Vauxhall Adam Overvoltage Errors

I've got an Adam too. Had similar electrical gremlins a while back. Is it constantly throwing codes? Mine was, and it turned out to be a bad connection somewhere messing with the voltage readings. Check your grounds and connections before diving into replacing parts.

Yeah, constant codes. Which connections gave you trouble? I've checked the battery terminals, but haven't gone deeper yet.

For me it was a ground near the alternator. Check all the main grounds you can find. Honestly, tracing it was a pain. I eventually took it to a shop. They found it pretty quick with proper tools. Might save you some time and frustration. Sorry can't be more specific!

Appreciate the tip. Workshop diagnosed a heavily discharged battery. New battery and reset cost 290€. Seems sorted now. Cheers.