P1453, P1484, P1496 1.5dci 110 2014

Hi all. I have a 2014 mk3 Grand Scenic with the 1.5dCi 110 engine which has done about 120k miles. I have a loss of power and these 3 persistent fault codes which I can't clear - P1453, P1484, P1496. Also got the "check injection/check anti pollution" messages on the dash and the cruise control/speed limiter don't work.

So far i have replaced air, oil, fuel filters and EGR valve. After cleaning out the original EGR last week, I had much improved performance, almost like it should be...

P1453, P1484, P1496 1.5dci 110 2014