 10 (permalink) Old 13th January 2020, 18:44
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Strange that a short while after changing both key batteries and directly after my 3 year service, the battery low warning returns.

Not quite sure if I can do some kind of reset.

B Max Titanium X 1.0 125 bhp in Magnetic with built in SatNav and rear sensors.
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post #6 of 10 (permalink) Old 13th January 2020, 19:10
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not all batteries are of equal quality
Quote:
Originally Posted by cianpars View Post
...Only a few pennies on line ...
often the £shop ones are excellent, but sometimes you have to use nice fresh 'branded' cells.
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post #7 of 10 (permalink) Old 14th January 2020, 10:55
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Yeah, I wondered that Gremlin, though they were well within their sellby date and also checked out ok with a multimeter.

Quite odd that the new batteries were fine and yhe warning came up when I picked yhe car up following its service.

I'm guessing there may be a reset procedure, though I can't seem to find one.

B Max Titanium X 1.0 125 bhp in Magnetic with built in SatNav and rear sensors.
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post #8 of 10 (permalink) Old 14th January 2020, 14:09 Thread Starter
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Just an update to my report of November 2019, I used new quality batteries, that measured 3.1 volts dc off load, since then all has been O.K., thanks.
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post #9 of 10 (permalink) Old 14th January 2020, 17:05
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Maybe just try removing and replacing batteries again ??

John

Titanium X Tectonic Silver 1.0 125ps Eco.
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post #10 of 10 (permalink) Old 25th January 2020, 16:07
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Had this at the end of last year, batteries were fresh and tested ok. But after a couple of weeks kept getting the warning.
Cleaned and eased up the spring terminals and no problem since.

B-Max Titanium powershift 1.6 2013 Marine Blue
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