A faulty IAT sensor in your 6.4L Powerstroke can cause a whole slew of problems in the way your Powerstroke runs because the ECM is not able to properly determine the accurate air temperature, which effects timing, duration, and many other factors. If your IAT is in need of replacing, check out this options from the professionals at Alliant.

OEM Part Number: 1875838C91 | 8C3Z12A697B | DY1112