Where is the fuel pressure regulator on a Cherokee 1998 6L 4.0

Question

The check engine light is steady on; the ODB2 scanner is giving code P0001.

Answer 1

The fuel pressure regulator is located on the fuel pump. this code is not valid with your vehicle, The way the scan tool works is when you plug it in the OBD II port, it becomes a host to the PCM, there it exchange data the code it gives is what is stored in you OBD II scan tool library. You may have to use another scan tool, With the year of this vehicle , which is 1st generation OBD II, there was no code definition of P0001, If anything the code that is set when P0001 is set is a lean fuel trim code condition., this usually happens when there is a exhaust leak large enough to affect the performance of the upstream 02 sensor.