If you cant start it a CPS might be at fault agreed, but they dont often show a code. I had a situation with a 2008 A8 TDI and when hot mainly it wouldnt start and new CPS sorted it - took much head scratching and injector testing etc. Cant recall where they are on the S8 but they are usually easy to replace and not expensive and whilst i hate throwing parts at cars to fix a problem without diagnosing 1st, sometimes its a more economical use of time / money and the only option.
Last edited by brasiliangringo; 1st April 2015 at 10:36 AM.
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