Hi I've got a smoky 4.2, it started out on the nearside bank but now it's both banks, very smoky on start up but reduces after a while.

What colour smoke is it?

Are you loosing any oil or coolant? 2002 4.6 Vogue SE - Alveston Red with Lightstone Leather
2012 Range Rover 5.0 SC Autobiography in Indus Silver with Jet/Ivory Interior
2012 Range Rover 4.4 TDV8 Autobiography in Baltic Blue with Sand Interior
2013 Range Rover Sport SDV6 HSE Black Edition in Santorini Black with Ebony Interior

Hi Dhallworth, thanks for the prompt reply, this is a problem on my friends L322 which is bellowing smoke out on start up and is a bit embarrassing if anyone is close by.
We really thought it was terminal but now he's had it scanned and it turns out it could be a NOX sensor in Bank 1 so thanks for your reply and it's very much appreciated.

 2002 4.6 Vogue SE - Alveston Red with Lightstone Leather
2012 Range Rover 5.0 SC Autobiography in Indus Silver with Jet/Ivory Interior
2012 Range Rover 4.4 TDV8 Autobiography in Baltic Blue with Sand Interior
2013 Range Rover Sport SDV6 HSE Black Edition in Santorini Black with Ebony Interior