My Vivaro was gradually losing power today, now struggling to get up hills with pedal almost flat to floor, noticed a couple of white smoke mornings a few weeks ago with smoke disappearing within 10 mins or so. I also had check Anti Pollution System filter flash up on screen, took to my usual garage and was checked and cleared from dashboard but today was the worst! Reading various reports I don't know whether it's the MAF filter, injectors, DPF or Turbo? Has anyone encountered this? If so would appreciate some tips or go to areas to help fix. My Taxi has 186k on the clock and has ALWAYS had a major service every 10k regardless and always maintained regularly. Any help please?