Category: P0231

2004 Ford F250 5.4 Liter, Engine Stalls, Code P0231

This 2004 Ford F250 with a 5.4 liter gas engine came in with the complaint that the engine would occasionally stall. Testing found a code P0231 stored which indicates a problem with voltage to the fuel pump. Studying a wiring diagram showed several things. Number one is that when the fuel pump relay is engaged … Continue reading “2004 Ford F250 5.4 Liter, Engine Stalls, Code P0231”

2003 Ford Expedition, No Run, No Fuel Pump Operation, Code P0231

This 2003 Ford Expedition came in with a no run condition. A quick check found no fuel pressure and a code P0231 (low voltage on fuel pump monitor circuit). I decided to go to the interior fuse box, where my wiring diagrams, stated the fuel pump relay and fuse are located. There are a couple … Continue reading “2003 Ford Expedition, No Run, No Fuel Pump Operation, Code P0231”