- #11 FORD EXPEDITION FUEL PUMP LOCATION DRIVER#
- #11 FORD EXPEDITION FUEL PUMP LOCATION FULL#
- #11 FORD EXPEDITION FUEL PUMP LOCATION PRO#
- #11 FORD EXPEDITION FUEL PUMP LOCATION CODE#
Feedback Circuit – If there is an open circuit or corrosion in the monitor circuit to the ECM, the ECM won’t see fuel pump operation and will command the relay “off.”.Harness Damage – If there is damage to the harness going to the fuel pump, it can cause excessive resistance (corrosion), an open circuit (broken wire), an intermittent open circuit (partly-broken wire), or a short to ground (contacting the body or chassis).Relay – If the fuel pump relay is faulty, no voltage will go to the fuel pump or monitor.
#11 FORD EXPEDITION FUEL PUMP LOCATION CODE#
If voltage drops below a certain threshold, it will set DTC P0231, which is defined as “Low Voltage Fuel Pump Secondary Circuit.” What are the common causes of code P0231 ?ĭepending on year, make, and model, DTC P0231 may have number of causes. The ECM monitors the fuel pump relay secondary circuit for voltage. Insufficient fuel pressure can be caused by any number of electrical problems, one of which is poor voltage to the fuel pump. If there is insufficient fuel pressure, the fuel injectors won’t be able to deliver fuel properly, for example. To ensure proper fuel system function, everything needs to work in concert. If the ECM detects crank but not engine starting, using the RPM signal from the crank position sensor, it will turn off the fuel pump after a set period. On some vehicles, turning the key on will turn the pump, on for a few seconds, to prime the system. The ECM grounds the fuel pump relay control or primary circuit, which then feeds power to the fuel pump using the power or secondary circuit. Usually, the fuel pump relay is commanded by the ECM.
#11 FORD EXPEDITION FUEL PUMP LOCATION DRIVER#
Usually, the controller is part of the ECM (engine control module), though some vehicles, such as some diesels, may have a separate fuel injector driver module. The fuel pump and fuel injectors are operated electrically and electronically, so there are also fuses, relays, and a controller for these. The fuel system includes the fuel tank, a low-pressure fuel pump, sometimes a high-pressure fuel pump, fuel tubes and hoses, a fuel pressure regulator, and the fuel injectors. With regards to this DTC (diagnostic trouble code), we’ll be focusing on fuel. The internal combustion engine needs three basic things to start and run: air, fuel, and spark.
#11 FORD EXPEDITION FUEL PUMP LOCATION PRO#
We recommend Torque Pro What Does Code P0231 Mean? Wiring short to earth, fuel pump relay, ECM Roll the floor jack out from under the Expedition and then reconnect the negative battery cable to the battery.P0231 – Low Voltage Fuel Pump Secondary Circuit Lowīy Benjamin Jerew ( Contact Me) Last Updated ASE Master Tech Codeįuel pump relay -circuit low (Buy Part On Amazon)
#11 FORD EXPEDITION FUEL PUMP LOCATION FULL#
Reconnect the fuel pump wiring harness, fuel lines and fuel filler neck before raising the tank to the full height.īolt the gas tank retaining straps back into position with the socket set. Place the gas tank back onto the floor jack, roll it back under the Expedition and then raise it back into position. Tighten the retaining ring in reverse of how you removed it. Lower the new pump down into the tank, making sure to position the fuel level float in such a way that it does not contact the side of the tank. Lift the old fuel pump up and out of the gas tank. You’ll want to turn the ring counterclockwise. Wrap the rag around the tip of the screwdriver, place the tip against the fuel pump retaining ring and tap the handle of the screwdriver with the rubber mallet until the retaining ring turns loose. Roll the tank out from under the Expedition and set it on the ground. Lower the gas tank down using the floor jack, making sure to keep it level. Disconnect the fuel filler neck from the tank also using the screwdriver. The pump is in the top-center of the gas tank. Lower the tank several inches until you can reach your arm between the tank and the bottom of the Expedition.ĭisconnect the fuel pump wiring and fuel lines from the fuel pump by hand. Unbolt the gas tank retaining straps using the socket set.