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Last updated and verified on 12th February 2023
What are the main symptoms of a bad fuel pump? Difficulty starting the engine, loss of power or acceleration while driving, engine stalling or shutting off, loud whining or humming noise from the fuel tank, warning lights, such as the “check engine” light, coming on, and reduced fuel efficiency or increased fuel consumption.
As an experienced Range Rover owner, I know that a properly functioning fuel pump is essential for the vehicle’s smooth operation. A faulty fuel pump can cause various problems, from poor performance to complete engine failure.
I had a ‘P0088 fuel rail/system pressure – too high‘ one time when I had a low amount of diesel in my tank, and that is the best giveaway that there is a problem with your fuel pump.
In this article, I’ll explore the signs, symptoms, and causes of a failing fuel pump, as well as the steps you can take to fix it.
Key overview
- A failing fuel pump can cause many problems, including poor performance, stalling, and difficulty starting the engine.
- Common causes of a failing fuel pump include a clogged fuel filter, a malfunctioning fuel pressure regulator, or a damaged fuel pump.
- In some cases, a failing fuel pump can be diagnosed and repaired without the help of a mechanic.
Signs and symptoms of a fuel pump fault
- Difficulty starting the engine or a lack of power when accelerating
- Stalling or sputtering while driving
- Unusual noises coming from the fuel tank area
- Warning lights or codes on the dashboard, such as a “low fuel pressure” or “fuel pump malfunction” code
What OBD codes may appear due to the fuel pump not working?
The OBD codes that may appear due to a malfunctioning fuel pump on a Range Rover may include:
- P0087: Fuel Rail/System Pressure – Too Low
- P0088: Fuel Rail/System Pressure – Too High
- P0191: Fuel Rail Pressure Sensor Circuit Range/Performance
- P0192: Fuel Rail Pressure Sensor Circuit Low Input
- P0193: Fuel Rail Pressure Sensor Circuit High Input
- P0230: Fuel Pump Primary Circuit Malfunction
- P0231: Fuel Pump Secondary Circuit Malfunction
- P1235: Fuel Pump Control Circuit Malfunction
- P1237: Fuel Pump Control Out of Range
- P1238: Fuel Pump Control Circuit High
- P1239: Fuel Pump Control Circuit Low
Check the fuel supply lines and pump
Most likely causes
- Clogged fuel filter
- Malfunctioning fuel pressure regulator
- Worn or damaged fuel pump
- Faulty wiring or connections
Can it be fixed without a mechanic?
In some cases, a failing fuel pump can be diagnosed and repaired without the help of a mechanic. For example, a clogged fuel filter can often be easily replaced, and worn or damaged wiring can often be repaired or replaced.
However, a mechanic’s expertise may be required in other cases, such as a malfunctioning fuel pressure regulator or a damaged fuel pump.
Parts you’ll need
- Replacement fuel pump
- Replacement fuel filter
- Replacement fuel pressure regulator (if applicable)
- Replacement wiring or connections (if applicable)
Tools you’ll need
- Basic hand tools such as pliers, wrenches, and sockets
- Fuel pressure gauge
- Fuel pump removal tool (if applicable)
How to fix it
- Disconnect the battery and relieve the fuel system pressure.
- Raise and support the vehicle.
- Remove the fuel pump.
- Replace the fuel pump and filter.
- Reinstall the fuel pump.
- Connect the battery and test the fuel system for leaks.
- Start the engine and check for proper operation
Alternative causes if it isn’t the fuel pump
A clogged fuel tank vent valve
A damaged fuel tank
A malfunctioning fuel level sensor
Summary
A failing fuel pump can cause a variety of problems for your Range Rover, from poor performance to complete engine failure. By being aware of the signs, symptoms, and causes of a failing fuel pump, you can take steps to diagnose and repair the problem before it becomes a major issue. With the right tools, parts, and knowledge, some repairs can be made without the help of a mechanic, but in other cases, a mechanic’s expertise may be required.
FAQs
What are the signs of a bad fuel pump?
Difficulty starting the engine, loss of power or acceleration while driving, engine stalling or shutting off, loud whining or humming noise from the fuel tank, warning lights, such as the check engine light, coming on, and reduced fuel efficiency or increased fuel consumption.
Can a fuel pump go bad without warning?
A fuel pump can go bad without warning, but it is more likely that there to be warning signs before the pump completely fails. Gradual wear and tear on the pump can cause it to function less efficiently, resulting in the warning above signs. Regular maintenance and check-ups on the fuel pump can help detect potential issues before they become major problems.
Thank you for reading, please leave a comment if you need further help or suggestions for inclusions.
