Peugeot 408 Key Battery Low

I'm having trouble with my 2019 Peugeot 408 diesel. It has 228677 km. I'm getting a "key battery low" warning. Keyless access isn't working, there's an error stored, and the car won't lock/unlock reliably. Could it really just be the battery?

4 comment(s)

I also drive a Peugeot 408, though I don't remember the exact year. I had the same issue a while back. It started with the "key battery low" warning, then keyless entry got spotty before failing. Does the error message say anything specific about voltage or the key fob?

The error message doesn't give details. It just says there's a fault with the remote key. What fixed it for you?

A new battery in the key fob solved everything. I'd suggest getting the key fob tested by a shop, since it could be something else like a bad receiver in the car, but it's most likely the battery. I ended up going to the shop.

Thanks! Replacing the key fob battery fixed it. Cost me 37€. I appreciate you sharing your experience.

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