Vehicle Questions and Answers
Welcome to the Vehicle Q&A Hub. Find answers to your automotive questions, share your experiences, and get expert advice on vehicle maintenance, troubleshooting, and more!
1866 views
2 answers
The P0401 trouble code found in the Ford F-150 indicates a potential issue within the emissions system. This error is commonly linked to a faulty DPFE (Delta Pressure Feedback of EGR) sensor, a failing EGR valve and its associated components, or a problematic throttle body. The root cause of this problem is often due to improper recirculation of exhaust gases caused by environmental factors, component breakdown, or ECM malfunctions. The code signifies a lack of proper airflow within the system, highlighting a risk of the throttle body getting congested with dirt, sludge, and debris in its two designated ports. If your F-150's "check engine" light is illuminated and you notice hesitation while driving, it may be connected to a P0401 code triggered by EGR issues.
The OBDII fault code P0401 indicates that the engine's computer has identified an issue where there is not enough flow in the exhaust gas recirculation (EGR) system.