Thecost to replace a fuel rail pressure sensor can vary quite a bit depending on make and model of your vehicle. On average, expect to pay between $200 and $340 total for a fuel rail pressure sensor replacement. Parts alone will set you back about $60 to $100 and the labor cost to replace the sensor will cost between $140 and $240. Everyonereading knows that is a common symptom for a bad main relay among other problems it can cause. Wasn't able to hear the fuel pump pre-start to pressurize the lines. All the panel lights are working. Battery is fairly new. The car has never stalled on the road or lost power that wasn't caused by the transmission failing. 1 Car suddenly stalls while operating. One of the most common symptoms of a failed ignition relay is a car that suddenly stalls while operating. If the ignition relay shorts, burns out, or otherwise fails while the engine is operating it will cut off power to the fuel pump and ignition system. Thejuice for the fuel pump actually comes from the ign switch to the ASD relay and then to the fuel pump relay. The PCM indirectly grounds the fuel pump by grounding the two relays (ASD & fuel pump relays) which sent power to the fuel pump. Measuring for 12v down at the fuel pump harness would cut to the case; as Joe has suggested. Thatthe fuel pump inertia switch is OK (not tripped). That the wiring between the fuel pump and the fuel pump relay is OK. The next step is to make sure that the EEC computer (fuel injection computer) is activating the fuel pump. For this test, go to: TEST 4. CASE 2: Fuel pump came on but the fuel pressure WAS NOT at specification (35-45 PSI Checkthe Fuel Pump Relay: Inspect the fuel pump relay for signs of damage or corrosion. A faulty relay can prevent the pump from receiving power, leading to fuel delivery issues. diesel fuel is used to lubricate diesel fuel pumps. When the engine is run on low fuel levels or with bad-quality fuel, the moving parts of the pump experience Sometimethe ASD Auto-Shut-Down-Relay can go bad and shut the fuel off. Have the mechanic swap the relay with one of the same in the fuse box and see if it will start. NOTE: Sometimes when a fuel pump goes bad you can hit on the tank right where the pump sits and it will wake the pump back up and it will start, but still needs to be Overvoltageprotection relay 1: 2: Fuel pump relay: 3: Heated rear window relay: 4: Overvoltage protection relay 2: 5: Fuel filler flap relay: F46--F47: 15A/20A: Auxiliary heater: F48: 5A: Anti-dazzle interior mirror, alarm system in car movement control module, alarm system gradient sensor, alarm system horn: F49: 30A: Suspension compressor Visit build your own, order from us, or obtain additional details. We do not sell these on Amazon. If your 2007-2021 Dodge, Inthis article, we consider the fourth-generation Ford F-Series Super Duty, available from 2017 to the 2019. Here you will find fuse box diagrams of Ford F-250 / F-350 / F-450 / F-550 , and 2019, get information about the location of the fuse panels inside the car, and learn about the assignment of each fuse (fuse layout) and relay 1OM50.