I had an engine fault come up a couple of times but disappear by itself. The diagnostics said 'anti-pollution system faulty' as it's still within warranty I was able to catch it with the light on and take it back to be sorted. They changed the fuel rail pressure sensor for me but after collecting it today the turbo just doesn't feel up to much. It just feels like a standard car, whereas before I'm sure it had a kick to it. It's a 308 2.0 hdi gt (2008)... Any suggestions please?