Was hoping someone could help me with my 308 1.6ltr turbo. Every cold start comes up with a depollution fault and goes into limp mode. Been at my mechanic who’s never let me down before but can’t find the issue. Found fuel pressure bit low so changed low pressure fuel pump, changed 4 coils, sent off injectors to be tested and cleaned and are all ok. Also found a lot of engine sludge and used some cleaner to remove it and manually cleaned it up pretty good as well. Still comes up with depollution fault??? Now he is thinking high pressure pump as well. Apparently cold start the fuel pressure should be 5000kpa but is around 4600kpa. Is that low enough to cause the fault or is it something totally different? Cars only done 108,000kms and serviced every 10,000. Any help would be appreciated.