did a diagnostic check on my p1 last nite as it would not boost just hitting .5 fault 22 came up which i believe is the knock sensor so when it cooled down i checked the boost pipes they all seem to be fine so took it for another run and it was boosting fine it runs 1.5 bar at 405bhp its been fine all day today then the abs light came on at 90mph then the boost cut again so it wont boost now and theres no faults coming up on diagnostic its also got a knocklinck is it possible one of the knock sensors could be faulty?

 

its also got a andy forrest 20g with 1 bar actuator so if it was running actuator boost wouldnt it be .91 bar