Hi, just bought a 2005 C2 diesel and within 1 mile of driving to home engine management light came on. Lack of power and think its in limp home mode.If you can get it to rev to 3000 rpm it makes a loud ticking noise with no power and belches smoke out off back for about 2 secs. I have downloaded fault codes and it came up with these.P0087 Fuel rail pressure too low P1351 camshaft pos sensor circuit range/performance problem bank 2 P0402 Egr flow excessive. Not sure where to start, any advice would be grateful.Thanks Ged.