@Pixyflash
Yeah I only have the 2 settings. Not the tow settings, which I'm not bothered about.
I spoke to subaru and if you have all 4 tyres exactly the same. And the awd warning light keeps coming on, then that's when they need to change the DCCD controller because its too sensitive. As @david1972 posted.
Changing to a different set of tyres that aren't the recommended dunlops, shouldn't cause the AWD warning to come on.