Fuel Pump Control Module Performance
The fuel pump control module is not operating as expected.
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What it means (plain English)
The fuel pump control module is supposed to control the fuel pump's on and off operation to maintain proper pressure, but it's not doing that like it should.
What the computer is actually seeing
The module receives signals indicating fuel pump status (on/off) and engine demands, then regulates power accordingly. If it sees an error, it triggers the code.
What a healthy reading looks like
The fuel pump should run at 12-13.5 volts and maintain a fuel pressure of 40-60 psi during operation, depending on the vehicle.
Guided diagnostic — the DiagCoach way
Don't just throw parts at it. Walk through these in order — each step tells you whether to keep going or stop and fix what you found.
- 11. Check for any visible damage or corrosion on the wiring and connectors related to the fuel pump and control module.
- 22. Verify battery voltage at the fuel pump control module. It should read between 12-14 volts.
- 33. Use a multimeter to test the resistance of the fuel pump. It should be within manufacturer specifications (typically around 0.5-2 ohms).
- 44. Check fuel pump operation by applying direct voltage to it; it should run smoothly. If it doesn't, replace the fuel pump.
- 55. Inspect the fuel pump control module for any signs of damage or burnt components. If damaged, replace it.
Common causes
- Faulty fuel pump control module
- Wiring issues to the fuel pump or module
- Poor electrical connections at the fuel pump
- Faulty fuel pump
- Low battery voltage affecting module performance
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
It's drivable but fuel delivery may be erratic, so fix it soon.
Will this problem come back after repair?
If the root cause is properly addressed, it shouldn't come back.
Why does this code come with other codes?
These codes often relate to fuel system issues, so they can trigger together as symptoms of the same problem.
Working a real vehicle right now?
Let DiagCoach walk you through it live with your specific symptoms, vehicle, and what you've already checked.
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