Mine used to throw up the hdc, susp fault and the select neutral with transfer box symbol flashing , when turning left it turned out to be front left ABS sensor / wiring was busted , new abs sensor sorted it , it's to do with wheel speeds and when the wheel turns the worn wiring to the sensor stretches and goes open circuit ,

That sounds exactly like mine, especially as it was clunking when braking downhill. I'll check that out- thanks!

I'm almost certain it's the ABS sensor now. When I drove down my street last night with the icy roads, the ABS would not kick in & the car skidded. Just a matter of identifying which side has failed now