Cam phasers sensors have failed three times and repaired each time. Caused the engine to stall and accelerate poorly.The third time they failed a part was defected the dealer claimed. All this work was covered under the powertrain warranty. My safety could have been at risk as my vehicle did sputter and wouldnt accelerate at enough speed to keep up with traffic. Although I was not in an accident or hurt at this time. Yes, engine light has came on, on each occurrence. My powertrain warranty through ford will expire shortly and Im afraid I will be left with a large repair bill if this issue occurs again soon.