What is P0401 on Ford F-150?

The P0401 code on a Ford F-150 indicates a problem with the exhaust gas recirculation (EGR) system. The EGR system is designed to reduce the amount of nitrogen oxides (NOx) emitted by the vehicle. When the EGR system is not functioning properly, it can cause the vehicle to fail emissions inspections and can lead to engine performance issues.

Some common causes of the P0401 code on a Ford F-150 include:

* A faulty EGR valve

* A leaking EGR gasket

* A clogged EGR passage

* A problem with the EGR control solenoid

* A problem with the PCM (powertrain control module)

If you are experiencing the P0401 code on your Ford F-150, it is important to have it diagnosed by a qualified mechanic as soon as possible. Driving with a faulty EGR system can lead to serious engine problems.

Here are some symptoms that may accompany the P0401 code on a Ford F-150:

* Check engine light is illuminated

* Engine is running rough

* Engine is stalling

* Engine is losing power

* Fuel economy is decreasing

* Emissions are high