Hi all, I have changed the battery on my 2009 Scout today. Have opted to replace the Bosch S4 with the slightly more powerful S5. After changing, the battery light stays on even after driving it for a good few miles or around 1 hour. I turned ignition on and off a few times but still the light stays on. I'm assuming the ECU has a bit of an issue not being a factory original type. Is there anyway to get rid of it ? Any help would be appreciated.

Hello, welcome to the forum.

Your fault is most likely to be an issue with the alternator - or the wiring connections to it.

Was the engine running when you disconnected the battery to replace it?

No the engine was off when the battery was changed. I've tested the alternator and still working fine. Getting a charge to the battery with no drop when putting lights on, radio etc. The only change I have is the battery light staying on

Hi, welcome.

You're in the 'Hellos and Goodbyes' forum at the moment, you might be better looking at and/or posting in the 'Skoda Octavia Mk2 (2004 - 2013)' forum in case this might be a known issue there (link at bottom of post).

If you swapped from EFB to AGM did you have the battery 'coded' for the car's system (assuming start/stop car).

If the previous battery was allowed to go too low for the computers' liking, regardless of how bright the headlights seemed or no issues with starting the engine, then they can throw all sorts of unexpected wobbles, warnings, error codes, issues and problems.

If you don't have access to a scan tool I would try disconnecting the battery for a while and reconnecting to see if it might clear plus you might need to start the engine put the headlights on with air-con on and turn the steering fully both ways to let the car know you have plenty of battery power, and then go for a short drive and see if light remains on , or returns.

Bosch I was told are labelled Varta batteries.

HTH.

'Skoda Octavia Mk2 (2004 - 2013)' -https://www.briskoda.net/forums/forum/28-skoda-octavia-mk2-2004-2013/

Edited 19 March, 20251 yr by nta16
typo

nta16, thank for that. Will give it a go tomorrow.

Cheers

1 minute ago, daveyscout2009 said:

nta16, thank for that. Will give it a go tomorrow.

Cheers

Thanks. Have another look at my post as I was editing it to add info.