This started soon after new, at first Vauxhall service could not find problem, after month still doing it but would not give up an error code, odd ran ok if i added a bottle of RedX to a full tank, untill now 30,000 RedX still helps but will still play up at odd times,have cleaned the EGR valve no help as yet, looking to plate it after MOT, have changed the Boost Pressure /MAP Sensor,no help I have a app for OBDii and note the obdii reads 0ma and 0v on oxegen when running ? and both the EGRs read 0 have seen 99.42% 1 or 2 times, any addvice please.