Fuel Pump Control - Incorrect Signal
Fuel pump control module is sending an incorrect signal.
Heads up: this code wasn't in our hand-written library yet, so DiagCoach AI built this page on the fly. Double-check critical specs against service info before condemning parts.
What it means (plain English)
The fuel pump control module isn't telling the fuel pump to run properly—it's either sending too much or too little power, affecting fuel delivery overall.
What the computer is actually seeing
The Engine Control Unit (ECU) expects to see specific voltage levels from the fuel pump control module, usually between 0 to 5 volts, which indicates pump operation status.
What a healthy reading looks like
Expected voltage from the fuel pump control module should be around 12V when active; ideally, you'd see a PWM signal around 30-50% duty cycle according to demand.
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.
- 1Check fuel pump relay operation; should click when activated. If not, replace or repair the relay first.
- 2Inspect wiring and connectors on the fuel pump and control module for damage or corrosion. Repair as needed.
- 3Measure voltage at the fuel pump while cranking the engine; should be between 11-14 volts. If not, trace back to the control module.
- 4Check the fuel pump itself; remove and bench test if you suspect failure based on voltage readings.
Common causes
- Faulty fuel pump control module
- Wiring or connector issues between the module and fuel pump
- Fuel pump itself is defective
- Short or open circuit in the fuel pump circuits
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
Not recommended. Driving could lead to stalling or power loss due to inadequate fuel delivery.
Will this code come back after repair?
If all connections are secure and the issues are fixed, this code shouldn't return.
Why do I see this code alongside others?
This code often pairs with other fuel system-related codes due to similar electrical or mechanical failures.
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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