What does the fuel pump warning light look like

The engine temperature is normal?
If any warning lights have appeared on your dashboard, this may point towards a faulty sensor such as throttle position sensor, Oxygen sensor ..

If you have no warning lights it sounds like a classic case of a faulty/failing fuel pump.


Nissan Sentra Fuel Pumps

The pump fits into the fuel tank.
A quick check you can do is to disconnect the fuel line somewhere in the engine bay and turn the ignition on. Fuel should literally spray out.

Before buying and fitting a new fuel pump get somebody - a workshop - to do a pressure check on it/ confirm that it is the fuel pump.

A faulty/failing fuel pump can work intermittently. One minute it's fine, the next minute it stops working.

Which vehicle??? Normally the low fuel warning light is on the instrument cluster, there should be an icon of a fuel bowser (gas pump) on the instrument panel, either on the speedo or the tacho face plate. When the fuel gets low, this icon will light up.

Usually attached to the Sending Unit of fuel pump(in the tank). The module will get its signal from the float arm. Look for components that touch the fuel pump float arm, then trace the wires. Keep us informed =D

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Yes I would say the oil pressure switch is faulty. The oil pressure gauge uses a different sensor, so if the gauge did not drop but the warning light came on, I would have the warning light switch checked. If the warning light comes on, the fuel pump will stop getting power and you will lose fuel pressure too.

Fuel Pump Module Removal & Installation To Remove:
WARNING
Highly flammable mixtures are always present in any fuel related component. Smoking or carrying lighted tobacco or an open flame of any type may ignite the flammable mixtures.
WARNING
Even when the engine is not running, fuel in the fuel system remains under high pressure. Fuel system pressure must be relieved before working on or disconnecting any of the fuel lines, fuel tubes, or fuel system components. Failure to do so may result in accidental spraying of fuel, personal injury, or a fire hazard.

1. Remove Fuel Tank. Fuel Pump
   
   
2. Remove fuel pump lock ring.
3. Remove fuel pump.
4. Remove and discard fuel pump O-ring.

To Install:

1. Install new fuel pump O-ring.
2. Install fuel pump.
3. Install fuel pump lock ring. Tighten to 66 ft-lb (89 Nm).
4. Install Fuel Tank.

Fuel Pump Module-in tank, no compartment to replace fuel pump Removal & Installation To Remove:
WARNING
Highly flammable mixtures are always present in any fuel related component. Smoking or carrying lighted tobacco or an open flame of any type may ignite the flammable mixtures.
WARNING
Even when the engine is not running, fuel in the fuel system remains under high pressure. Fuel system pressure must be relieved before working on or disconnecting any of the fuel lines, fuel tubes, or fuel system components. Failure to do so may result in accidental spraying of fuel, personal injury, or a fire hazard.

1. Remove Fuel Tank. Fuel Pump
   
   
2. Remove fuel pump lock ring.
3. Remove fuel pump.
4. Remove and discard fuel pump O-ring.

To Install:

1. Install new fuel pump O-ring.
2. Install fuel pump.
3. Install fuel pump lock ring. Tighten to 66 ft-lb (89 Nm).
4. Install Fuel Tank.

Fuel Pump Module —Vehicles with Returnless Fuel System Removal
WARNING: Do not smoke or carry lighted tobacco or open flame of any type when working on or near any fuel related components. Highly flammable vapors are always present and may ignite. Failure to follow these instructions may result in personal injury.

1. Remove the fuel tank.

1. Using the special tool, remove the fuel pump locking ring.

Remove the fuel pump module.
• Rotate the pump counterclockwise to remove.

1. Remove and discard the O-ring seal.
Installation
WARNING: Do not smoke or carry lighted tobacco or open flame of any type when working on or near any fuel related components. Highly flammable vapors are always present and may ignite. Failure to follow these instructions may result in personal injury.

1. Install a new O-ring seal and locking ring.

Fuel Pump Module —Vehicles with Returnless Fuel System
Special Tool(s) Wrench, Sender Unit, Fuel Tank
310-065A (23-054) Removal
WARNING: Do not smoke or carry lighted tobacco or open flame of any type when working on or near any fuel related components. Highly flammable vapors are always present and may ignite. Failure to follow these instructions may result in personal injury.

1. Remove the fuel tank.

1. Using the special tool, remove the fuel pump locking ring.

1. Remove the fuel pump module.
   • Rotate the pump counterclockwise to remove.

1. Remove and discard the O-ring seal.

Installation
WARNING: Do not smoke or carry lighted tobacco or open flame of any type when working on or near any fuel related components. Highly flammable vapors are always present and may ignite. Failure to follow these instructions may result in personal injury.

1. Install a new O-ring seal and locking ring.

1. To install, reverse the removal procedure.

in side the tank on the side of the pump there is what thy call a sender not to be confused with the sending unit. The sender is atached to the float and tells the gauge how much fuel you have.