Seat Ateca Key Battery Issue

The low battery warning, coupled with the keyless access failure, strongly suggests the key fob battery is the culprit. Have you tried using your spare car key to see if the issue persists? Also, could you check the battery voltage with a multimeter if you have one available? Low voltage can certainly trigger those symptoms and error codes.

I do not have a multimeter available at the moment. Is there a specific type of battery required for the car key of my Ateca? Also, will replacing the battery clear the error code, or does that require diagnostics?

Yes, it is very likely the low battery in the key fob. A CR2032 battery is commonly used, but it's best to confirm in your owner's manual or by inspecting the old battery before purchasing a replacement. Regarding the error code, it might clear automatically after replacing the battery, but a diagnostic scan might be necessary if it persists. If replacing the battery doesn't resolve the issue, a visit to a workshop may be required to investigate further. However, this is unusual.

As suspected, it was the key battery. I replaced it myself for 37€. Keyless entry is working again, and the error is cleared. Thanks for the confirmation and advice!