2010 CRV

Asked by Feb 14, 2019 at 09:07 AM about the 2010 Honda CR-V

Question type: Maintenance & Repair

My car key has the key fob built in to the key.  Can a dead/dying battery in the
key fob keep the car from starting? Car battery is strong.  It does not have a
push button to start - you turn the key in the ignition.

3 Answers

79,595

The car recognizes the key by the fob code. If the code doesn't match, it could cause the car to not start, but it could also trigger the security system. When the fob battery gets low and tells you to replace it, you should do that immediately to avoid those consequences. At this point, after replacing the battery, you might have to reprogram the car to the key (explained in the owners manual, available on line, just google your car).

Thank you Ed92626. I have replaced the battery with the hope of that being my problem- Batteries Plus tested it and told me it had <10% life left. Followup questions: 1-I did not notice it being low, aka it still unlocked the doors, and it did not give me any indication (that I noticed) that it was trying to tell me it was low. I did not have to reprogram the car to the key. How does the fob battery tell me to replace it? 2-My car would 'turn over' - car battery was strong, but it just wouldn't go on and start. I was told that a weak battery in the key fob (which is part of the key I stick in the ignition / no start button in my model) could prevent the car from starting. Is that true?

79,595

Not sure about your car, but most cars display a warning message when a fob tries to communicate and the car can't quite read it.

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