morgan
So yesterday had to disconnect and charge the battery , it may not have caused the issue but seems like a strange coincidence. Since then stereo lights up and display shows but no sound then will kick in again, while driving with stereo turned off horrible popping noise through speakers then stops , also rear park sensors don't work while stereo is not working .
Checked the fuses and all good . Is it likely to be the head unit or the amp ?
And if so does anyone have or are wrecking an xc90 or are there cheap aftermarket options ?
pastry
Did you put the key in Pos 2 ("II") when connecting the battery back up?
morgan
@pastry no should I have ? Ignition was off
pastry
it is recommended but I think it's a precautionary thing to do with airbags rather than a "do this or it will mess up your electrics" situation. But yes, I always do it.
I had a quick google, it sounds like it may be a failed parking sensor.
Do you have a basic code reader? I'd check if anything useful is stored there.
Otherwise I would try disconnecting the battery, leaving it for half an hour or so, then reconnecting with key in pos II - just to try it.
pastry
to answer your other question.. yes, there are XC90s being wrecked left right and centre! But often hugely overpriced.