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sarah_thunder1

C8 Key Battery Warning

My Citroen C8, 2010 gasoline, is showing a 'key battery low' warning. Keyless access is dead, and there's an error stored. Unlocking/locking is also acting up. Could it just be the key battery?

4 comment(s)

isabellamaier88

Sounds like a flat key fob battery. Have you tried replacing it? It's usually a CR2032. Does the spare key work?

sarah_thunder1 (Author)

Thanks! I haven't replaced it yet, but will try. Where do I find a CR2032, and do I need special tools to open the key?

isabellamaier88

You can get a CR2032 at most supermarkets or electronics stores. Usually, a small flat-head screwdriver or even a knife will pry it open. If you're not comfortable, a locksmith or workshop can do it. But based on the symptoms, I'd bet on the battery. They should check for error codes anyway.

sarah_thunder1 (Author)

Thanks! It was the key fob battery. Replaced it today, and everything's working. The error is gone, and keyless entry works. New battery plus labor cost me 37€.

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