What happens when the fuel pump module goes out?
When the fuel pump module in a vehicle fails, it can cause significant problems with the engine's ability to start and run properly. The fuel pump module is a critical component that plays a vital role in delivering the necessary fuel to the engine.
Understanding the Fuel Pump Module
The fuel pump module is responsible for drawing fuel from the gas tank and delivering it to the engine at the correct pressure. It typically consists of an electric motor, a fuel pump, and a fuel level sensor. The module is usually located inside the gas tank, although some vehicles may have an external fuel pump module.
Symptoms of a Failing Fuel Pump Module
When the fuel pump module starts to fail, it can exhibit several symptoms, including:
- Difficulty starting the engine
- Engine stalling or sputtering while driving
- Reduced engine power or acceleration
- Sudden loss of power while driving
- Fuel gauge reading inaccurate or erratic
These symptoms can indicate that the fuel pump module is not providing the necessary fuel to the engine, which can lead to further problems if not addressed.
Causes of Fuel Pump Module Failure
There are several common causes of fuel pump module failure, including:
- Electrical issues, such as a faulty wiring harness or a problem with the fuel pump relay
- Mechanical wear and tear, such as a worn-out fuel pump or a seized motor
- Contamination in the fuel system, such as dirt or debris
- Excessive heat or vibration, which can damage the module's components
If the fuel pump module fails, it will need to be replaced to restore proper fuel delivery to the engine.
Replacing the Fuel Pump Module
Replacing the fuel pump module can be a complex and time-consuming task, as it often requires accessing the fuel tank and disconnecting various components. It's generally recommended to have a professional mechanic perform this repair to ensure it is done correctly and safely.
In summary, a failing fuel pump module can cause significant problems with a vehicle's engine performance and should be addressed promptly to avoid further damage or breakdowns.
Can you drive with a bad fuel pump control module?
Yes, you can drive a car with a bad fuel pump control module, but not permanently.
How to tell if a fuel pump module is bad?
Common symptoms of a failing fuel pump control module (FPCM) include the engine not starting, stalling while driving, the "check engine" light illuminating, and poor fuel efficiency. Other signs can be a hesitation or stumbling during acceleration, a rough idle, and the fuel pump making unusual noises. Overheating of the module itself can cause intermittent failures, and this can sometimes lead to a melted connector or discolored pins.
This video explains the symptoms of a failing fuel pump: 1m8020 AutomotiveYouTube · Dec 31, 2023
Key symptoms of a bad FPCM
- Starting and stalling issues: The engine may crank but fail to start, or it may start and then stall unexpectedly. This can be caused by the module intermittently cutting power to the fuel pump.
- Check Engine Light: The illuminated "check engine" light is a common indicator, often due to codes related to fuel pressure, such as P069E.
- Reduced performance: You might experience poor fuel economy, hesitation during acceleration, surging, misfiring, or a general lack of power.
- Rough idle: The engine's idle speed may fluctuate, or the engine may run roughly.
- Audible signs: Instead of the normal quiet hum, you might hear loud or unusual whirring noises from the fuel pump.
- Overheating: The module can get hot, especially in warm conditions, which can lead to intermittent failure or even permanent damage. This can be identified by discoloration on the connector or pins, indicating excessive heat.
This video shows how to diagnose a fuel pump module failure: 1mHumbleMechanicYouTube · Aug 25, 2015
How long does a fuel pump module last?
In most cases, in-tank fuel pumps last 100,000 miles or more. While the module itself is not a maintenance item, you can take steps to maximize its lifespan. A clogged fuel filter can force the fuel pump to work harder, leading to premature failure.
How much does it cost to fix a fuel pump module?
The total cost to repair or replace a fuel pump control module (FPCM) typically ranges from $350 to $1300, with most vehicles falling between $500 and $600 for parts and labor. The final price varies based on the vehicle, the part's cost ($200–$900 for the part alone) and the amount of labor required, which can range from one to two hours or more depending on location and accessibility.
Cost breakdown
- Parts: The cost for a new fuel pump control module can range from $200 to over $900, depending on the vehicle's make, model, and the brand of the part. Some online retailers list parts anywhere from $100 to $550 for the module itself.
- Labor: Expect to pay between $125 and $300 for labor, although this can vary depending on the mechanic's hourly rate and how long the job takes.
- Diagnostic time: A mechanic will need to diagnose the issue, which can take around an hour. This cost is often included in the final bill.
- Total estimated cost: The total cost for a professional repair, including parts and labor, is estimated to be between $350 and $1300.
Factors that influence the cost
- Vehicle Make and Model: The price of parts and labor can vary significantly between different car makes and models. A more expensive or complex vehicle will likely cost more to repair.
- Part Brand: Aftermarket parts are generally cheaper than original equipment manufacturer (OEM) parts, but they may come with a shorter warranty.
- Location of the Module: The FPCM may be in a difficult-to-reach location in some vehicles, which can increase labor costs.
- Programming: Some replacement modules may require programming to work with your vehicle, which can add to the total cost.
DIY vs. Professional repair
- DIY: If you are comfortable with car maintenance, you can save on labor costs by replacing the module yourself. However, you will still need to purchase the part and have the right tools.
- Professional: For those who are not comfortable with DIY repairs, a professional mechanic is the best option. They can accurately diagnose the problem and ensure the new module is installed and programmed correctly.
